Opa1656 vs opa2134 forum. 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. Jan 7, 2021 · So considering NE5532, LM4562 and OPA2134, OPA2134 gives best measured results in AIYIMA A07. Now all the folks are using opa2134 op -amps as the replacement. Question 1: yes, positive L and positive R are the right terminals for mono. 0026% LM4562 (DIP, Blue trace) -1,2/+2. I would check the amp out, if its character is basically to your liking (incl. That seemed like a reasonable target for the supply current of the OPA1656 as well. Mar 17, 2019 · The OPA1641 would be slightly better. 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. Mar 17, 2019 · Hi, Would like to thanx Johnc124 for all the good advices , and all members to this thread. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. 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. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 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. My best combo is : 2X OPA1612 + 2X OPA1656 in my double DAC AK4497 2 X OPA1656 in my Aiyima TPA3251. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. 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. DC voltage (as shown on the front page). 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. ••• 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. This is just a theory. Volume control on the V3 is more subtle control over lower volumes. One other device that would be worth looking into is the OPA1656 - it is only a dual but has lower wideband noise. OPA2134 is more stable, as it is not too fast for Audio. 8 mV 0. 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. 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. I use two OPA1656 in parallel in the HP-2. 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. Double-blind AB we also preferred the OPA2134 at the listening position, especially with the EQ in heavy use. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. 6V) vs. Aug 22, 2007 · I had a Rotel RA-930AX at hand which I had recently upgraded, reduced the opamp supplies to +/-16. com and all are unity gain stable. Stock V3 is just flat compare to stock A07, this is tested with Topping D30 and Whatmough Emotion 6. 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. 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. 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. 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. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. com with a TI insider involved. OPA1642 is its replacement despite the lower type number. Registration is free and required to post messages and view the file attachments. So between the two, the OPA1644 is the better choice. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. For my test circuit I am using: +/- 13. Di salah satu gambar ada sedikit overview dan perbandingan OPA1656 vs OPA2134 yang saya comot dari datasheet-nya. 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. My favorites at the moment opa1642 and this one opa1656. Nov 30, 2021 · The output swing for Aol should be considered as it is different between the two devices. 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. 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. Load was 1k but I'm planning on changing that to something easier like 2k and retesting NE5532 just for fun. Sep 21, 2015 · The THD+N of the 1688 should be better too, best I can tell comparing the datasheet graphs vs. Op amps are super cheap. Registration will only take a minute and registered users do not see any advertisements. 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. The OPA1656, OPA1612 (the ones I'm currently using) or a low noise NE5532AP (if you really like the sound from the stock opamps). I've dialed back the tube volume some which reduced the bloated sound stage to a bit more normalcy. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. 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. +/- . 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. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. Two identical gain 11 amplifiers were tested. Except opa1656 rest of opamps are available on rsdelivers. 3 mV 0. Dec 6, 2018 · The diyaudio forum might be better suited for posing the question. I listened to OPA2134, LM4562, and NE5532, and OPA2134 sounded the best. OPA2604 is a little bit faster. Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. May 7, 2018 · 2. Those are fine. 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. They'll say the OPA2134 "sounds dark" for example. 8/-5. Prodigy 205 points. Feb 1, 2006 · OPA2134 is a far easier drop-in replacement for the TL072. It is difficult to say which one is better. +Gain Bandwidth. Same with the OPA627 though. It offers exceptional performance in almost any audio application. 5, Orpheus Aurora 2. 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. OPA2134 and NE5532 both have power supply currents of about 4mA per channel, and have been widely adopted in the market (understatement). I also have the 1612. It performs admirably in virtually all audio applications. Probably the circuit is better than the first one or something went wrong or I was just imaging all of those. Below, I have highlighted the components that could be adjusted if this the issue. It needs an adapter though. 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. 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. 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. 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. Best Regards, Chris Featherstone Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. It may or may not sound at all noticeably better than a TL072, it depends on the circuit and application. 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. 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). It's best use as an alternative to opa1612 when noise is not a big concern. Mar 21, 2023 · The trade off would be noise vs stability. Nov 8, 2006 · OPA2134 and OPA2604 are very close in data. It'll struggle a bit with 33 Ω load, though. The OPA1688 even beats it on noise. 19k, R2 = 1k) to accomodate the OPA1656s To my understanding, the OPA2134 has a max supply voltage of +/- . 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. Feb 2, 2024 · Part Number: OPA2134 I obtained some OPA2134PA DIP op-amps from a friend to test. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Part Number: OPA1656. (Came with the other DAC an Aune X8 XVIIIth. But I really like the FET's in that position. Mar 17, 2019 · Don't let power supply current limitations get in the way of performance. I can't really hear difference this time. I'm still waiting for OPA1656 in the mail. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. Part Number: OPA2134 Other Parts Discussed in Thread: OPA1678, OPA1611, OPA1602, OPA1642. Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. the O2 dScope measurements that NwAvGuy posted. Every amp. 3V inside of each supply. Mar 17, 2019 · 3. My guess is that you won’t notice a difference. Goggle bill d mod carver c-1. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. 4 nV/rthz. 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. MUSES8820 is the best, IMHO. 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. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 3. Use a socket and try a few out. PRODUCTION DATA. Other Parts Discussed in Thread: OPA2134, OPA2604. Waktu dirilis, seri OPA165X ini digadang2 menjadi pengganti keluarga OPAX134. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. com In no case did I have too high expectations regarding the sound Jul 26, 2020 · I own many OP Amps. Opa1656 has good phase response at high frequency. If you do use the '56 in the headphone amp section, reduce R310 to like 50 Ohms or so. The voltage noise figure for the NJM4556A *should* be lower, being bipolar input vs. 5V 40V (39V) for the OPA1656. Aug 20, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. OPA2604 is one of the few op-amps having +24 -24 max supply voltage. I have a 1988 carver stereo per-amplifier. Dec 10, 2021 · This is my first time doing anything DIY with audio. 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. ah so much other untested opa's 1678 still on my list ina1620. Don't let power supply current limitations get in the way of performance. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Double blind AB, the TL074 circuit had audible hiss from the speaker, and the 2134 circuit did not. However, there really will be very little difference between it and other high performance opamps. as well and I might try a opa2134 I have lying around. FET on the OPA1688, but strangely it is actually higher at 10nV/sqrt(Hz). CMRR is not a big issue. I can't say for sure. I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. common mode voltage that I've measured on any op amp. 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. Jun 20, 2023 · But no matter if they are original or not. 3 MHz. I don't care about listening tests or something else, just want to use the technical better one in my amp. We get lower current noise and better EMI resistence. There are many dual opamps to choose from. The opa1656 this time is smoother than the opa2156 in previous test and opa1612 has better bass than previous. OPA1656 Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. Since I am not interested in the V6 Vivid Dual that it comes with. May 15, 2022 · Buggle2 Riaa board. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. I no nothing about this. On the α24, this is a non-issue. The FET-input architecture achieves a low 2. Hi there probaly a simple question maybe not. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. It has the most stable input capacitance vs. Composite amplifier is one of the best application with opa1656. 5 metre cable at 33. I think I used TL072 in my KOT clone. I tried the 1656 in there but didn't feel it added anything. I would say it depends on what circuit. 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. I use one amp and I don't have any imbalance and it provides more power than what I need. However, if you want the best possible stereo imaging and resolution with regard to phase critical stereo information, much lower distortion is in order. It was recently re-capped and all new guts put in . 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. 7V 36V (34. Just getting a better (cheap) opamp worth it. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. 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. Ini adalah salah satu Op-Amp FET input keluaran Texas Instruments yang masih anget karena kalo tidak salah baru keluar tahun 2019 kemarin. Talking about AIYIMA A07, it will end up in a dustbin soon. 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. Feb 10, 2012 · The 5532/5534 is an excellent sounding and very durable work horse; the OPA134 series can be adequate too. 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. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. Feb 11, 2021 · That was the circuit where the OPA2134 sounded better. Thanks in May 23, 2018 · The second time I did test with opa1656 and opa1612. 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. One S300iu integrated amplifier | Stereophile. . 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. There are many cheap opamps to try. I've ordered some opa2604's from ebay still in transit to play with. nxdevs dqzv awunpld zqiocnvv gicgm juisj nxa zcua gza mspfgk