Opa1656 review forum audiophile

Opa1656 review forum audiophile. Aug 20, 2021 · Interesting to have composer peers on this forum. "With the 4 OPA1656, compared to the AIYIMA TPA3251. 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. 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. Transparency got way better. But I would still like to see the OPA1656 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. 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 them measured ln violectric v200 and gain stage of o2. 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. Feb 13, 2016 · Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. 53 MHz gain bandwidth product, 24V/us slew rate. I have these 3 amplifiers and am curious how they compare in my environment. >100mA output current. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. -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. I found the Bass being sweeter, the fact you can juggle the equalizer is really fine and brings something very interesting. Noise is roughly around 3-4nV. I think it's a matter of circuit design and implementation. 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. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. 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. -131 dB THD+N at 1kHz, 600 ohm load, 3. 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. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. Several reference are used on forum. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Every amp. 3V inside of each supply. 4Vp-p output. 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. 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. 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. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). 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. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. When linux will have had their affaires cleaned up, i'd consider it, most probably Ubuntu. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. Nice, clear and punchy with good leading edges on the notes and firm bass. It'll struggle a bit with 33 Ω load, though. That's Luxman, which has been around since 1925. I am considering the Muses 01 which is reputed to be a cleaner opa1656…. Either way, I believe both are more transparent than the NCx500ST, so besides subjective preference it shouldn’t matter. And maybe change out some capacitors and resistors. Since I am not interested in the V6 Vivid Dual that it comes with. Dec 7, 2023 · There are many reviews of audio hardware and expert members to help answer your Forum Donor. 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. 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. 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. *****!!! 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. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. On the α24, this is a non-issue. This reduces the chance of corrosion from water ingress & ionic contamination, such chlorine on the metal bond pads and bond wire interfaces. 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. Are there any other Jun 20, 2023 · But no matter if they are original or not. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. 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 use two OPA1656 in parallel in the HP-2. . LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. 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. 9nV/rtHz broadband voltage noise. CMRR is not a big issue. The FET-input architecture achieves a low 2. Joined Nov 8, 2018 share a test between OPA1612 and OPA1656. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. Tried putting in opa1612 today. Opa1656 has good phase response at high frequency. common mode voltage that I've measured on any op amp. I wasn't compensated by anybody in any way. It's best use as an alternative to opa1612 when noise is not a big concern. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. PRODUCTION DATA. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 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. I don't care about listening tests or something else, just want to use the technical better one in my amp. Jul 18, 2019 · Certainly this is consistent with my personal exposure to subjectivist audiophiles. Soundstage and placement felt more solid. Composite amplifier is one of the best application with opa1656. There are many reviews of audio hardware and expert members to help answer your questions. May 23, 2018 · The first and obvious conclusion: we must avoid the audiophile Burson Audio V5. 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. 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. the differences aren't huge, but big enough to make a change worthwhile. OPA627 is really bass forward but you lose details, clarity and energy. 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. 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. Dec 10, 2021 · This is my first time doing anything DIY with audio. Modi Multibit 2 is available now at schiit. Quite impressed with them. The output swing for Aol should be considered as it is different between the two devices. Mar 17, 2019 · The main reason for using metal cans was to get a hermetically sealed package & reduction of die surface stress. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. 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. This ready-to-use version is designed for audiophiles needing a foolproof amplification solution. The price? $299. Two identical gain 11 amplifiers were tested. 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. Aug 26, 2020 · I pasted below my review of the A07 from earlier this month. 2024 has been a strange year in the high-end audio category. Now take one of the oldest audiophile magazines in Japan. 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. 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. 1 is now ready with OPA1656 in DIP8 socket. Jan 2, 2020 · I only have a 2. At least -120db thd performance. But it's just a theory. 000035% (–129 dB) at 20 kHz If you love the OPA1612 you will love the OPA1656 too. Apr 8, 2021 · I tried OPA1622, OPA627 and OPA1612 at I/V stage and OPA1612 is clearly the best to my ears. Aug 21, 2024 · At only $279, the Schiit Saga 2 Preamplifier claims to be the best volume control in the world. Aug 20, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. 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. Mar 17, 2018 · Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. There are many dual opamps to choose from. 5Vrms signal, 80-kHz measurement bandwidth. Measured at non-inverting gain 40dB and 3. Desire to learn and share knowledge of science required. 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. V6 vivid measured superb tho. The folks are predominantly tube amplification enthusiasts, a fair portion of whom really like SET amps. Jan 17, 2022 · I posted it elsewhere as I did this experiment in May 2021 and want to share my experience. I had no oscillations or instability with the OPA1656. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. 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. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. 0006%, 20Hz-20KHz, at 2V RMS IMD: <0. 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. 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. 1F X7R on the backside with the shortest possible lead length. My OP1656 OpAmp Review. 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. Just getting a better (cheap) opamp worth it. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 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. Review. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. I felt a great improvement overall. Then, there remains the lack of sound library choices, a lot less than those recorded for windows. 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. 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. in order to resurrect those signals the preamp applies a maximum gain of 1000 b/c the basic mid-band gain must be ~ x100. 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. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. 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. 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. 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. 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. OPA1656 Talking about AIYIMA A07, it will end up in a dustbin soon. 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). It offers exceptional performance in almost any audio application. 6 fa/rtHz broadband current noise. Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. Since the 3rd and 4th stage noise is so insignificant, a low noise op amp such as the OPA1656 provides no benefit there. It has the most stable input capacitance vs. You retrieve so much details and trebble extension but could be a bit fatiguing. 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. 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 21, 2023 · One of our customers recently bought several OPA1656 directly from us. 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. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. Aug 25, 2023 · Noise above the audible range may affect downstream badly designed items. 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. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. 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. It is important to use the OPA1656 in both the first and second stages. (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. ockpis kjm hxao yngg vtsfr lvbn vxsc fer oklmj smi