Opa1656 review audiophile forum

Opa1656 review audiophile forum. 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 Sep 17, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. 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. Its sister model, Sylph-D200, was once reviewed by Amir Jan 4, 2019 · The large caps in my A07 are 50v. I don't care about listening tests or something else, just want to use the technical better one in my amp. Dec 28, 2018 · Opa1622 is supposedly a better choice. 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 Feb 17, 2020 · In principle all variants should sound transparent, but you have the option to change the Audiophonics OP amp if you want. Opa1656 has good phase response at high frequency. That's Luxman, which has been around since 1925. 00 USD depending on the OP amp you choose. 7. This gave me a chance to Mar 17, 2019 · The main reason for using metal cans was to get a hermetically sealed package & reduction of die surface stress. 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. >100mA output current. This is a quote from another forum from the dude that heads up TI's op amp department. OPA1656 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. I think it probably blows the USB 500mA budget a bit but seems to work fine. Try for yourself. com Jul 18, 2019 · Certainly this is consistent with my personal exposure to subjectivist audiophiles. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Mar 28, 2022 · The OPA1656 can deliver 100 mA of output current, so it should be able to drive a headphone load. It offers exceptional performance in almost any audio application. . 30v if I'm reading it correctly). He did measurements to verify that it was stable Apr 8, 2021 · I tried OPA1622, OPA627 and OPA1612 at I/V stage and OPA1612 is clearly the best to my ears. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. If you are a member of the audio/video industry and want to post information about your products (announcements, getting product feedback, etc. 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. Jul 4, 2009 · It’s still early but I can safely say the opa1656 is a special one as far as THE ultimate utility “operational” amp that makes ANY great sounding op amp sound nearly blissfully perfect! It’s a bit trembly but not annoying just not as bassy sounding (which most of my music pallet favors). Other candidates are muses8920 which is almost as powerful and lower distortion. I found the Bass being sweeter, the fact you can juggle the equalizer is really fine and brings something very interesting. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. 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. 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. On the α24, this is a non-issue. Mar 17, 2019 · I purchased 10 OPA1656's. Just getting a better (cheap) opamp worth it. Opa1656 is pretty good with 100ma. 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. But I also maybe plan to add some switching to easy change capacitive and resistive loading. 0006%, 20Hz-20KHz, at 2V RMS IMD: <0. Forums Equipment. Aug 26, 2020 · I pasted below my review of the A07 from earlier this month. Two identical gain 11 amplifiers were tested. Audiophonics uses TI-LM4562 by default, which on paper has slightly lesser specs than the OPA1612 and OPA1656 which are used in the other custom implementations (EVAL, VTV, Neurochrome, BoXem etc). Quite impressed with them. Review. 6 fa/rtHz broadband current noise. Apr 6, 2020 · The NE5532 supports a max supply voltage of +/-22Vdc and a nominal supply of +/-15Vdc. 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 Talking about AIYIMA A07, it will end up in a dustbin soon. The price? $299. on LTSpice load, the lengthy lib update happend. lib file into the related LTSPice folder 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. 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 looked at the Slew Rate as my main 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. He's speaking about the OPA1656 but I think the gist is relevant: View attachment 224602 Jul 19, 2020 · To me, the belief that discrete transistor designs are superior to IC designs is just ignorant, dogmatic, and wrong. V6 vivid measured superb tho. Apr 29, 2024 · WANTED: Happy members who like to discuss audio and other topics related to our interest. It all fits in a Hammond 1455C801 case. Nice, clear and punchy with good leading edges on the notes and firm bass. 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, 2018 · Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. I would check the amp out, if its character is basically to your liking (incl. Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. You retrieve so much details and trebble extension but could be a bit fatiguing. I have them measured ln violectric v200 and gain stage of o2. 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. 5A. Jan 17, 2022 · I posted it elsewhere as I did this experiment in May 2021 and want to share my experience. 9nV/rtHz broadband voltage noise. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). The output swing for Aol should be considered as it is different between the two devices. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. Amplifier: Bamboo V2 3E Audio 260-2-29A Stéréo REB B (OPA1656) 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 Aug 20, 2023 · My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. I am considering the Muses 01 which is reputed to be a cleaner opa1656…. At least -120db thd performance. 53 MHz gain bandwidth product, 24V/us slew rate. There are many reviews of audio hardware and expert members to help answer your questions. SOA ICs like the OPA1656 challenge the SNR of the AP analyzer. I think it's a matter of circuit design and implementation. Mar 21, 2023 · One of our customers recently bought several OPA1656 directly from us. Jan 15, 2022 · WANTED: Happy members who like to discuss audio and other topics related to our interest. 5Vrms signal, 80-kHz measurement bandwidth. 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. 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. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. There are many dual opamps to choose from. It is important to use the OPA1656 in both the first and second stages. Hi Ervin, Yes those devices are very popular, unfortunately I don't have any way to know for sure when they are back in stock. Altered text SYMATTR Value OPA1656 SYMATTR Prefix X SYMATTR SpiceModel OPA1656. Measured at non-inverting gain 40dB and 3. 4Vp-p output. I have these 3 amplifiers and am curious how they compare in my environment. 00006%，which means the A30Pro accurately restores 99. Chris, when do we decide that questions don’t get an answer? ©2007-2024 Audiophile Style, LLC. 2024 has been a strange year in the high-end audio category. Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. It'll struggle a bit with 33 Ω load, though. Tried putting in opa1612 today. 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 Audio reviews, science and engineering discussions. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Feb 24, 2019 · WANTED: Happy members who like to discuss audio and other topics related to our interest. Desktop: Puritan PSM156 Antipodes K50 G4 (Squeeze) Bricasti M21 Feliks Audio Envy Performance (Elrog TM300B & Valvo / RT 12AU7) Subtonic Storm + Nightjar Sovereign Symphony / RAAL 1995 Imannis (Inbound) Feb 7, 2021 · The THD+N of A30Pro is no higher than 0. Mar 17, 2019 · Hi John Yes, did it my way… 1. Desire to learn and share knowledge of science required. Though I use it only occasionally mostly for tests, and it has not operated more than a couple of hours summed, the right channel started to emit high frequency hiss noise time after time, without any special reason, even if nothing is connected to the input. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Again, from known dealers or vendor like Digikey or Mouser, not Ebay or Aliexpress Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. But I experience some stability issue and over heating. Feb 6, 2020 · It mates with a CS4398 DAC, using OPA1656 for filtering and as a headphone amp stage, running at +/-9V. 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, Dec 8, 2018 · Portable: iBasso DX320MAX-EXN (OPA1656) Subtonic Storm + Nightjar Sovereign Symphony ~|~ Quloos MUB1 Sony IER-Z1R + BSEP. 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, Jan 15, 2020 · Luxman LXV-OT10 Phono Equalizer Amplifier Review/Measurements Let's take an audio company with nearly 100 years of history. Are there any other Jun 20, 2023 · But no matter if they are original or not. Mar 17, 2019 · OPA1656, and most modern CMOS op amps with rail-to-rail output stages, use a biasing scheme often referred as a Monticelli bias, named after Dennis Monticelli who published the topology while at National Semiconductor. Equipment setup: CD/SACD player: Oppo BD105 Stereophile’s Test CD2 , Track 15 pink noise, , for sound pressure level matching th Dec 10, 2021 · This is my first time doing anything DIY with audio. Just read Sam Groner's tome on opamp distortion and you can see none of the discrete opamps work as well as SOA ICs. Transparency got way better. the differences aren't huge, but big enough to make a change worthwhile. I use two OPA1656 in parallel in the HP-2. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Composite amplifier is one of the best application with opa1656. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. ) this is the forum for you. 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. "With the 4 OPA1656, compared to the AIYIMA TPA3251. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. Price is $119. lib SYMATTR Value2 OPA1656 SYMATTR Description TI/BB Audio FET Opamp to get the same symbols as the ordenary Opamp 4. 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. 6k posts. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. Soundstage and placement felt more solid. 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. 3V inside of each supply. asy using the ADA4627 as a template 3. 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. 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. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I will measure the A07 output power and spectrum cleanliness with this power supply. 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 May 23, 2018 · The first and obvious conclusion: we must avoid the audiophile Burson Audio V5. 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. 00 USD or $128. Aug 25, 2023 · Noise above the audible range may affect downstream badly designed items. This reduces the chance of corrosion from water ingress & ionic contamination, such chlorine on the metal bond pads and bond wire interfaces. Noise is roughly around 3-4nV. The cost is about $30 in a local store. 0006%, CCIR SNR: >114dB, A-weighted, referenced to 2V RMS Topology: based on OPA1656/OPA1678 Feb 13, 2016 · Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. I felt a great improvement overall. OPA1612 is a great amplifier, however, it is bipolar (input type) and when used immediately at the front-end of a guitar input, the input current noise (1. Added a new OPA1656. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 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. Shipping to my country (Japan) was $20. 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. Questions and Answers. PRODUCTION DATA. Every amp. Opa827 was my favorite but expensive and doesn't have much current. CMRR is not a big issue. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the This OPA1656 OPA from Texas Instrument offers very good performances for audio use. Copied the given . Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. The A07 has NE5532 op amps stock, those have a max supply voltage on the spec sheet of 44v (rec. My OP1656 OpAmp Review. 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. 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. 1 is now ready with OPA1656 in DIP8 socket. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. The folks are predominantly tube amplification enthusiasts, a fair portion of whom really like SET amps. Aug 21, 2024 · At only $279, the Schiit Saga 2 Preamplifier claims to be the best volume control in the world. Nov 24, 2022 · The opa1656 goes well in the A07 Max. And maybe change out some capacitors and resistors. Jan 7, 2021 · I have ordered Mean Well RS-100-24 SMPS power supply, 24V/4. It has a very good dynamic range and a low level of harmonic distortion. It's best use as an alternative to opa1612 when noise is not a big concern. Since the 3rd and 4th stage noise is so insignificant, a low noise op amp such as the OPA1656 provides no benefit there. Discrete designs are certainly not worth extra money. A30Pro uses the new specifically redesigned NFCA based circuit is optimized for terrific single ended per formance. *****!!! 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. But it's just a theory. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. OPA627 is really bass forward but you lose details, clarity and energy. I cannot recommend a 48V power supply because of the A07 internal temperature with the 48V PSU, in case I 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. 5Vdc. The FET-input architecture achieves a low 2. Modi Multibit 2 is available now at schiit. Jul 22, 2023 · This is a review and measurements of the SylphAudio’s (formerly called JL Electronic) Sylph-D100 P02 stereo amplifier module. 99994% of the original sound. That's stereo, which was first published in 1963 -- just May 2, 2020 · Hi amigos, New Purifi Buffer in V2. However some manufactures (eg, NAD 3150) went for +/-18. So maybe they shouldn't be used on a dip8 converter. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Now take one of the oldest audiophile magazines in Japan. Since I am not interested in the V6 Vivid Dual that it comes with. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. vwdgpn fpbs ocbpm stu wgdlyor ejxi fkhw kuennty oefcdl ajf