Opa1656 vs opa2134 forum. Goggle bill d mod carver c-1. Double blind AB, the TL074 circuit had audible hiss from the speaker, and the 2134 circuit did not. For my test circuit I am using: +/- 13. It was recently re-capped and all new guts put in . Jan 7, 2021 · So considering NE5532, LM4562 and OPA2134, OPA2134 gives best measured results in AIYIMA A07. Ini adalah salah satu Op-Amp FET input keluaran Texas Instruments yang masih anget karena kalo tidak salah baru keluar tahun 2019 kemarin. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. The OPA 627 is well over price and is bass heavy and it’s not worth the price you pay for it The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. It performs admirably in virtually all audio applications. It's best use as an alternative to opa1612 when noise is not a big concern. 5 volt supply, 100 nF and other bypass TI E2E support forums Nov 24, 2018 · I have to say that this opamp has a very well input stage symmetry which is better than opa1612, opa2156, opa1656, ADA4898, and many-many other opamps 3-4x more expensive. ••• Nov 28, 2022 · Part Number: OPA1656 Other Parts Discussed in Thread: OPA192 , , OPA551 , OPA547 , OPA593 Dear members: For a measuring circuit I need an operational with output TI E2E support forums Search Oct 8, 2023 · The advantages of the V3 compared to the MAX: 1. DC voltage (as shown on the front page). However, if you want the best possible stereo imaging and resolution with regard to phase critical stereo information, much lower distortion is in order. 1 and Orpheus Minotaur speakers Mar 28, 2022 · The OPA1656 can deliver 100 mA of output current, so it should be able to drive a headphone load. May 19, 2017 · 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 really doesn't give much 20 kHz added safe composite loop Sep 14, 2021 · 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. Two cases were evalutated – in a Jan 27, 2024 · The advantage of OPA1656 is that it has JFET inputs rather than bipolar, so its input bias current is much lower, making it easier to keep the output DC offset low in some applications. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. I can't say for sure. I've ordered some opa2604's from ebay still in transit to play with. +/- . Feb 11, 2021 · That was the circuit where the OPA2134 sounded better. (Came with the other DAC an Aune X8 XVIIIth. Stock V3 is just flat compare to stock A07, this is tested with Topping D30 and Whatmough Emotion 6. And it is a JFET opamp, which is always preferred by myself in the positions where slightly higher voltage noise of the opamp is negligible, like here. Feb 10, 2012 · The 5532/5534 is an excellent sounding and very durable work horse; the OPA134 series can be adequate too. I use one amp and I don't have any imbalance and it provides more power than what I need. Registration is free and required to post messages and view the file attachments. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. This device is ideal for low and high impedance applications, such as a high gain microphone pre-amplifier, due to the low voltage and current noise. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. Since I am not interested in the V6 Vivid Dual that it comes with. 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, low-noise 36-V JFET precision operational Apr 6, 2020 · The OPA2134 is very ordinary, I consider it a side step to the NE5532. Waktu dirilis, seri OPA165X ini digadang2 menjadi pengganti keluarga OPAX134. 7V 36V (34. the O2 dScope measurements that NwAvGuy posted. Nov 30, 2021 · The output swing for Aol should be considered as it is different between the two devices. I would check the amp out, if its character is basically to your liking (incl. I think I used TL072 in my KOT clone. May 15, 2022 · Buggle2 Riaa board. Every amp. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. I can't really hear difference this time. A quick snapshot of the OPA1656 performance specs: Sep 14, 2021 · Of the op amps in my collection the massive misbehavers are the OPA1656, the LME49990 and the OPA1612. Talking about AIYIMA A07, it will end up in a dustbin soon. Opa1656 has good phase response at high frequency. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. In the meantime we will wait for the customers feedback on the component values in order to check the stability of each op amp below using the OPA1656. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. My favorites at the moment opa1642 and this one opa1656. Though I use it only occasionally mostly for tests, and it has not operated more than a couple of hours summed, the right channel started to emit high frequency hiss noise time after time, without any special reason, even if nothing is connected to the input. I listened to OPA2134, LM4562, and NE5532, and OPA2134 sounded the best. Thanks in May 23, 2018 · The second time I did test with opa1656 and opa1612. Hi there probaly a simple question maybe not. Jan 28, 2018 · I had the chance to gather up a selection of opamps from my parts bin, including BB OPA2604, OPA637, AD823, LME49860, JR4556, Muses8820 and 8920, and compare them against each other along with a Burson V6 Classic (thanks to them for sending me an evaluation). ah so much other untested opa's 1678 still on my list ina1620. CMRR is not a big issue. I no nothing about this. Mar 21, 2023 · The trade off would be noise vs stability. It is a really nice-sounding chip in the right place, but man it is expensive and you can get nearly there for a lot less in trouble as well Oct 28, 2023 · Now I only need to recalculate my R13 / R2 values and if I should change them to something else than what I currently have for the OPA2134 (R13 = 6. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. I also have the 1612. 4 nV/rthz. Jun 20, 2023 · opamp rolling seems to be a must with V3, I settled with Muses02 after testing out Burson v5i, v6 classic, opa1656, opa2134. 8/-5. Below, I have highlighted the components that could be adjusted if this the issue. OPA1622 was targeted specifically for headphone applications, while OPA1656 is a more general purpose device meant to address analog signal processing in line level audio circuits. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• With that being said, there will not be a huge noise performance difference between OPA1656 (~4nV/rthz) vs OPA1678 (~5nV/rthz) when the thermal noise is already 11. Note that while the OPA1656 is unity gain stable, it does have an internal compensation circuit that causes a phase wobble in the 1-10 MHz region. May 7, 2018 · 2. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. com with a TI insider involved. Feb 2, 2024 · Part Number: OPA2134 I obtained some OPA2134PA DIP op-amps from a friend to test. Feb 1, 2006 · OPA2134 is a far easier drop-in replacement for the TL072. as well and I might try a opa2134 I have lying around. I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). FET on the OPA1688, but strangely it is actually higher at 10nV/sqrt(Hz). 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. PRODUCTION DATA. the default NE5532 OP amps supplied) and have - alternatively - a look at some of the rather "cheap" integrated OP amp alternatives, which fit the V3 sockets from Mar 17, 2019 · blue spectrum - 2 x 8 parallel OPA1642 , green spectrum - 2 x 2 parallel OPA1642 orange spectrum - 2 x 8 parallel OPA1656 , brown spectrum - 2 x 2 parallel OPA1656 Based on these measurements I expect the noise of a single OPA1656 to be 39nV/rtHz at 10Hz. May 19, 2017 · 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 really doesn't give much 20 kHz added safe composite loop 4 days ago · You might want to consider swapping in OPA1656 in all your locations after the PS reduction. . The voltage noise figure for the NJM4556A *should* be lower, being bipolar input vs. It may or may not sound at all noticeably better than a TL072, it depends on the circuit and application. OPA2134 is more stable, as it is not too fast for Audio. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. It's a killer OpAmp, and better suited to Mar 17, 2019 · Stupid question from newbie, have twelve OPA2134 in my amplifiers in dip8 container. I'm still waiting for OPA1656 in the mail. This is just a theory. 3V inside of each supply. When we developed the OPA1656, this was also a major design target for us, and the designer and myself spent quite awhile in the lab with previous CMOS audio op amps (specifically OPA1652 and OPA1688) hunting for sources of input capacitance variation. Dec 10, 2021 · This is my first time doing anything DIY with audio. Di salah satu gambar ada sedikit overview dan perbandingan OPA1656 vs OPA2134 yang saya comot dari datasheet-nya. One other device that would be worth looking into is the OPA1656 - it is only a dual but has lower wideband noise. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. OPA2604 is a little bit faster. Part Number: OPA2134 Other Parts Discussed in Thread: OPA1678, OPA1611, OPA1602, OPA1642. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. Mar 17, 2019 · Don't let power supply current limitations get in the way of performance. They'll say the OPA2134 "sounds dark" for example. Registration will only take a minute and registered users do not see any advertisements. Prodigy 205 points. Dec 6, 2018 · The diyaudio forum might be better suited for posing the question. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. Just getting a better (cheap) opamp worth it. Part Number: OPA1656. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety The advanced process technology here has flat capacitance vs. The opa1656 this time is smoother than the opa2156 in previous test and opa1612 has better bass than previous. My guess is that you won’t notice a difference. There are many dual opamps to choose from. 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, low-noise 36-V JFET precision operational OPA2134 is good but it consumes more power than normal (8 to 10 mA per IC) and it is not rail to rail output. We get lower current noise and better EMI resistence. The OPA1688 even beats it on noise. OPA1656 Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. com and all are unity gain stable. 8 mV 0. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and improve sound quality. Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. Same with the OPA627 though. This is a rarely needed parameter as I guess but some of the measurement tasks require that kind of symmetry, and I just bought 1K pcs of RT6863S to use that in the Cosmos 4 days ago · You might want to consider swapping in OPA1656 in all your locations after the PS reduction. But I really like the FET's in that position. Jun 20, 2023 · But no matter if they are original or not. I have a 1988 carver stereo per-amplifier. I've dialed back the tube volume some which reduced the bloated sound stage to a bit more normalcy. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. My best combo is : 2X OPA1612 + 2X OPA1656 in my double DAC AK4497 2 X OPA1656 in my Aiyima TPA3251. 5V 40V (39V) for the OPA1656. Mar 17, 2019 · To start, OPA1656 is definitely not a replacement for OPA1622, the two parts were designed for with very different applications in mind. There are many cheap opamps to try. Use a socket and try a few out. Those are fine. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. MUSES8820 is the best, IMHO. Volume control on the V3 is more subtle control over lower volumes. Other Parts Discussed in Thread: OPA2134, OPA2604. 5 metre cable at 33. Now all the folks are using opa2134 op -amps as the replacement. After you have completed the online registration Feb 11, 2021 · looks very similar to the eighth image from post #2 of Bel Canto's S300i/S300iu - driven by dual mono Icepower amplifier modules with switch mode power supply - go to Inside the Bel Canto S300i integrated amplifier | Audiokarma Home Audio Stereo Discussion Forums and Bel Canto e. 19k, R2 = 1k) to accomodate the OPA1656s To my understanding, the OPA2134 has a max supply voltage of +/- . Best Regards, Chris Featherstone Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Sep 18, 2021 · The OPA1656 is a high-voltage CMOS with the lowest voltage noise in the industry. I tried the 1656 in there but didn't feel it added anything. Composite amplifier is one of the best application with opa1656. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. 3 mV 0. 0026% LM4562 (DIP, Blue trace) -1,2/+2. OPA2604 is one of the few op-amps having +24 -24 max supply voltage. Aug 22, 2007 · I had a Rotel RA-930AX at hand which I had recently upgraded, reduced the opamp supplies to +/-16. OPA1656 1/2 OPA1656 Input Output Pad Product Folder Order Now Technical Documents Tools & Software Support & Community 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. Mar 17, 2019 · 3. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. It's hefty output current and rail-to-rail output swing will recover (more or less) all your lost swing due to the lower PS voltage. On the α24, this is a non-issue. I use two OPA1656 in parallel in the HP-2. One S300iu integrated amplifier | Stereophile. Sep 21, 2015 · The THD+N of the 1688 should be better too, best I can tell comparing the datasheet graphs vs. Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. The OPA1656, OPA1612 (the ones I'm currently using) or a low noise NE5532AP (if you really like the sound from the stock opamps). It'll struggle a bit with 33 Ω load, though. Op amps are super cheap. Double-blind AB we also preferred the OPA2134 at the listening position, especially with the EQ in heavy use. Aug 20, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. common mode voltage that I've measured on any op amp. Can I just swap it on OPA1656 with just a dip8-soicd switch? The system with active crossovers, so one channel of amp amplifiers some frequency range, each channel have 3 OPA2134, one for gain, and other 2 I dont know. OPA1642 is its replacement despite the lower type number. OPA2134 and NE5532 both have power supply currents of about 4mA per channel, and have been widely adopted in the market (understatement). Are there any other opa1655 , opa1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, Mar 17, 2019 · That's interesting, because in my little opamps rolling experiment it did not do very well. Except opa1656 rest of opamps are available on rsdelivers. It is difficult to say which one is better. Again, from known dealers or vendor like Digikey or Mouser, not Ebay or Aliexpress Sep 6, 2024 · Welcome to the DIY Audio Projects Message Forum. It offers exceptional performance in almost any audio application. It has the most stable input capacitance vs. Mar 17, 2019 · The OPA1641 would be slightly better. Two identical gain 11 amplifiers were tested. Question 1: yes, positive L and positive R are the right terminals for mono. Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. Just did an A/B with 2 opamp buffers on my Hypex NC500 monoblocks, which I normally use with no buffer, as the dac has enough gain to drive the NC500 modules direct. just replaced my already very good opa2134 on my dac analog pre-output with the opa1656, and not only it keep warmness of the opa2134 but feeds more details to my Naim amp hifi system , which is amazing ! so one more time thx G. +Gain Bandwidth. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. I agree with you, OPA1612 is really good regarding details resolution, OPA1656 has the best of both world : ultra high definition regarding micro details and very neutral but still warm. Mar 17, 2019 · Hi, Would like to thanx Johnc124 for all the good advices , and all members to this thread. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. 5, Orpheus Aurora 2. That seemed like a reasonable target for the supply current of the OPA1656 as well. 3. If you do use the '56 in the headphone amp section, reduce R310 to like 50 Ohms or so. com In no case did I have too high expectations regarding the sound Jul 26, 2020 · I own many OP Amps. 6V) vs. Nov 8, 2006 · OPA2134 and OPA2604 are very close in data. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Probably the circuit is better than the first one or something went wrong or I was just imaging all of those. I would say it depends on what circuit. So between the two, the OPA1644 is the better choice. 4Vdc and then sequentially put in the dual audio opamps which I happened to have in my inventory into its preamp stage socket: Total amp DC offset and THD LME49720 (TO-99, Green trace) -1. 3 MHz. Aiyima have confirmed they are the same analog linear potentiometer as the V3 but the sensitivity of the A07 MAX is twice that of V3, so while the A07MAX volume is nicer than previous Aiyima Amps but IMO the volume on the V3 is slightly nicer and it is very subtle with lower May 13, 2015 · NE5532 is dual channel opamp, so you can try few of these: opa2134, LM4562, opa1642, opa1656 without burning too much money on rolling opmaps. Load was 1k but I'm planning on changing that to something easier like 2k and retesting NE5532 just for fun. Don't let power supply current limitations get in the way of performance. The FET-input architecture achieves a low 2. However, there really will be very little difference between it and other high performance opamps. I don't care about listening tests or something else, just want to use the technical better one in my amp. It needs an adapter though. ygrivhdimhtmzhjlqklyxfvptqdfcufyecxzzynamiztqdpjloysmhggfllaq