Opa1612 vs opa2134 forum. I should have done my research a bit better The OPA2134 is more a better replacement for the TL072 when you need a FET type. I tested the opa2134 vs the ad712 that were stock. ah so much other untested opa's 1678 still on my list ina1620. I recommend the OPA2132/OPA2134. help to check the reason. Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. Both fet based opamps sounds a little bit more solid in the bass (not This blog article/post is a deep dive into currently available 8-pin DIP dual op-amps, for those that like to swap op-amps in their designs and/or DIY projects. Featured Vendors For a drop in replacement, ( in this case a crossover) unity gain, no excessive drive problems, is the OPA2134 still the go-to? IC opam âm thanh MUSES02 chính hãng ( có thể nâng cấp cho OPA2604 NE5532 LM4562 ) MUSES02 là một opam đôi - dual-op - cao cấp hàng đầu sản xuất bởi Công ty JRC tại Nhật Bản. Donations. Assign an op amp symbol that uses just the 5 pins. Other chips to consider are the AD825 or OPA627, you'll need pairs and an adapter board. But both OPA1612 and OPA2134 has a common emitter output stage. The circuit has been discussed in a german audio forum (AAA-forum, analog audio association) and was built under the name PlatINA. 4kHz bandwidth LM49720 and OPA2134 all have the same level of performance with the NJM2742 having the worst performance of the bunch and the LT1352 being just slightly worse. Nov 19, 2015 OPA16xx (i. This is a forum where guitarists, from novice to experienced, can explore the world of guitar through a variety of media and discussion. Noise is almost same as with LM4562 and there are no problems with distortion. Thread starter ast8346 OPA2134 OPA2604 Please feel free to suggest other models. I was very pleased to see the AudioKarma Audio Forums. With this buffer amplifier and the 5KOhm potentiometer turned to max. Replacements: For the 5532 the opa2211A or opa1612 as well as LT1358. OPA2134 vs. In other words, OPAx132PA and OPAx132UA (standard grades) are equivalent to OPAx134, which does NOT have a high grade. Thread starter bmwrob; Start date 2002-05-05 8:35 am; Status This old topic is closed. 魅族mx4pro运放芯片用的是1612，而xplay 3s用2604，不知道魅族能不能比vivo更屌呢？ 貌似老外们觉得2604比较好有助攻的么 OPA1612 与 OPA2604 对比？ A TPA6120 chip needs a low impedance input circuit, as shown by TI, such that an input buffer before the TA6120 is pretty mandatory. Share Jun 18, 2019 at 5:23 AM. From 7 up to 12 channels of Purifi 1ET400A amps, LT3045/LT3094 regulators, OPA1612 or Sonic Imagery Reviews. Dual customzied solution will give unmeasurable distortion (possibly -180db). If you have guitar related questions 高音質電源改善アクセサリーを中心に、音響を中心に電気で世の中に貢献しています。 OPA1611, OPA1612 www. There is a small thread over at The OPA1622 seems to have better drive capability at 145 mA vs. 6mA. Audio, Audio, Audio! DACs, Streamers, Servers, Players, Audio Interface. DIY (Do-It-Yourself) Discussions Dual OP Amp Board Preamp DC Amplification PCB DC Pre-Amp Amplifier Empty Board Module for NE5532 OPA1612-Q1: 1Mb / 31P [Old version datasheet] SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier Burr-Brown (TI) OPA134_071: 403Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS OPA134: 432Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS More results. OPA1612 sounds better than any transistor hi i wanted to know if anybody have used the above opamps. Anything other than these values and they're either fake or damaged (or both). The others are the Nationals such as the LME 49720 etc. There are several motherboard designs that are emphasizing high impedance headphones (they The swap meet forum is for private non-commercial transactions. It will give Other Parts Discussed in Thread: OPA627, OPA1622, OPA1688, OPA1612, OPA2132, OPA2134, OPA2604 Hi all, I'm looking for a very good THD performance op-amp, better than 100dB over 10Hz to 30kHz. OPA1612) - quite popular in higher end consumer devices - largely transparent - don't have much experience with them but they are often Forums. If they don't sound good in that application, I THD+Noise vs Frequency 3 Description The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. Link to post here: Your Current DIY Project Pictorial I've previously checked, and I don't think there are any threads specifically about rolling op amps (plenty about tubes), so I figured I'd start one. OPA2134 OP amps. 对这个指标不是很明白，如果我用它做电压跟随，输入阻抗是多少呢？ 那个Differential的输入阻抗指什么 The Vendor's Bazaar forum is for commercial offers and transactions. First off, I really like the sound and presentation of the OPA2134 that came with the Rudi. The 5532 has a slew rate of 10v/us, or about half that of the 4562- and it's very hard to see why this is important for any audio applications as the full power bandwidth for the 5532 with 15v supplies is about 110kHz, OPA2134 and OPA2604 are very close in data. Joined Sep 4, 2021 Messages 9,056 Likes 15,511 Location UK/Cheshire. According to the TI datasheets OPA1612 has less noise than OPA1656. Featured Vendors the LME49990 and the OPA1612. Jan 11, 2021 at 2:01 PM Misc. but blindly replacing an older LF412 in an existing piece of equipment with them is a very bad idea and the OPA637 isn't even unity gain stable, just no! The diyaudio forum might be better suited for posing the question. The TPA6120 chip is a Forum Donor. another in "ideal" situations, but often this is of absolutely no use once you actually start installing these devices in place of another one in a particular Ive been considering doing this, as I know I could. The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing Forum Donor. Log in Register. Now they seems to have changed again to opa1612 in many places - maybe a suggestion to try ? I have tried ne5532, opa2604, lm4562 and opa1612 and I prefered LM 4562 in both Aiyima a07 and the tpa3251-based Hello, Wandelblu, Minon. DanielT Master Contributor OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers 1 Features • Ultra-low noise: – Voltage noise: 2. the O2 dScope measurements that NwAvGuy posted. Joined May 28, 2020 Messages 1,861 Likes 7,160. AMB Laboratories DIY Audio Forums. Content is provided "as is" by TI and community contributors and AudioKarma Audio Forums. 鹿 . i expected Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136. Please answer to yourself. Reactions: Phorize , August and Evgeniy I hate such ugly clipping behavior(any real opamp of serious manufacturers have an ideal clipping without screeching) and one that fact is enough to me to consider that chip junk. At this point noise and ultra low noise supplies might be the last area I should put more effort into for this interface. Totally agree; also the way you decouple the OPAMP, the type of capacitors and where they are physically located around the OPAMP makes the difference. That's always a compromise between worst-case output impedance (lower for lower values) and things like channel imbalance (usually better for higher values, for whatever reason). Thread starter ROBSCIX; I shared (in the DIY Project Pictorial thread) my recent experience with replacing an NE5532 op amp with an OPA2134 in my DIY phono preamp. Joined Jan 10, 2006 Messages 102 Location Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power u-have-checked-see-its-stable-havent-you. 5nV, or -115. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on Is the OPA1612 good enough to feed into an external amp? It's in the Fiio K3s but I want to use it as a standalone DAC In terms of noise performance in the real world the OPA1612 beats the LME49720. What I would like to know is how OPA2134 has good tone and detail when in single mono mode ie with two op amps one per channel. Joined Aug 27, 2018 Messages 1,427 Likes 767. Now, we run through a hand calculation to find the total noise of a simplified audio system. It works with no problems. That seemed Prodigy 205 points. Featured Vendors anything better than opa2134 Hi, Interesting that no one has mentined opa2132P so far. I get the criticism of it sound ”artificial” but that darn Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. E. pdf (sorry, pasting the address makes a huge link) you use a The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. Thread starter J English; Start date Nov 8, 2023; Tags aiyima class d amplifier J English Super Member. opa2134系列是超低失真，低噪声运算放大器，为音频应用完全指定。本文介绍了opa2134引脚及特性，其次介绍了opa2134封装信息与绝对最大额定值，最后介绍了三款opa2134的应用电路。 Home > Forums > Blogs > RJM Audio Blog: Audio op amp comparison NE5534A vs. -Category Forums. 2 dB at 1 kHz, while driving a 32-Ω load at 100-mW output power. Below picture is the Sch , and the distorted waveform is attached vedio. Another Super High End Phono Stage! OPA1612 (BJT, super low noise, one of TI's latest audio offerings) OPA1642 (JFET but otherwise similar to the 1612) So far my favorite is the 1642+1612 followed by OPA2134 at the input and LME49720 at the output. If you're comfortable desoldering soic8 opamps, you can consider swapping opamps but I wouldn't suggest it. OPA1602はOPA1612より1mA少ない OPA1602はUnity Gainでの安定度が高い。 OPA1612はOPA1602よりも安定度が悪いのでゲイン1以上で使ったほうがよさそう。 容量性負荷の場合，OPA1612はCfが必要。OPA1602にOPA1612と同じCfを取り付けると容量負荷でもオーバーシュートが出ない。 OPA1611, OPA1612 www. For the Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, 部件号：OPA1612 主题中讨论的其他部件： OPA2134， LM4562. the TI's LME49860, LME49720. LME49720 sound is boringand too light. 7 mA quiescent current is typical of the OPA627, for the OPA2132 it should be typ. Review Index. Total Noise of OPA1656 vs OPA1612. 3 DGND 3V3 OP275 360R U105A C127 330R C129 4 lang:en score:21 filesize: 3. OPA827. The higher current drive of the OPA2822 would be beneficial. Sometimes I change from OPA2209 to OPA1612 to hear extreme detail OPA1612 let you hear the flies in the recording studio With OPA1612 you will hear details you never I have an Onix XCD-99 which is basically a Music Hall CD-25. 8 mA, for the OPA2134 typ. New posts Latest activity. ti. Chris ps. If possible, you could try all of the three op-amps from above without getting worried to get oscillations. The These are probably among the two highest of the best sounding dual opamps around today. The soundstage is the only good part, it's the wider due to the bass boost and upper midrange scoop. Solid State. The AD826 seems to be smoother than the OPA in the voice range. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. As mentioned previously the OPA2134 in BIFET is a decent performer. Mar 27, 2023 #1 Hypex NCx500 Power Specs (1kHz, THD = 1%): - 700w @ 2ohm (peak) - 700w @ 4ohm (peak) - Buckeye buffer stage (OPA1612 OP Amp), allowing for Low/Med/High gain settings via toggle switch on the rear. May 2, 2022 #185 Isn't the OPA627 a single channel opamp vs the OPA1612 is dual (so you would need two 627s per OEM opamp replacement)? J. Avoid LM4562/LME49720 and OPA2134/2604 if you do not want to re-engineering circuitry to make it stable. Content is provided "as is" by TI and community contributors and OK i've been testing the OPA2227, OPA2228, OPA2134, OPA1612, and the Muses 02. These would toast at +/-20V so minor tweaks of the power supply/voltage dropping resistor may be needed. Likewise I would have thought that an OPA2134 is an AD8066 vs LM4562 I am using an AD8066 in the O/P stage of a Musical Fidelity X-DAC V3, preceded by OPA2134s, instead of the original all NE5532s. Other Parts Discussed in Thread: LME49720, LM4562, OPA1654, OP07, OPA2134, TL072, OPA1652 首先关于LME49710、LME49720、LM4562这3款运放一直有个疑问，究竟这三者之间是什么关系，LME49710是单运放，另外2款是双运放，LM4562是LME49710的双运放版 I talked to a TI/B-B applications engineer today. OP . Here we can also see that the audio analyzer itself is the limiting factor for the Site Site Announcements Forum Problems & Feedback Terms and Rules. AD8610. as well and I might try a opa2134 I have lying around. This may be the case with low frequency filters. Pictured with V5I-D's, OPA2134 and a HDAM Full Discrete which is two singles on an adapter. Since all of these options are only available in surface-mount packages, you might want to look at our DIP adapter EVM, which can adapt many common SMT op amp RC4580 vs NJM4560 vs M5218 vs OPA2134 etc. 1nV/sqrt(Hz) and 0. Good to see so many on this forum liking this opamp. At >$6 each it's not cheap, but it's a lot cheaper than the "discrete" opamps out there and at Prodigy 20 points. For DIY amps, there are forums for electrical engineering hobbyists that can help suggest an op amp that will fit for your particular circuit design. 75 mA of the OPA1688, but it's 5 times more expensive and the package is 10VSON which is nearly impossible for DIY work. Finally had a chance to roll some Opa1612 and gotta say it's one of the best op amps ever made imo. Overall, don't recommend opamp rolling. Amir, if you want an lme49720 op-amp or two let me know and I will mail them to you. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. I stopped using OPA2134 because in the end I preferred the others soundwise. OPA1612 is one the most low-noise opamps ever built, so Menu. I found that OPA1612 was in the ultimate soundplus collection I'd go for an OPA1612 as an upgrade in virtually every circumstance. From my understanding, there is not much in the way of an improvement when it comes to upgrading the op amp in the xDuoo XD-05 and Little Bear B-4. So I can use any one of these ( one at a time !). (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is Only really better substitution for NJM4580 for example as Pre-Amp can be no less then OPA2228 or even better OPA1612, but for that -3dB less noise (and distortion) over whole audio spectrum you will have to play premium extra. Of course layout and bypass design matter along with the basic circuit as shown on the schematic, its not just the chip. Yes, I know everyone likes to think you need GHz op-amps for I/V. thuanth Posts: 5 Likes: 1 post Liked in: 0 post Joined: February 16th, 2018, 3:27 am Location: California Country: Top. 5mV vs 2mV, respectively). The OPA2228 didn't sound good in the DAC, and was the least good in the op-amp gain stage. OPA134 Posted 10th February 2012 at 11:49 PM by rjm Updated 11th February 2012 at 03:48 AM by rjm. The most obvious difference it the wider soundstage. So I don't know. Reactions: TheWalkman. Audio, Audio, Audio! DACs, Streamers, Servers, Players, Audio Interface which btw is again OPA2134 in D10? Speaking of that, are you familiar that Amir did try rolling the op amps in place of output buffer in D10 and OPA1612 didn't perform any better than OPA2134? Last edited: Aug 17, 2019. When used as a single dual stereo op amp I find the soundstage a bit flat and a thick sound. This is close to the minimum supply voltage for any of these devices (including the one's fitted). I also really liked the OPA627 that I had in an audio-gd dac years ago. But you know how to use the Search function. It ensures a very low noise density as well as an extremely low distortion level. (Came with the other DAC an Aune X8 XVIIIth. The new national opamps are also there with extreme slew rate of 1900v/usec just like AD815. I also need to check out the OPA1688 as a general-purpose small-signal and line-level dual opamp as an alternative to OPA2134, LM4562, etc. Regards, Thomas thought i'd dig this one up again. . It is difficult to say which one is better. Favorite low-noise preamp circuits? The OPA1612 opamp has similar specs to the AD797 and it is considerably cheaper, plus it has 2 opamps in a single package VS the AD797 which has a single opamp. Solid State . 00033%をたたき出しました(opa2134使用)。高級オーディオ機器でもなかなか見ない数字です。スペクトラム上でも高調波は-120db近辺以下ですね。 Forum Donor. Âm thanh của MUSES02 rất trong sáng, nền sạch, độ phân giải tốt, chi tiết phong phú, không có gờ nhiễu và trường âm rộng và sâu. FET on the OPA1688, but strangely it is actually higher at 10nV/sqrt(Hz). alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. I just thought using two opa627, i will achieve 2134's audio quality. That should get you going. Dears . This takes a slight By the look of the circuit diagram, any common low noise dual OP amp will fit. Is there any better OP than OPA2134 regards Site Site Announcements Forum Problems & Feedback Terms and Rules. the LM4562/LME49720 and the OPA2134. The OPA1611 and OPA1612 offer rail-to-rail output swing to within 600mV with a 2k load, which increases headroom and maximizes dynamic range. New posts New media New I found one posting in a board where a guy claimed he changed the ne5532 to the opa2134 and noticed a real difference in a DBX compressor. Thread starter ROBSCIX; Start date Jul 4, 2009; it is better than OPA2134. What's new. Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. 3. Source & Line Analogue Source Analog Line Level Digital Source Digital Line Level PC Based. OPA2134 or OPA2604. The OPA1611 and OPA1612 offer rail-to-rail output swing to within 600 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. For one of the OP amp it's optimal with 1k and for the other one it's 2k. Also, according the data sheet, OPA1612 Equipment Forums. Joined Mar 1, 2016 Messages 3,157 Likes 4,198 Location OPA2134; OPA2228; NE5532; Also I read somewhere the OPA1612 is somewhat related to the OPA2211 and the 1612 is more the "audio" version of this amp. Also compared the OPA1612 to an NJM2068 and OPA2134 in a moving magnet preamp and it was, as expected due to higher current noise, noisier than the BJT '2068 and FET '2134. The old NE5532 is showing it's age now. VIN(DIFF) Differential input voltage ±VS V IO Output short-circuit(3) Continuous TA Operating temperature –55 125 °C TJ Junction temperature –65 150 °C Tstg Storage temperature –65 150 °C (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Oct 2, 2021 #12 Personally I'd not bother. Quite a while ago, and on EW's recommendation I upgraded the OP amps in my AU-D11 II from the original M5219L SIL-8 package OP amps to OPA2604 PDIP-8 OP amps. If you really feel the need for something faster, look at ADA4898-2 or ADA4896-2 (+/-5V supplies max). 4 Calculating Voltage Noise at the Output. 9dBV vs. by amb » January 27th, 2024, 10:37 pm . Digital To Analog (DAC) Site Site Announcements Forum Problems & Feedback Terms and Rules. OPA1612 is a great amplifier, however, it is bipolar (input type) and when used immediately at the front-end of a guitar input, the input current noise (1. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. All are direct replacements, nothing else need to be modified. NE5532 is a very good amplifier especially for the price ($0. Misc. The first one is sounding warm and innofensive, and the LM 4562 is cleaner and leaner. So, it is a different design and chip. OPA1642 was clearly beat by OPA1612 being more "rocky" and forward. Ivan TT said: If its HO out is driven by opamp as an output My choice would be OPA1612 oder ADA4898-2. Forums; Unread; app_sign_in; opa1612 与 . 4 mA, max. The index on the front page does not list Electronics Open-Loop Gain and Phase vs Frequency Offset Voltage Drift OPA828, OPA2828 SBOS671D – SEPTEMBER 2018 – REVISED DECEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. , the DC offset at the TPA6120 output is AudioKarma Audio Forums. So here it is – the UBIQUITOUS TPA6120 amp. Sure, a DIY amp is going If you can use a bipolar OP, the NE5532 is usually the better choice than a JFET OPA2132 / OPA2134. 01pA Other Parts Discussed in Thread: NE5532, OPA2134, LM4562, TPA6120A2, OPA2604, OPA1652, OPA1612, OPA1662-Q1, OPA1622, OPA1688, OPA627 I am putting together a solution for a pc based hi fi audio system utilizing low impedance headphones. gif In fact, dual OPA627 on Browndogs would have been something to consider as well. 24 M page_count: 34 document date: 0000-00-00 Hello samsagaz-I am sure that everyone here will agree that the "specs" often given for various IC op-amps might help differentiate between the possible performance of one chip vs. The OPA2134, in comparison to OPA1612, is more detailed but perhpas shrowded. html The OPA2134 gives very good results in many applications and is pretty I'd recommend LME49720 or OPA1612 which have excellent specs and the datasheets do not indicate they require any special I do not know if you are interrested but i have a preamp using the AD8610 (Which is basicly the same as a AD8620) and compared to the OP275 (I know it is not the OPA134) the mid and highs are more smooth and more detailed. - Etwas flachere Darstellung als beispielsweise OPA2134 - Eine etwas künstliche Darstellung Auch wenn der OPA2134 Forums. I couldn't tell the difference between the In fact when the originals were first installed I remember thinking that they didn't sound as good at the LM833's in there previously! But these OPA2134's sound nothing like the original ones. The OPA627 is, without doubt, a superb audio op amp. New posts Search forums. that some of the high-end Op-Amps are hitting distortion and noise figures that i would think is hard to beat like the OPA1612 with its 1. And without mentioning every op amp in existence, I'll close with I yet have to find a circuit where an NE5532 is the best possible option. I must One can almost not find two more different sounding IC:s. OPA2134 op amps are easy to use and free from phase inversion and overload problems often found in common FET-input op amps. 000015% THD or the OPA1642 if JFET is the way to go. However they measure and perform worse than SOTA audio ICs like lme49720, opa1612, opa1656 etc. OPA2134 with JFET front end or NE5532 would be O. 000015% at 1kHz. I hear OPA828 is the new version of the OPA627, so I may try that one out. From what I have also noticed, there isnt any competitor to Burson, at least not one that I can find. And even if I prefer it, it probably won't be sufficient of a preference to be worth caring about. 2vdc. i had to search through multiple forums etc to coble together bits of the mod. This one started as a group project involving myself and few other guys forum mates. The OPA1688 even beats Therefore, the OPA1612 simulation model really only contains one op amp having the pin order of the single OPA1611 op amp. LME in other hand, has common collector, so it is better for loads like DAC AVCC, I believe. Just found a space to test AIYIMA A07 with OPA2134 opamp. We would like to show you a description here but the site won’t allow us. OPA1612 makes a decent headphone amplifier. Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. DIY (Do-It-Yourself) Discussions OPA1612, AD826, LM7332 . Transients are stronger, both rimshots of snare drum The LM4562 is an exception, but otherwise it are the fast op-amps that JRA has trouble with: Misbehaving: OPA1656, gain-bandwidth product 53 MHz LME49990, 110 MHz OPA1612, 40 MHz Behaving well: OPA2604, 20 MHz OPA627, 16 MHz OPA2107, 4. AIYIMA's latest TPA3255 power amplifier has PFFB function and is equipped with 48v5a GAN power supply. i'm also Other Parts Discussed in Thread: OPA1612, LMV1032, LMV1012, OPA2134. I also refurbish large format recording consoles. Part Number: OPA1652 Other Parts Discussed in Thread: OPA2134 , TINA-TI Hi, Could you please give us your advice whether we can replace OPA2134 with OPA1652 in TI E2E support forums Search Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, The Vendor's Bazaar forum is for commercial offers and transactions. But in terms of single op-amps I have some to try - LT1028, OP27, AD845 and NE5534. Ah, I wanted to mention that I've also tried a few discrete opamps: OPA-Earth, OPA-Sun and OPA-Sun V2, from Audio-GD. The supply voltages are +/-12V and both are capable of supplying up to 1A currents. If you want to reopen this topic, contact a moderator using the "Report Post" Even the Voltage noise spectral density curve in the OPA1612 datasheet figure 32 shows lower noise when the source resistance is low. Thread starter JoeBob; Start date 2002-01-07 4:08 am; Status This old topic is closed. I quite like the Burr Brown OPA2134 as it has a high impedance JFET front end, is very stable, gain setting is very simple and they have almost zero dc offset at it's output (I use quality 0. The voltage noise figure for the NJM4556A *should* be lower, being bipolar input vs. Some will point out the OPA1612 (which is even better) or the OPA1656. The first time I did test with opa1642 opa2156 (precision opamp version of opa1656) opa1612. Featured Vendors I guess what puts me in a dilemma is that Burr Brown branding behind the well known OPA2134 vs. The Burson is just a little better in my opinion. DIY (Do-It-Yourself) Discussions. I Hello everyone, I have the DAC Emotiva XDA-1 preamp with the DAC Analog Devices AD1955 and Burr Brown OPA-2134 op-amps, I want to update to the Burson Audio Play with the DAC: ESS Technology SABRE32 / ESS9018 and NE5532 X 3, NE554 X 2 op-amps, would it be a good update to the Burson Audio? thank you very much to all. i. Different opamps have differing decoupling requirements too, so that might need checking. I plan to get the brown dog adapters and try the opa 627's soon. Home. Marketplace Home. 5 mA. For the case of Hi Ervin, Yes those devices are very popular, unfortunately I don't have any way to know for sure when they are back in stock. Joined Feb 22, 2022 Messages 32 Likes 4. 000015% at 1 kHz. New Aiyima A07 MAX Amplifier - Small Footprint, Good Sound. The one usually put forward as best is the opa2134 AD8620 OPA1612 OPA2827 1. Turntables . 00 : Crosstalk - 110dB PSRR - 80dB min, typ 100dB Distortion - 0. It measures quite a bit better than the opa2134 in a variety of areas and has the same pin configuration, which means they are directly swappable. But that does not say anything about the SQ. One relevant point is that the supply voltage as shown is about +/- 6. Site Site Announcements Forum Problems & Feedback Terms and Rules. Just now, my AVCC power supply is based on LME, and sound is way better, than OPA2134. The OPA1642, SMT-only, is also a good dual BIFET. Loudspeakers Multi-Way Full Range Subwoofers Planars & Exotics. If you have NE5532 after the volume potentiometer, than exchange it with OPA2134 ••• During testing, OPA2134 and OPA1612 came out good. AIYIMA A07 TPA3255 Amplifier Measurements and Review - LM4562 (and OPA2134) option. living sounds if you are out there how did you go with your aurora mods? did you feel it was worth it in the end? so far i've got. LM4562 is another level altogether. If you want to reopen this topic, contact a moderator using the "Report Post" button. 1nV/rtHz vs 7-8nV/rtHz) but still has a reasonable supply current of 3. 1uF film caps on their outputs which doesn't Comparison LM4562 vs OPA2134 vs NJM2068 vs NJM4556 LM4562: Strong bass . d. Audio, Audio, Audio! Amplifiers, Phono preamp, and Analog Audio Review The different players sounded different. SMSL SU-10 vs M500 MKIII vs DO300 21 vs 9 vs 11 dual op-amps OPA1612 (accoring to the spec from smsl-audio) What is the Op-amps doing in that? M500 SINAD Reviews. If the orginal OP is a FET (like TL072, OPA2134 etc) we may be careful sometimes NOT possible to replace with Bipolar (like NE5532 etc). DIY What is the best recommended op-amp for the filters on the AK4396 DAC? NJM2068 is installed and I have some OPA2134 and OPA1612 available. K. The OPA1622 offers extremely-high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 What impedance circuitry is involved - current noise specification may be crucial, in which case the MC33078 are fine - similar to NE5532, or you could go to JFET opamps. For this example, we are using the OPA1656 in a non-inverting configuration with a gain of 40 dB or 100V/V. The OPA1642, The OPA2134's are pretty good, especially for the price. But deep bass and transients seem more punchy in the OPA2134. Burson V5i-D better than OPA1612 stock Xduoo XD-5 . Standard opamp for that has pretty much become OPA1612. I would say it depends on what circuit. Last edited by mediatechnology; Pro Audio Design Forum Despite their warts I still use the LME49720 in the Dual Class-A II alternatives for the OPA2134? Home. Just did an A/B with 2 opamp buffers on my Hypex NC500 I would like to upgrade an audio amplifier OPA2134 and the TI site web recommands me to change for a new OPA. Common-Mode 10^9Ω || 2pF. These replacements sound clean, crisp and dare I say it. It's best use as an alternative to opa1612 when noise is not a big concern. Joined Oct 19, 2020 Messages 24 Likes 10. y. But I just used the standard Nichicon's I had on hand, I will definitely try the Silmic's once I get some. - high levels of DC precision are generally not required by audio customers (audio equipment makers). If a FET-input amplifier is required The LM833 was released way more than 20 years ago, and if memory serves, OPA2134 was released around the year 2000, and LM4562 around 2006. Depending on the actual application circuit, there are alternatives with better noise performance. On the flip side, it has substantially lower input voltage noise than the OPA1688 (1. OPA2604 is a little bit faster. Forums. It appears that the OPA1611/2 have a lower noise I'll look at it if you know of one amp using OPA1612 sounding audibly better than another amp using cheaper op amp in objective listening comparison. The OPA1612 is nice as well. musical. OPA2604 is one of the few op-amps having +24 -24 max supply voltage. Suggest measure I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. Opa1656 has good phase response at high Other Parts Discussed in Thread: OPA2134, LM4562. OPA1612手册第3页最后几行，Input Impedance栏：Differential 20KΩ || 8pF. While it still has some treble sparkle, It isn't enough to save its sound of complete mudyness and lack of detail. 004% @20KHz The above parameters are insignificant to the audio level variations imposed by substandard audio recordings, room modes and compromised 比較したのは高音質のもの限定で厳選した電圧帰還icのlme49990、opa627、muses8920、opa1612（opa211 についてはすでにテストしてあるものであっても高評価ではなくて、他にopa2604 - opa1612(ti) : 同メーカーの1622と同じ傾向ですが、ほんのわずか歪っぽいかなあ。 0. 8-nV/√ Hz noise density with an ultralow THD+N of –119. com SBOS450C –JULY 2009–REVISED AUGUST 2014 5 Pin Configuration and Functions D Package OPA1611, SOIC-8 D Package (Top View) OPA1612, SOIC-8 (Top View) DRG Package OPA1612, SON-8 (Top View) (1) NC denotes no internal connection. Agree with previous post, fast, detailed, revealing and neutral. 1nV/√Hz noise density with an ultralow distortion of 0. Forum Donor. . OP249 does not sound dry like OPA2134. 5). When the original OP is Bipolar(like NE5532 etc) we can most always replace with FET or another similar Bipolar OP. evm1024 Well-known member. Joined Sep 4, 2021 Messages 9,115 Likes 15,621 Location UK/Cheshire. I think audio grade OPamps, in the right application, are very good. 我想升级音频放大器 opa2134、ti 网站再次命令我更改新的 opa。 我发现 opa1612是 soundplus 终极产品系列中的一款产品、这就是我对它进行更改的原因。 遗憾的是、对于新的 opa1612、我在输出通道上获得了大量噪声。 我尝试使用 ne5532p 等低成本组件、无噪声、opa2134无 If this were a new design then I'd agree use the OPA2134, OPA627 etc. But I really THD+N Ratio vs Measured Level / Inverting 6dB Gain / 100k load / 22. This combination will sound slightly more clinical than the ※在庫数欄の表記が『おひとり様 点まで』となっている商品は、現時点で、おひとり様（1団体様）あたりのご提供数量を表記の数量へ制限させていただいている商品です。 Link for opa1622 and opa1612 link I got this OpAmps more than year ago and still can't be trusted, but 1612 need soldering and SOP8 to DIP8 converter. Members. If your opamp it is not in that place, after a potentiometer, then you leave it , dont change it. Thread starter 439598; Start date Dec 15, 2017; 1; 2; 3; Next. I use these amplifiers for pro audio. Might be interesting to do op-amp comparisons in the future on various products (the FX Audio DAC-X6 is also Forums. So, parts are not spec'ed for or The OPA1622, dual, bipolar-input, SoundPlus™ audio operational amplifier achieves a very low, 2. He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. 9 nV/√Hz at 10 kHz As for OPA627 vs. The TL072 isn't great IMO. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Several reference are used on forum. If your current is a OPA 2134, then its best to optimised that with a OPA 827 X2 or OPA1612, or a OPA 1642. 6SL7 tube SRPP gain stage with voltage shunt feedback. OPA2604 is a good allrounder so to speak. Go. Thank You . Pin can be left floating or connected to any voltage between (V–) Misc. Normal audio can use the Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. Anther, When we used opa2134 or lm4562 to replace opa1612, the distortion disappear. I've had an OPA1612 lose its mind in a filter circuit where an LME49720 worked just fine. A true FET input stage is incorporated to provide excellent sound quality and speed for exceptional audio performance. AD826 used instead of the the OPA2134. Audiokarma Home Audio Stereo Discussion Forums I’m wanting to change out a dead chip in this Marantz 3800 and there is a known mod where you remove some components and add some jumpers then a 2134 will work On a more detailed note, since the 49860 has a wider operation voltage range, did you ever try running it in different voltages ie < 9V (battery) vs higher voltage to see any differences in performance? @ joe_cool: I believe I also read the comments of that engineer; he even recommends to try the LME49713HA. maybe modern production 3886 are all above average? the designs seem to take the 'typical' GBW spec as the effective minimum My guesstimate puts the safe with production variation margin local closed loop gain corner as low as 100kHz for LM3886 with a greater than 4:1 range designing for stable extra loop gain from the nice input op amp Other Parts Discussed in Thread: OPA1612, OPA2134. This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. My first tests were with an OPA1612 (equivalent to OPA2211) in the instrumentation stage, but I didn't manage to get the circuit ringing free under all circumstances due to sloppy wiring, decoupling and grounding. Current visitors. 003pA per root Hz) gives 1276. I gave it high marks for very low distortion at extremely low budget price. Another way to say it: JFET OPamps like OPA2134 can Unpopular opinion- If you are talking about measured performance in the audio band, it probably is OPA1612 or LME49720. The OPA2134 is the best FET for the buck at around $3-4 each. Krunok Major Contributor. In note slyt630. OPA 1642 and the In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. 1-nV/√ Hz noise density with an ultralow distortion of 0. 5 Euro OP275 ~ 3 Euro OPA1612 ~ 6 Euro According to specs I would think the OPA1642 would be one of the best compromises cost vs performance wise. This is for the pictured E-MU 0404 USB. Note the OPA2211 goes for about $11 on Mouser and the 1612 goes for about $7 on Digikey - and both are SOIC. My favorites at the moment opa1642 and this one opa1656. Headphone Amps (full-size) Thread starter chillysalsa; Start date Jan 28, 2018; Jan 28, 2018 at 5:22 AM Thread Starter Post #1 of 5 chillysalsa I recently got a Matrix Audio M-STAGE The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. 5V to ±18V power supplies. The OPA-Earth was tonally dull and midbass lacking, the OPA-Sun was mechanic in the mids, the OPA-Sun V2 was the best sonically but produced a whopping 375 mV of DC offset where all of the chip opamps Yet another TAP6120 based headphone amplifier you’d say. I do understand that some of you on this forum design amplifiers and other stuff and kits like these could be used for some evaluation test and if you design circuits you develop OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. LM4562 vs OPA2134 vs [ ? ] Home. This configuration is best for use in setups with a Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. I've ordered some opa2604's from ebay still in transit to play with. New items New comments Author list Series Misc. 当我们使用opa1612将差异输入转换 为单端输出时， 输出会失真，请帮助检查原因。 下图是“Sch”，失真的波形附加了音频。 此外，当我们使用opa2134或lm4562来替换opa1612时，失真 消失了。 Muses02 vs BB OPA2134 in Topping A30 (single-ended to differential buffer) Rig includes: Topping A30 and D30, HD600s (vintage 2017) with HD650 (genuine Sennheiser replacement part) 3m cable (1. Other Parts Discussed in Thread: OPA2134, OPA2604. Speed is an issue, though. Both are OPA2134 and NE5532 both have power supply currents of about 4mA per channel, and have been widely adopted in the market (understatement). Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI engineers. However, I remember that the chip was about 3 times worse vs opa1612 regarding noise in I/U stage and even more noisy than opa1602 which draws 3x times When low bias currents are needed with superior performance then the OPA2134 is often a good choice, though it is at least four Audiokarma Home Audio Stereo Discussion Forums and Bel Canto e. Well maybe you are right. I've studied around in different forums and found information about differences between the resistor value going to ground. One S300iu In that case, OPA1611/OPA1612 are very good bets. (for leaded packages at least) can be improved by placing output between +/- VS pins giving smaller loop area for output current I've also seen soic types with common connected feedback OPA1652 does surprisingly poorly if still at a high level (the spray of high-order harmonics is a bit disconcerting, 1662 does this better), while OPA1642 does well along with OPA1612, as does the trusty OPA2134 interestingly (if a Forum Donor. 4. OPA2134 gain stage with voltage series feedback. On Head-Fi forum they say OPA2209 is better than 1612 & Burson. Thread starter Neruda; Start date Nov 22, 2001; Nov 22, 2001 at 2:39 AM Thread Starter Post #1 of 9 Neruda Banned Moderator. The OPA2134 is more a better replacement for the TL072 when you need a FET type. JohnW pfm member. 1 of 3 Go to page. I don't care about listening tests or something else, just I am just curious how opa2134's output performance. 最近需要用到咪头采集人体的生理信号，咪头的灵敏度在-34dB以上，信噪比大于58dB,频率响应范围在20Hz到16000Hz。不过昨天我将咪头的两个引脚接入OPA1612放大电路没有任何信号，想问一下咪头采集电路是怎样的？ The main difference between OPAx132 and OPAx134 is in DC precision of the high grade of OPAx2132P/U and OPA2134 (e. Dual circuit op amps, OPA2134, LM4562, LME49720 etc: For single op amps the supply pins are 4 for - and 7 There are better opamps than the AD825, AD4627-1 brz will run rings around it and the OPA 627, i would not recomment the OPA 627. max Vos of 0. The OPA1612 has lower noise and distortion NE5532 it is a very good opamp. (Opa2134 is not broken in at all, so it will most likely get better w/time) The base is much better from the 2134, but it does not seem to be as powerful on the output side, but could just be the break-in needed. May 2, 2022 #186 wallaceho said: Hi guys, Ad8066,ad825,opa2134,opa2132,ad823,muses8920,lt1364,opa827,lme6172, the ad825 and 823 would be my favorites Menu. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 Hi forum I'm playing around with some simple headphone amps ( again ) with NE5532 vs. Last edited: Aug 6, 2019. Only unmoderated members can post here. DIY (Do-It-Yourself) Discussions OPA1692 is best, compared to - OPA1612, OPA2192, OPA2209, OPA1652, NE5532, LME9720, OPA1622, OPA1602, OPA1662 For LP: OPA1692 for now, I have good expectations from OPA2209 but they are out of stock. I'd love for someone else to test. Marketplace. Hi janusz, Looking at the With the OPA2134 the DAC was more detailed but the sound lacked body. The OPA1612 has ultra low distortion, but more current noise than the existing MC33078. Sound is more "color", and "massive". The only drawback it's the input stage which is on bipolars. Go for the opa1612 given the choice. Joined C115 100N C120 100N 4 4 4 OP275 U106C U107C U108C 4 2 R144 820R 1 R153 620R U105C OP275 OPA2134 OPA2134 3 R149 R157 U102 AMS1117-3. The Silicon Chip High Fidelity preamp for 2 channel is based on the OPA2134, and is available via the Altronics franchise. The OPAx132 is the slightly better version for DC critical applications. OPA134 If I put my notes here, I might be able to find them again later! Rate this Entry Audio op amp comparison NE5534A vs. , at a very The THD+N of the 1688 should be better too, best I can tell comparing the datasheet graphs vs. (€20 DAC) vs a Topping E30 II (150€) vs the internal DAC on a Marantz CD-Player. It is a touch better than opa2134 - especially where small reduction in noise level is welcomed. 4dBV (24kHz measuring BW). I made such an input buffer using an OPA2134 in non-inverting coupling and with a gain of two. -73. Joined Jun 20, 2001 Posts 3,216 The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. Part Number: OPA1612 请问如何设计才能达到符合预期的THD+N性能指标？避免以低性能运行？ 一、比如用在一个10倍放大的线路中，作为正相放大，正相输入端可以悬空接信号输入还是需要并联电阻接地？需要的话电阻取值多大合适，反馈电阻和反相端接地电阻取多大比较合适？ Forums. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric This looks like a stock implementation of the pcm1794 datasheet output stage. when we use opa1612 to translate difference input to single-ended output, the output is distorted, pls. The Forums. OPA2134 and better parts like the OPA2827 are ok. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. OPA1656 sounded worst, Muses 8920 sounded best. I hesitate to recommend those without simulating the circuit. OPA2134 is probably a good choice in general. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). Its output power is slightly less than the OPA1688, and capacitive load capability is also just a tad less. 7dBu EIN. I posted this on the Solid State Forum a while back, before I knew this forum existed. 2. The Vendor's Bazaar forum is for commercial offers and transactions. We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. While improving on the flaws, some of the IC's SMD legs gave up and broke off. At the risk of immediately coming across as exaggerated and/or hyped -- the "battle" was simply an epic slaughter! The LM4562 (same die as the LME49720) was designed to produce a low open loop distortion - likely better than a 5532. Also wondering if it will improve If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. You can dig on the Internet and find modern op Hello together, i want to put one of the mentioned OP Amps in my amp. replace OPA2227 with AD8512 replace OPA275 with either LME49720, OPA2211, AD8599, OPA1612. Post #6,677 of 7,398 if I remember correctly) so, I assume HO is being driven only by opamp (NE5532 in stock) LO then by OPA2134? Don`t know. Joined Apr 3, 2018 Messages 348 Likes 138. OPA2134 or OPA2604 . g. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. The OPA2134 is JFET so it won't have issues with bias current so should generally be able to replace any pin-compatible dual opamp. Just set up your OPA1612 model having using the 5 pins in the order listed - as you would for the OPA1611 single op amp. NE5532 Op-amps upgrade in Musical Fidelity A5 ? Thread starter Oneoff; Start date Dec 17, 2018; Tags ne5532 op amp so I would use old school OPA2134 or LM4562. Nov 8, 2023 #1 Photos: 3 amps side by side (MAX, Fosi V3, original A07), close up of front of the A07 MAX, rear panel of the MAX) OPA2134 is great for buffer and clean applications but I never liked it for overdrive/distortion. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a Reviews. The 627's will exceed the technical Now i tested opa1612 with lme49720 and 1612 is better in my opinion. TL072 works most of the time but I almost always find a better substitute in dirt pedals. Brown Burr on the Texas Instrument site and provided you are doing R&D not for military purposes, you can order the OPA1612, OPA1642 on SOIC devices free as SAMPLE for R&D and place them on an adaptor that converts from SOIC to dip 8. Another op amps thread. Even if I can hear a difference, it's only going to be 50:50 that I prefer the difference. Currently, Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. We are also using Lets take a look at the NE5532 op-amp, used in audio products everywhere since 1979 and it costs about a $1. Burson V5i-D and Muses02 are very good But balanced sound not heavy bass. Will you hear the difference even with your ear directly at the speaker?? -74. This was only possible because of the excellent 'Brown Dog' PCB adapters made by Cimarron Technology ( OPA2134 and a few others. Equipment Forums. " Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. 4" plug). The second one could be a bipolar type with good drive The next op-amp I am planning to try is the OPA1612 but perhaps the DAC is the limiting factor and perhaps the measurements will look very similar to the OPA2134 even if the OPA1612 is a really good op-amp. Should I expect any improvement from the OPA1612? Thanks. If someone else has already tried this was anything gained? ESS THD ‘Hump’ Investigation | Page 14 | Audio Science Review (ASR) Forum . Also low offset voltage is important. Question was raised on the revision of the board and thermal characteristics of the unit so here we are. Finally got around to In addition, the OPA2134’s wide output swing, to within 1V of the rails, allows increased headroom making it ideal for use in any audio circuit. /PRNewswire/ -- Texas Instruments (TI) (NYSE: TXN) today introduced an audio operational amplifier (op amp) that sets the latest standard in audio performance. In the gain stage it'll probably be LM4562 or OPA2134 for now. Thread starter evm1024; Start date Nov 3, 2008; Help Support GroupDIY Audio Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. They can be operated from ±2. (AD8066 , AD8620). Parameter:Chipset: TPA3255+NE5532Replaceable operational amplifier chips: RT3609SM, OPA2604, OPA2134, LM4562, JRC5532, OP275GSZ, OPA1612, MUSES01/02/03 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Noise of the A07 is mostly defined by opa2134：纵向声场宽广，低频下潜不错，量感一般，高频解析力好，但是有一点毛剌，不够柔和。推荐度：★★★☆ opa2111：中频非常舒服，高频柔和，但低频比ad712还弱，声场很窄，没有传说中那 Forum Donor. TL072 (18nV and 0. Oct 2, 2021 #24 audio2design said: opa1642 opa2134 and opa1612 ) Last edited: Oct 2, 2021. I have fitted 78L12/79L12 regulators close to the AD8066, and replaced the manufacturer recommended 100nF ceramic bypass capacitors with normal 100nF 63V types. Part Number: OPA1656. Re: OPA1656 instead of OPA1612. GeekZone. JoeSVK Member. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. We are also using After working with some OPA1612 on my recent Topping PA5 D01 Module replacement project (at ASR), a friend sent me a few OPA1612 opamps he ordered when they were in stock since i couldnt get them anywhere. Sound Science. Musician and DIY builder Expert in loudspeaker installation for optimal pace, rythm and dynamics. Anyway, OPA2134 is pleasure sounding Op The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Share Reactions: LaughMoreDaily. I have a circuit I designed using an OPA2134, so I might use socket and then use a DIL8-SMD adaptor. The outcome was no great surprise but the noise character of the OPA1612, which was exaggerated due to the current noise and inductive source impedance, was still Previously i used OPA2134 Op-Amps in my DIY project and CD/DVD modification and after abou year ago i start to use OPA1612. In case of an OPA2134 I'd stick with 10k-20k, NE5532 with its much lower input impedance distortion shouldn't have much of a problem with 50k or even 100k. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. The only ones in the OPA that I liked was the ones I obtained free fron the BB site via there R&D program such as the OPA1612 . AskEngineers is a forum for questions about the technologies, standards, and processes used to design & build these systems, as well as for questions about the engineering profession and its many disciplines. The clear winners for me are the 2227/8 but I think the 8 has a slight edge Menu. e. Originally Posted by Jon L /img/forum/go_quote. discussion. +Gain Bandwidth. Pin can be left floating or connected to any voltage between (V–) The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. OPA1612 could certainly be used here, but it may be overkill in this application since noise performance of this circuit is likely to be dominated by the noise from the FET input stage. The OPAx132 is the slightly In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. 8 bucks for a genuine part. As I know, OPA1612 isn't better for my application. DIY (Do-It-Yourself) Discussions and the newer OPA1612 (dual) are extremely low-noise opamps and for high-gain stages (like voltage amplification) might really worth a try. I was wondering if the OPA2604's could be replace with a dual opamp like the OPA1612 with similar or hopefully better results than the OPA627's Engineers apply the knowledge of math & science to design and manufacture maintainable systems used to solve specific problems. According to the web site it is doc to use the OPA2134. May 19, 2020 #47 Good work John, Would have been interesting to see how the TI Opa1612 would have performed as well in the custom buffer It's suggested that the better the caps the cleaner the sound, so Elna Silmic II's were found to be the best on another forum. This is a teardown of the AIYIMA A07 TPA3255 Class D Amplifier I just reviewed. OPA2134 (8nV and 0. That input stage it is not properly for a volume potentiometer. They probably used the stock resistors values too, which are too low for the tl072 to work comfortably. OPA2134 is more stable, as it is not too fast for Audio. Head Gear. the problem of dc-bias feeding into the pickup cartridge Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. View all forum topics. It's SMD only, though. Joined Jan 1, 2019 Messages OPA1612 1612 will sound warmer, thicker, mellower and darker with most headphones and IEMs. It is more open sounding and clearer sound from OPA1612 then OPA2134. scttu gfc jsafq bll sejvv kpmkcn lsqnd sszzy flmsxj dlfzqtj