Opa1656 sound reddit common mode voltage that I've measured on any op amp. 5amp (Aliexpress unit recommended by aiyima) and rolled op amps to OPA1656 . The OPA1655 is the single channel version of the OPA1656. This also will subtly change the sound. Nov 8, 2023 · Very happy with the sound of the amp, but I wanted to see if a positive impact could be made with OP-AMP changes. 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. 25 V to ±18 V (4. Now I use OPA1612 for i/v and LPF, distortion is gone but sound is flat. Anybody know beter opamp than OPA2604 with realistic "analog" like sound and good soundstage? (Without discrete opamp). On the α24, this is a non-issue. The knee in the OPA1656 noise curve is higher because the broadband noise of the OPA1656 is lower (2. OPA1656 sounded worst, Muses 8920 sounded best. I decided to make some prototype boards. Hi! Im new to op amps and was wondering if any of you have any recommendation for chips to replace the Beyerdynamic A1 ST MC33078N opamp. Jun 3, 2021 · My benchmark standard op-amp is the OPA1656 which is not the widest sounding, but it's tight, somewhat linear and has a good balance to the sound. Of course I would be delighted to find a new king, so open to suggestions! Jan 30, 2024 · For best performance you might chose the OPA1656 while with V7 you should get a slight increase in details and scene. I don't care about listening tests or something else, just want to use the technical better one in my amp. But it's a bit emotionally distant compared to MUSES03. It has the most stable input capacitance vs. 25V to ±18V or (4. Aug 23, 2022 · CANS: Dan Clark AEON 2 Noire SOURCES: Creative Nomad Zen Xtra, Samsung Galaxy S10, Samsung A71, Samsung Galaxy J3 Orbit IEM: Mangird Tea, Fiio JD10 DDC/LINE CONDITIONERS: Ifi USB-B iSilencer2 (USB-B AND USB-A), AUDIO-GD DI-20 HEADPHPONE AMPS: Audio-Gd Fun, Audio-Gd NFB-1, Audio-Gd NFB-10ES STREAMER: WiiM Plus Pro PORTABLE DAC-AMPS: O. Thanks in Jun 16, 2023 · Fosi seems to have chosen the first solution, so all sound has to go through those small sound-destroyers, and it is easy to hear. It has a style of sound that seems to evoke more emotion and make the music more enjoyable than the others. Oct 14, 2024 · The OPA1656 has a slightly warmer and more musical sound compared to the OPA1612. Haven't tried OPA1656 after that. This Purifi is made with good quality components and H2000 Case, made in Italy. I also use since it came out, the 828 as front end in Penasa' s Evolution amp, a composit power amp with dual 3886 buffer (current pump) in output. Altered text SYMATTR Value OPA1656 SYMATTR Prefix X SYMATTR SpiceModel OPA1656. The result is quite spectacular. 🤷‍♂️ Reading the other comments here, maybe buying a whole other amp would be better, but I alread Mar 17, 2019 · The OPA1641 would be slightly better. Great alternative to TPA325X / Hypex Ncore (this is subjective ) is the double Mono Merus amp. OPA1656 The data sheet for the OPA1656 says (on the front page, I only skim read it) that it can drive 100 mA, is low noise (2. Heretic : OPA1656 ∗ op-amp for voltage gain with local feedback, OPA1656 (6 stages per channel) as output buffers with local loops, no overall loop feedback. Footprint . 6v. Mar 30, 2025 · The OPA1656 has slightly better noise specs and can have slightly better RIAA accuracy due to its higher gain-bandwidth product, but it is also more prone to oscillations with awkward source impedances due to its high gain-bandwidth product and high differential input capacitance. The bass is definitely more detailed. My history with Burson Yes the Hel 2 will sound different since it uses an AKM 4490 dac versus a Cirrus Logic CS43131. The DAC chip itself is not usually the limiting factor, nor are the opamps by themselves. 0006%, 20Hz-20KHz, at 2V RMS IMD: <0. However, switching opamps can make for a different sound profile through differences in noise/distortion levels and other specs. 9038 recomendation is OPA1612, OPA1656 Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 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. OPA1656 - 2. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. Mar 17, 2019 · 2. Mar 17, 2019 · I would not suggest using an OPA1656 in a headphone application without a series output resistor. Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. Rather warm typed listening OPA1602 > Very analytic, quite straightforward to listen to and less colorful than the 1642. And opa1656 and opa1612 doesn't sound any different. It's a killer OpAmp, and better suited to Oct 14, 2024 · The OPA1656 has a slightly warmer and more musical sound compared to the OPA1612. Jul 4, 2009 · The Opa1652 and Opa1656 sound fantastic in those zishans I had both as buffers and they really brought out the best in driving my favorite op amps. Symbol . com with a TI insider involved. Despite being nothing special they are a great match for the amplifier boards. 1. This OPA1656 OPA from Texas Instrument offers very good performances for audio use. Members Online First from scratch mic build, AKG C12/414 capsule, JFET and transformed circuit based on u87 PCB. It's a killer OpAmp, and better suited to The Why: For those that know me, I am an incessant tinkerer, which is probably a big reason why I became a computer engineer. I would not classify the OPA1656 as a high speed amp in this context. Other suitable choices would be OPA1641 / OPA1642 or similar. Jul 4, 2021 · There are four adapters on each $2. Last the output on the Modi 3 through the OPA1662 and the Modi 3E/+ OPA1656. Ever since picking up audiophilia as a hobby a few years ago, that desire to tinker and modify the things I own (especially the electronics) spilled over into my audio gear. I'm looking for opamp better than OPA2604 witch big soundstage, and "analog" like sound? But e. i have a a07(tpa3255 also) with 48v 7. com) I have tested the The AIYIMA Tilear Rev 2. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. Also they are very hot. Yet I keep reading countless positive comments on the Muses and Sparkos. Impact on the XLR Channel OPA1656 in XLR: With the OPA1656, you’d get a more engaging and dynamic sound, which could work well if you use your Feb 19, 2019 · I tried my trusty opa1656 with otherwise stock op-amps in the V3 mono 5Amp PS, and what I heard was a noisy presentation. 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. Since your L/R channels already feature the Oracle II 02cohesive overall sound, complementing the Oracle II op-amps. Mar 17, 2019 · The good news is that in audio, impedance levels are relatively low so parasitics need to be larger to have a bad effect, and most audio opamps are not really high speed. In particular, it has very good dynamics and a low level of harmonic distortion. It has a very good dynamic range and a low level of harmonic distortion. OPA828 feels like the most technically correct presentation of the sound, done at a far higher level of quality than say LM4562. May 19, 2004 · In fact, I had put in Yanasan's dual 4499 dac the OPA1656 as I/V converter and the OPA828 as diff/ SE summing. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 9 nV/√Hz 的低電壓雜訊密度和 6 fA/√Hz 的低電流雜訊密度，從而在各種電路中實現超低雜訊的表現。 Topology: based on OPA1656/OPA1678 Gain: 0dB in absence of processing, up to 12dB with processing Output Impedance (line out): 75 ohms. May 20, 2021 · A30 PRO uses 10 OPA1656 op-amps in parallel plus an ultra-high-gain-feedback design for an outstanding power delivery, something that I’ve never seen at this size and weight. The high bias currents responsible for the high current noise will cause issues in many circuits with offsets too - pretty much every stage needs ac-coupling with that sort of bias. This feature accommodates the power supply constraints of many types of audio products. PCB is 100mm x 50mm Nov 6, 2024 · The OPA1656 contributes to the faithful reproduction of sound, playing a pivotal role in crafting intricate musical arrangements and immersive soundscapes. Jul 26, 2020 · Yes, here are my recommendations: 1) Replace your current fake* NE5532 Op Amps with real Op Amps like the OPA1656. Some soundstage improvement as well. That in itself will change the sound. 9nV/rtHz as opposed to 3. And after much playing around, I found that putting the IC farther away from the actual input was an improvement with noise. THD is just one of the metrics that are used to judge quality. Congratulations! It looks like a really good designs. These Jul 4, 2009 · As far the “warm” or “bright”, etc it is my belief that this is determined by how the op amp feature or highlight certain frequencies and how they tuned. just going by specs it should be better but i dont hear much, its def louder tho so if thats what you want May 21, 2023 · The 5532’s sound congested, with a dry “mechanical” sound in which music doesn’t flow quite as well, and doesn’t sound as alive as it will with better op-amps. opa627 (in dual), lt1028 (in dual), lm6172 is too much speed, and are unstable in my tube-opamp hybrid preamplifier. Supplied with the zero zone TPA3255 boards I used are the JRC 5532DD OP-AMPS. 1/f corners: OPA1612 ---- 10 Hz OPA1642 ---- 20 Hz OPA1656 ---- 1 kHz OPA2162 ---- 1 kHz Jul 4, 2009 · Of these top three my favorite is MUSES03. The FET-input architecture achieves a low voltage noise density of 2. The FET-input architecture achieves a low 2. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Home Sep 6, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. It's a jack of all trades so to speak, and this is the op-amp I was able to compare and contrast the V6 Classic to. I would check the amp out, if its character is basically to your liking (incl. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. 1M subscribers in the headphones community. Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. I bought the 2 Sparkos Labs Dual Discrete Op Amp SS3602's on sale and put in my A07 and I thought it made a big difference in clarity over stock. Getting a Dual Ak4490 mono portable player DAC will bump the specs per channel dbs but they are around 300+ and probably sounds better than many Ak4497eq single chip Mar 17, 2019 · Hi John, Currently kind of assessing the OPA1656 following your excellent thread(s) - very modestly in some line output stages of my HIFI. on LTSpice load, the lengthy lib update happend. Thanks! Jul 4, 2009 · on first sight i would say the opa627 has these attributes compared to the opa1656 - sounds somewhat thinner, voices sound more lean but at the same time a bit more sibilant - you could say its a bit more analog sounding - not so bass heavy as the opa1656 (the 1656 really shines in bass regions, specially infrasonics are much more "audible") Jul 4, 2009 · The biggest difference sound wise between the ak4497 and the ak4493 dacs is that the latter is less detailed but has more of bass-er sound with the sound being in the foreground. 49K subscribers in the diysound community. Input differential impedance at opa2156 is 100Mohm, like opa1656 😉 THD+N=-132dB at opa2156 and -131dB at opa1656 😀 Do you think it is not good for audio ? Both op amps are "brothers" with opa2156 a little more precisely and faster than opa1656. I reconnected the channels - now the right channel goes to both front ones, the left channel goes to the both AUX channels. Surround Frequency Response: -3dB at 7kHz THD: <0. OPA1655 和 OPA1656 (OPA165x) 是 Burr-Brown™ 运算放大器，专为音频和工业应用而设计，在这些应用中保持信号保真度至关重要。 FET 输入架构可达到 2. The little case is really cool, and congrats for soldering that good those little SMD components! May 6, 2022 · Good morning. Sound is very good, especialy a voice but sometimes I hear a little distortions. The OPA1656 operates over an ultra-wide supply range of ±2. I will have a listen to various op amps, old favourites and newer ones, from AD, LT and yours because your triggered my curiousity and all your efforts deserve it for sure. The bass violins sound much more like bass violins, not just something that adds bass notes. g. PRODUCTION DATA. asy using the ADA4627 as a template 3. 5 V to 36 V) on 3. Is the chip stable with output connected directly to the -ve terminal or is there a recommended feedback resistor? Not going to lie, the equation discussion on page 22 of the datasheet is marginally over my head. Mar 30, 2025 · Hello everyone, I decided to build my first RIAA phono stage, using OPA1656 and the schematic shown in the datasheet. Sep 18, 2021 · OPA1656 Pinout. Overall really love the sound compared to my older speaker setup I started with especially since I just recently got the SB1000 pro last week and am still trying to figure out all the DSP settings. Pete (Turion64) is right, selection of opamp requires synergy with the input cap. Mar 17, 2019 · Hi John, Currently kind of assessing the OPA1656 following your excellent thread(s) - very modestly in some line output stages of my HIFI. Feb 11, 2021 · Yes. There are lots of videos and forum posts of people comparing op-amps, and on this amp especially. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. . Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. A better place to discuss DIY speakers, headphones, amps, share plans and schematics, and link to… Cool. The OPA1656 is a Burr-Browntrade; operational amplifier (op amp) designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Modern opamps have seriously low noise/distortion levels that can let the sound come through better. The Japan Radio Corporation 4556 op-amp has a much slower slew rate of 3 V/µs since this op-amp was designed to make digital music sound more like amplifier gear from the 1970s. Mar 17, 2019 · Hi Johnc124 - I'm looking at building a simple unity gain buffer with the OPA1656. This OPA offers excellent performance for audio applications. The input is essentially shorted with 10mohm resistor in order to have a -140db control signal. Mar 3, 2023 · At the end of last year I was talking to Jim @6L6 about some project ideas, and the OPA1656 / BUF634A Headphone amp came up. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Years ago the MUSES 01 was $35 in Japan and it was at the time way ahead of it's time. 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. This is how sound engineers mix audio tracks. depends on the amp your using fosi makes a ton , assuming its the TB10D (upgraded version) with a tpa3255 it will just give you headroom that most people wont need. Of course there are a number of other factors to consider, like the ability to drive the input impedance of the following circuitry with low distortion Feb 17, 2023 · Both opa1656 and opa2156 are CMOS. As an aside, the use of a FET device as the input stage will also provide good RFI proofing. Elac Debut B6. I swapped to opa1622's as I had several sitting around and the noise was gone Tubes colour the sound as well by adding distortion. Quite a nice upgrade. 8nV/rtHz). 5. Of course this difference is more subtle than tubes. Do you have a preferred sound? I rutas suggestions depends on your preference. Ok, I know the dc offset is a result of each opamp chip's final laser trim and can/will vary. Personally I find running op-amps in class AB a bad idea since this inevitably creates crossover distortion and it is entirely up to GNFB to reduce this ugly kind of distortion, and GNFB becomes less effective in the higher frequency range. Some people claim swapping opamps can, at best, do nothing to improve the sound and, at worst, can cause oscillation. Strong points of the opa1656 chip were: better timbre of both voices and instruments, bold sound (which is really impressive). OPA1656 Pinout. The highs are also more detailed. Two identical gain 11 amplifiers were tested. Nov 11, 2024 · OPA1656 ( modern clean smooth sound, nice "deep" bass, which is "the" pro for me for this opamp ) OPA627 ( goes actually into the oldschool direction, it has similar attributes as the burson V6 vivid, but latter sounds more refined ) Jul 4, 2009 · In my particular amp, opa1692 has narrower sound stage than opa1656, as 1692 is designed for portbable use with trade-off (low power draw). Where possible, I tried to use 0805 smd components for resistors and capacitors (exclusively Thin Film and C0G/NPO), except for the two 100nF that decouple the power lines. There is basically no difference between njm4585 opa1612 and opa1656. On the other hand, the OPA1656 is a very popular op-amp which has a slew rate of 24 V/µs. OPA1656 will not have the flat, 5 ohm, output impedance of the OPA1622. Mar 5, 2020 · At first "sight" (listen), the Fosi V3 seems to be pretty decent. So I don't think there is a singular correct May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. 1pF for OPA1656: View attachment 1381659 View attachment 1381660 So, when the unterminated cable had an impedance peak in the region around 4Mhz that is near or even above the 47k local resistor the circuit might oscillate. The amp is fully balanced and opa1656 デュアル d (soic、8) (1) 利用可能なパッケージについては、データシートの末尾にあるパ ッケージ・オプションについての付録を参照してください。 Nov 1, 2024 · Currently it has the stock TI OPA1656 opamp installed. If you still want to maintain low closed-loop output impedance, there are a number of circuits that close the loop around the output resistor at audio frequencies. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. The Kefs q150s are great but some people find them bright and clinical. Audiophonics is proud to present its OPA line-up with the OPA1656 based on a authentic Texas Instrument chip. Except opa1656 rest of opamps are available on rsdelivers. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Good soundstage as well OPA1656 > The best, very holographic, ultra sharp and awesome soundstage, very equilibrated too Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects. So : you can "custom" your sound with your favorite DIP OP amps. This subreddit is for the budget minded audiophile that wants to grow out of soundbars, boomboxes, mini systems, portable bluetooth, lifestyle speakers, and PC peripheral branded audio solutions. 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. Mar 17, 2019 · The OPA1656 has 6dB more open loop gain at audio frequencies, hence the better distortion. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. This higher slew rate helps to make details sound more crisply defined. 2 or Canton GLE 20 ESS/A07 48v7. I have settled on 4x OPA1656 in my Burson headphone amp and 4x OPA1655 in my Ayon DAC. 9nV/√ Hz 的低电压噪声密度和 6fA/√ Hz 电流噪声密度，能够在各种电路内将噪声降到超低。 Jan 2, 2024 · 2) If you don't then think twice and look at cheaper and cooler-running alternatives like OPA1688, LM4562, OPA1656, ADA4625, OPA1612, OPA1642, OPA1652, OPA1662 and more (NE553x if you can still get them!). OPA1656 CAD Model. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. Added a new OPA1656. Also, a LME49720HA that costs 5 times as much as the PDIP or SMD version should also be interesting in terms of cost calculation. Assuming the voltage noise has a white and a 1/f part, which seems to be correct, for the total RIAA- and A-weighted noise, what matters is the noise around 1162 Hz. Impact on the XLR Channel OPA1656 in XLR: With the OPA1656, you’d get a more engaging and dynamic sound, which could work well if you use your The Japan Radio Corporation 4556 op-amp has a much slower slew rate of 3 V/µs since this op-amp was designed to make digital music sound more like amplifier gear from the 1970s. The Sparkos are somewhere in the middle. All things equal a great firmware that integrate with a high performance op amp with a wide bandwidth will sound ANYWAY you want. I built up a board last night and the sound is nice! Concepts considered for this prototype board included: Make it 100mm wide to slide into a Hammond chassis. Are you hearing any sort of channel compression, distortion or lack of low bass or bass definition with the HD700s? Next the dacs on the Modi 3 is AKM4490 and the Modi 3E the ESS ES9018. At the very least I can say it doesn't sound like night and day, like in my previous experience with the Aiyima T9 Pro. Film capacitors MKP2 2,2nF are replaced by wima FKP2. It's a big beautiful world out there! Yes the Hel 2 will sound different since it uses an AKM 4490 dac versus a Cirrus Logic CS43131. Nov 21, 2019 · Not great current noise alas, probably unsuitable for MM phono amps as a result, but look decent performers otherwise. This has been built and is my current phono amp in use on a regular basis. Jan 19, 2023 · Live Sound PA Systems Instruments and Amps. OPA1656 SoundPlus? ultra-low noise and distortion, Burr-Brown? audio operational amplifier. Amplifier: Bamboo V2 3E Audio 260-2-29A Stéréo REB B (OPA1656) 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, Apr 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. Detail and separation are fantastic, I was quite happy with them. Every amp. 9 nV/Hz and a current noise density of 6 fA/Hz Oct 31, 2020 · OPA1642 > Great sound stage, the most colorful of the three. There could be 2 solutions to this: Either to un-solder the two 5532 and to connect the unbalanced signal + to +, and ground the negative pin on the TPA3255, or to exchange the 5532 to some better ones, be it View community ranking In the Top 1% of largest communities on Reddit. If you like something neutral and slightly warm maybe go for the Q acústica 3020i ir 3030i that have a soft done tweeter. Even with that modest chip the soundstage is wider and higher. Basically, if you want better sound for your headphones from virtually any source—and we’re talking computers, tablets, game consoles, TVs, phones, heck, even CD players—and you also want to have crystal-clear voice communications from an external microphone (whether you’re talking to your raiding Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. Bass is also fairly one-note and lacks a bit of impact, and each instrument sounds less distinct in the 5532’s congested stage than they do with better op-amps. Currently rocking the BUF634AU in it. Feb 17, 2023 · Hello, guys. In the back of the title picture, just behind the DIY mechanical keyboard, you can see a Schiit Coaster tube hybrid amp in a crappy 3D printed enclosure, and next to the keyboard is my Topping NX4 DSD, which has also been modified with USB-C connectors, a swapped volume potentiometer with higher tolerance, and the op-amps in the low pass filter Nov 1, 2020 · Strong points of the Analog Devices chips were: the impressive clean and fast bass response, the decay of the notes which were clearly audible, the 3D sound-stage, bettering opa1656 sound-stage. 2. Sep 14, 2021 · In other news - I was browsing for "OPA627" as in just threw my line in the water and up came an ebay ad by a USA fella who had loaded all channels of his sound/mixing board way back when with the OPA627 and now didn't need the sound/mixing board so was selling off all of the DIP8 OPA627AP (qty roughly 38) for $39ea. 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 Nov 6, 2024 · The OPA1656 contributes to the faithful reproduction of sound, playing a pivotal role in crafting intricate musical arrangements and immersive soundscapes. OPA1656 swapped in to I/V and buffer on BF2 analog board. 3D Model. 5amp psu and opamps rolled from NE5532(people say they are fake anyways) to OPA1656. Dec 31, 2021 · Depends on at what frequency you look; noise-wise, the OPA1642 is better below 500 Hz and the OPA1656 above 500 Hz. Don't let yourself be fooled, both are excellent for audio. Mar 17, 2019 · Again, it's the circuit topology that is the most important to get the best sound out of any op-amp. I’d rec them to anyone rocking the z1! Just got the Zishan ak4495 today and just in stock its THE best sound one, I’ve tried in the series! Mar 17, 2019 · Many high-end audio manufacturers still use THT technology and avoid SMD at the sound-relevant points. OPA1656 are really good audio op-amp. We can answer that one, but it kinda breaks down by what you’re gonna use it for. 95 board. The amp is fully balanced and opa1656 デュアル d (soic、8) (1) 利用可能なパッケージについては、データシートの末尾にあるパ ッケージ・オプションについての付録を参照してください。 Sep 14, 2021 · I've built my own using the OPA1656 but did not find the proto boards be a good idea for trying opamps, so I started having boards made using ExpressPCB. Mar 17, 2019 · If you pick a point on the 1/f portion of the noise spectral density curve you can see that the two parts are essentially identical. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). It just was harsh. There is an overall improvement in clarity. The Audiolab 6000a, Yamaha AS series, Marantz PM6007 are good pairings also the Tangent Power Ampster mk2, Cambridge Audio CXA and AXA series, SVS Prime Wireless or even if you are on a tight budget you could try an Aiyima A07 Max (or two in monoblock) with an opa1656, Muses 8820 op amp upgrade which might pleasantly surprise you. Jul 26, 2020 · 2 X OPA1656 in my Aiyima TPA3251. 9-nV/radic;Hz Feb 17, 2023 · However, all the above having been said, swapping opamps is not likely to make a low-cost Aliexpress DAC sound all that much better. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. May 25, 2021 · HOW ON EARTH can the OPA1656 sound SO much better? Is the 1656 "better", or is it "right" and the other parts "insufficient"? Another observation: I built a little stereo signal summer which is a pair of simple unity gain inverting amplifiers (+/- 9 volt power, 47k feedback and 47k input, non-inverting input grounded, dc coupled, 3 inputs per Jul 11, 2022 · I would not equal best sound with lowest THD. What is OPA1656? The OPA1656 is an operational amplifier (op-amp) designed for audio and industrial applications where signal integrity is critical. 5a OPA1656/ ELAC B6 of his a/v system and Jul 4, 2009 · An update from me. Compared to the vintage Philips FA950 I have as reference, it doesn't sound that much different (if any, but more listening required to be fairly sure). I try all five opa1656 but the best sounding was using 2 opa1656 at the front and 1 opa1656 in the back, in the middle 2 opa2604 Opa1656 is the best I tried for Aiyima07 not Pro, the 2604 in that model meehhh Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. The SBX G6 has a dual mono push-pull discrete amp versus Hel2's 4 stages of TI OPA1656 opamps per channel. Most of the sound quality of a DAC is determined by the quality of the circuitry and quality of parts surrounding the DAC chip. Opa1656 inverted the left front and AUX channels at the input (I will explain later). Recording studio professionals have long appreciated gear that offers both reliability and delicate expression, trusting the OPA1656 as an essential piece in their toolkit. 25V min / CMOS LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link. I also designed my own headphones amp, and at the beginning I planned to go with an opa1656 but I ended up using discrete components. I routinely use OPA1656 and related on adapters without any issues. Your going from AKM famous Velvet Sound to ESS's more clinical and designer configurable sound. Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. The A07 is running with a 48v 7. 9nV / 53MHz / 24V/μs / 2. Dec 20, 2023 · I had ordered some opamps (OPA2134 and OPA1656) in the beginning to tinker with but after reading contradicting opinions decided to leave the original ones in. Dec 8, 2023 · I've modelled the input stage with an OPA1656, a very low current noise/low distortion FET op-amp. com and all are unity gain stable. Xduoo XD-05 and XDuoo XD-05 Plus ( w/ Burson V5i-D Op Texas Instruments 的 OPA1656 Burr-Brown 運算放大器專為必須維持訊號傳真度的音訊和工業應用而設計。 FET 輸入架構能實現 2. 9 nV / √Hz is pretty good), has a gain bandwidth product of 53 MHz, slew rate 24 V/us, and input offset of 1 mV max. 0006%, CCIR SNR: >114dB, A-weighted, referenced to 2V RMS Topology: based on OPA1656/OPA1678 Mar 17, 2019 · As long as OPA1656 is used within its application field, and musical flow and neutrality are key (eg one is not trying to colour the music, suggering or drying it), OPA1656 does indeed an excellent job that is difficult to beat (provided proper PS as ever). OPA1656 is a bit noisy at low frequencies. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. I have ordered some opamps chips now during covid to do some fun with for building pre designed pcb amps i have found online. Texas Instruments Burr-Brown Audio OpAmp OPA1656 SoundPlus™ ∗ using older alternative OPA1688 within 2019 teardown - Magni+ is very interesting for a discrete amp and at the price. Jan 12, 2021 · The filter m33078 is replaced by opa1656, by opa1662 subwoofers. G. They have an aluminum tweeter and that has a specific sound. The OPA2156 has amazingly good distortion as well, you just might want to load the output a little less than a 1656. Oct 12, 2020 · The AIYIMA Tilear Rev 2. Now you are able to audition the AD746 and the LT1124 and the AD8599 and the OPA2209 and the LME49723 and the OPA1656. The only drawback is the higher heat that needs to the dealt with, hence putting so many holes on all its sides. I think the problem I'm seeing with the OPA2156, and to a lesser extent the OPA1656 is that the 1/f knee for the noise is much higher than for the OPA1612 and OPA1642. 1 with great caps and some mod (OPA1656 / inductors update) sounds really good too. 5V to 36V) on 3. May 23, 2018 · The third time I added in njm4585 very cheap but pretty good opamp in the comparison. lib SYMATTR Value2 OPA1656 SYMATTR Description TI/BB Audio FET Opamp to get the same symbols as the ordenary Opamp 4. Mar 17, 2019 · The OPA1641 would be slightly better. With a wide supply voltage range and DIP8 mounting, it can replace many other models. 9mA of supply current. It wasn't noise in the sense of white noise or popping, or clipping. 2) Buy a real Meanwell 24v PSU, then adjust the voltage all the way down to roughly ~21. Today, I still have the same 2020 amplifier and the opa1656 sound much, much better at a fraction of the cost. I have diyinhk es9038pro board and try muses8920 for i/v and LPF. A place for discussion, news, reviews and DIY projects related to portable audio, headphones, headphone… Aug 22, 2007 · And no, I didn't perform any subjective listening tests to judge the perceived sound quality, so sorry, I can't provide any qualified audiophile journalistic waffle. The OPA1642 is “one step down” but still very highly rated, and it is JFET-input which should give a low enough DC-offset to be used directly in this kind of application. May 2, 2020 · Hi amigos, I propose this group Buy for a brand new Purifi Amplifier with a Custom Buffer using OPA1656 DIP8. For example, at 10Hz both parts are approximately 35nV/rtHz. Ideally would be to try out the V7 and see if there're any improvements in the output sound. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. But I guess that it is the overall level that is of interest. Below is a comparison between OPA1656 and OPA1642. Feb 26, 2025 · Features: All-in-One DAC Amplifier:Using the ES9038Q2M high-performance decoder chip, combined with the TPA3255 high-power ultra-low distortion amplifier chipset, the AIYIMA A80 supports DSD512 and PCM ultra-high-resolution audio, providing users with rich and delicate sound details. 3. (See diyaudio. I will try the OPA1656 again for Elna Silmic II caps. Well, if I was imaging all those above, then i was. My history with Burson 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. 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 Dec 4, 2020 · I'm using Nichicon Muse BP for the input caps, it adds bloom to the sound and sparkling highs which is not compatible with OPA1656 sound. Mar 17, 2019 · Here there are a number of options: BJT-inputs without bias current cancellation (OPA1622), Super-Beta BJTs (OPA2210), Low voltage noise JFET and CMOS (OPA1642, OPA827, OPA828, OPA1656/2156). Bipolar or FET or CMOS depends on application due to noise type. If I'd imagine, the njm4585 is a tiny little sticky sounding in the highs and less clean. 1 with the following OP amps : OPA1612 OPA627 OPA1656 Burson Audio V5I genuine Nov 17, 2024 · Quick sim to illustrate the above, using datasheet spec of Cin_diff of 9. qaojqh zbug zfidgt hmby kiebx fki noed faxktp bcof ncb