Opa1656 review forum audiophile. When linux will have had their affaires cleaned up, i'd consider it, most probably Ubuntu. It offers exceptional performance in almost any audio application. 0006%, CCIR SNR: >114dB, A-weighted, referenced to 2V RMS Topology: based on OPA1656/OPA1678 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. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. At least -120db thd performance. 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. Since I am not interested in the V6 Vivid Dual that it comes with. Measured at non-inverting gain 40dB and 3. 4Vp-p output. Noise is roughly around 3-4nV. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. Quite impressed with them. 9nV/rtHz broadband voltage noise. OPA627 is really bass forward but you lose details, clarity and energy. That's Luxman, which has been around since 1925. 5, not a 2, but from the review notes and cursory visual inspection, the major differences seem to be:-balanced input (this almost certainly goes into a bal->se converter before the gain stage, as the gain stage is unlikely to take balanced input. Feb 13, 2016 · Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. OPA1656 Talking about AIYIMA A07, it will end up in a dustbin soon. >100mA output current. Most of the rest prefer amplification from the likes of Pass Labs whose amps are not especially low in THD but have notably high 2nd and/or 3rd order harmonics. CMRR is not a big issue. Since the 3rd and 4th stage noise is so insignificant, a low noise op amp such as the OPA1656 provides no benefit there. I felt a great improvement overall. This ready-to-use version is designed for audiophiles needing a foolproof amplification solution. He did measurements to verify that it was stable Feb 23, 2019 · This is a set of measurements of 19+20kHz IMD distortion of the following opamps: AD4627, ADA4898, AD8597, OPA140, OPA141, OPA1641, OPA209, OPA1611, OPA637, NE5534. The folks are predominantly tube amplification enthusiasts, a fair portion of whom really like SET amps. 1 is now ready with OPA1656 in DIP8 socket. But I would still like to see the OPA1656 tested. The low voltage noise combined with the low current noise make this device great for low and high impedance applications such as a high gain microphone pre-amplifier. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, analytical and non-intrusive (as compared to the bold NE5532) is what I would describe this opamp as. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Aug 21, 2024 · At only $279, the Schiit Saga 2 Preamplifier claims to be the best volume control in the world. 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. 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. Composite amplifier is one of the best application with opa1656. You retrieve so much details and trebble extension but could be a bit fatiguing. Jul 18, 2019 · Certainly this is consistent with my personal exposure to subjectivist audiophiles. May 23, 2018 · The first and obvious conclusion: we must avoid the audiophile Burson Audio V5. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. 53 MHz gain bandwidth product, 24V/us slew rate. Sep 7, 2023 · People claimed that OPA1612 measured slightly better than OPA1656 in the DIY Audio thread I linked, but that people seem to prefer the sound of the 1656. (46V/13A or 51V/11,5A) Now that we know the measurements of the 3E Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. The price? $299. I have them measured ln violectric v200 and gain stage of o2. The output swing for Aol should be considered as it is different between the two devices. The FET-input architecture achieves a low 2. 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. Spec : Fully balanced Dual 1ET400A Purifi modules Hypex SMPS1200A400 PSU Neutrik XLR inputs Sommer Cables Germany Custom Buffer OPA1656 DIP8 Second alu plate for heat dissipation Buffer Spec : - THD: 0,00026% @ Vin 2 Sep 7, 2023 · In the first image there is a OPA1656 used, in the second image it is the SI 994; @amirm tested this Apollon model with the OPA1656 ; OPA1612 (edit); EDIT: the default TI OPA1612 op-amp was in this sample Mar 28, 2022 · The OPA1656 can deliver 100 mA of output current, so it should be able to drive a headphone load. Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. There are many reviews of audio hardware and expert members to help answer your questions. Every amp. common mode voltage that I've measured on any op amp. Are there any other Jun 20, 2023 · But no matter if they are original or not. It'll struggle a bit with 33 Ω load, though. V6 vivid measured superb tho. 3V inside of each supply. *****!!! ROLL THE OPAMPS !!! Reviewed in the United States on July 6, 2021 Size: A07+DC 32V Power AdapterVerified Purchase A pair of *genuine* OPA1656's is the consummate and necessary upgrade for it's stock NE5532 opamps. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. Sep 14, 2021 · Yes, the low pipe organ pedal notes down 'round 20Hz are rolled-off at 20dB/decade below that of the mid-band 1KHz level during the cutter/mastering process. On the α24, this is a non-issue. I have a conjecture that some people's perceptions of sonic differences are caused by unstable audiophile devices being incorrectly sensitive to HF and RF noise on their inputs. He replaced five OPA1642s with them in an audio active crossover, convinced that they would be equivalent (after reading their datasheets), and that this would improve performance. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. I looked at the Slew Rate as my main Apr 29, 2024 · Yes, you are right, I'm quite new to this forum but not to audio ;-) Yes, I am a (small) 100% independant company, and I offer services (mostly related to audio measurements but my key knowledge is software development and DSP). 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. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. I would check the amp out, if its character is basically to your liking (incl. Opa1656 has good phase response at high frequency. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. -opa1656 replaces opa1652 in the gain stage May 2, 2020 · Best price in Europe = Audiophonics = 1500 euros without OPA1656 ) My price : 999 euros with OPA1656 if I sell at least 4 units. May 20, 2024 · Hi Amigos ) As promised, I remain faithful to my Diyer position ) After my dual Mono project "Bamboo" I return to the scene with a new project "Micro Bamboo" to pay tribute to Micro Audio and its audiophile grade SMPS630-SO PSU. Mar 17, 2018 · Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. 2024 has been a strange year in the high-end audio category. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. I did an A/B comparison to LME47920 (metal cans), burson V5i, V6 and also the Sparkos Pro discrete op-amps on one of my DAC's. Entry-level and mid-tier products that offer excellent performance and value for the money have actually struggled in the market, whilst ultra Mar 17, 2019 · I purchased 10 OPA1656's. Joined Nov 8, 2018 share a test between OPA1612 and OPA1656. Aug 25, 2023 · Noise above the audible range may affect downstream badly designed items. Aug 20, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. 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. Transparency got way better. Aug 20, 2021 · Interesting to have composer peers on this forum. 5Vrms signal, 80-kHz measurement bandwidth. Two identical gain 11 amplifiers were tested. com May 25, 2020 · What about a solution consisting of, for example, OPA1656 + LME49600? The former should be the TI flagship opamp with an even lower THD figure, the latter a current buffer with better slew rate and THD Feb 24, 2019 · WANTED: Happy members who like to discuss audio and other topics related to our interest. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Jan 17, 2022 · I posted it elsewhere as I did this experiment in May 2021 and want to share my experience. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. But it's just a theory. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. Soundstage and placement felt more solid. There are many dual opamps to choose from. Jul 4, 2009 · Marketing 101 by having one of the engineers on the diy threads because it creates interest (especially from spec crazy diy-ers who “need” the lastest and best specs and use “word of mouth” via the audiophile threads to push cost up by popular demand) They do outsource them to official distributors ie Mouser, Digi-Key but you have to buy them in bulk (we’re talking 100s to 1000s) and 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. I think it's a matter of circuit design and implementation. Mar 17, 2019 · Last week TI put a preliminary datasheet online for the OPA1656, a low noise, very low distortion op amp targeting audio applications and fabricated in a CMOS process. Dec 21, 2022 · At $299, it still sports a 32-bit microprocessor for USB input, an Analog Devices SHARC DSP running our own digital filter, and an Analog Devices AD5547 DAC, together with an output stage combining one of the best op-amps around, the OPA1656, with discrete JFET buffers. Dec 6, 2018 · Newer so-called audiophile op-amps have a higher bandwidth, than the traditional ones, so are more sensitive to board layout and can easily oscillate. And maybe change out some capacitors and resistors. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. I had no oscillations or instability with the OPA1656. That's stereo, which was first published in 1963 -- just Sep 17, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. Aol 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, May 2, 2020 · Hi amigos, New Purifi Buffer in V2. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. -131 dB THD+N at 1kHz, 600 ohm load, 3. My OP1656 OpAmp Review. Jan 2, 2020 · I only have a 2. Even a TL072 would not increase noise significantly, and a bipolar amp such as the NE5532 would be even better from a noise/cost perspective. Mar 30, 2023 · Topology: based on OPA1656/OPA1678 Gain: 0dB in absence of processing, up to 12dB with processing Output Impedance (line out): 75 ohms Surround Frequency Response: -3dB at 7kHz THD: <0. I have these 3 amplifiers and am curious how they compare in my environment. Apr 8, 2021 · I tried OPA1622, OPA627 and OPA1612 at I/V stage and OPA1612 is clearly the best to my ears. If a circuit isn't designed for such a high bandwidth op-amp, then blinding replacing the op-amp with a faster one is asking for trouble. I found the Bass being sweeter, the fact you can juggle the equalizer is really fine and brings something very interesting. Now take one of the oldest audiophile magazines in Japan. Review. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. The main problem, and that is tied to the topics on this forum, is that even stereo audio is becoming Oct 22, 2020 · I found your review of the BRZ TPA3255 from May 2020 in the diyaudio forum and there you praised it and said it's dead silent. I wasn't compensated by anybody in any way. Amplifier: Bamboo V2 3E Audio 260-2-29A Stéréo REB B (OPA1656) Apr 29, 2024 · Forum: Amplifiers, Phono preamp, and Analog Audio Review "Micro Bamboo Project" : 3E Audio 260-2-29A Stereo amplifier + Micro-Audio PSU Hi Amigos ) As promised, I remain faithful to my Diyer position ) After my dual Mono project "Bamboo" I return to the scene with a new project "Micro Bamboo" to pay tribute to Micro Audio and its audiophile Nov 24, 2022 · The opa1656 goes well in the A07 Max. the differences aren't huge, but big enough to make a change worthwhile. This reduces the chance of corrosion from water ingress & ionic contamination, such chlorine on the metal bond pads and bond wire interfaces. Aug 26, 2020 · I pasted below my review of the A07 from earlier this month. Several reference are used on forum. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. Then, there remains the lack of sound library choices, a lot less than those recorded for windows. 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 9, 2019 · Home: RME ADI-2 Pro FS R BE—Neumann KH80 DSP, Arendal Sound 1723 1S Work from Home: JDS Labs Atom—Etymotic ER4SR, AKG K371, Sennheiser HD820 Measurement: Earthworks M30 (Reed R8090)—Earthworks ZDT 1021 — RME ADI-2 Pro FS R BE — REW The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I don't care about listening tests or something else, just want to use the technical better one in my amp. 6 fa/rtHz broadband current noise. Dec 7, 2023 · There are many reviews of audio hardware and expert members to help answer your Forum Donor. Again, from known dealers or vendor like Digikey or Mouser, not Ebay or Aliexpress May 2, 2020 · Double DAC AK4497 with OPA1656 / OPA1611 High end 2. Nov 8, 2022 · I also plan to change the opamps (I currently use LM833), probably do some tests with an OPA1656, and modify the 78xx/79xx for something less noise. 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. Modi Multibit 2 is available now at schiit. Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Feb 2, 2019 · To compare : OPA1656 bring the Bursons V5I to their knees as well and keep in mind : Burson V5I = $70 vs $10 for OPA1656 OPA1656 is a ultra low noise fet operational amplifier and delivers a low distortion of 0. in order to resurrect those signals the preamp applies a maximum gain of 1000 b/c the basic mid-band gain must be ~ x100. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. It has the most stable input capacitance vs. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). The idea of this group buy is to propose a full pack @fair price for a brand new Purifi Buffer : SPEC : - THD: 0,00026% @ Vin 2,5 V RMS - GAIN: 14 dB - BANDWIDTH: 2 Hz - 150 kHz - SLEW RATE: 24 V/uS - CMRR 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. Dec 10, 2021 · This is my first time doing anything DIY with audio. It's best use as an alternative to opa1612 when noise is not a big concern. 1F X7R on the backside with the shortest possible lead length. Mar 17, 2019 · The main reason for using metal cans was to get a hermetically sealed package & reduction of die surface stress. . It is important to use the OPA1656 in both the first and second stages. "With the 4 OPA1656, compared to the AIYIMA TPA3251. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. 000035% (–129 dB) at 20 kHz If you love the OPA1612 you will love the OPA1656 too. 5 Floor Speakers with Ribbon Tweeter (93DB / 100W RMS) Source : LGV30 + HD Audio playlist Main connection : BT Aptx HD Amplifiers : Jlester TPA3255 + Genuine Muse 02 OP amps (see my review) Shui Yuan TPA3255 with caps mods + OPA1656 (see my review) Hypex Ncore NC500MP Dual Mono Jan 15, 2020 · Luxman LXV-OT10 Phono Equalizer Amplifier Review/Measurements Let's take an audio company with nearly 100 years of history. I used 10 or 12 in my preamp rolling project - never a problem with The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I use two OPA1656 in parallel in the HP-2. Either way, I believe both are more transparent than the NCx500ST, so besides subjective preference it shouldn’t matter. Equipment setup: CD/SACD player: Oppo BD105 Stereophile’s Test CD2 , Track 15 pink noise, , for sound pressure level matching th Dec 6, 2018 · Newer so-called audiophile op-amps have a higher bandwidth, than the traditional ones, so are more sensitive to board layout and can easily oscillate. Tried putting in opa1612 today. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP 1612 - LM4562 Mar 17, 2019 · The OPA1641 would be slightly better. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Desire to learn and share knowledge of science required. Just getting a better (cheap) opamp worth it. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Feb 17, 2020 · We are proud to present AUDIOPHONICS HPA-S400ET, a class D stereo power amplifier based on two PURIFI 1ET400A modules. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. This gave me a chance to The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I am considering the Muses 01 which is reputed to be a cleaner opa1656…. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. PRODUCTION DATA. Nice, clear and punchy with good leading edges on the notes and firm bass. 0006%, 20Hz-20KHz, at 2V RMS IMD: <0. Mar 21, 2023 · One of our customers recently bought several OPA1656 directly from us. umqhgehjpvhlcnpdksusxgzxucxbgzgafdjvvfbaadproufmhwygeth
