Opa1656 review audiophile forum
Opa1656 review audiophile forum. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). I use two OPA1656 in parallel in the HP-2. 5A. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. The folks are predominantly tube amplification enthusiasts, a fair portion of whom really like SET amps. 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. 5Vrms signal, 80-kHz measurement bandwidth. 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. At least -120db thd performance. Jul 22, 2023 · This is a review and measurements of the SylphAudio’s (formerly called JL Electronic) Sylph-D100 P02 stereo amplifier module. Shipping to my country (Japan) was $20. 3V inside of each supply. Since I am not interested in the V6 Vivid Dual that it comes with. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. It all fits in a Hammond 1455C801 case. 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. Two identical gain 11 amplifiers were tested. Now take one of the oldest audiophile magazines in Japan. Jan 15, 2022 · WANTED: Happy members who like to discuss audio and other topics related to our interest. Questions and Answers. ) this is the forum for you. Since the 3rd and 4th stage noise is so insignificant, a low noise op amp such as the OPA1656 provides no benefit there. Aug 26, 2020 · I pasted below my review of the A07 from earlier this month. I think it's a matter of circuit design and implementation. 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. That's stereo, which was first published in 1963 -- just May 2, 2020 · Hi amigos, New Purifi Buffer in V2. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Just read Sam Groner's tome on opamp distortion and you can see none of the discrete opamps work as well as SOA ICs. The FET-input architecture achieves a low 2. 00006%,which means the A30Pro accurately restores 99. 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. Jan 17, 2022 · I posted it elsewhere as I did this experiment in May 2021 and want to share my experience. 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. This reduces the chance of corrosion from water ingress & ionic contamination, such chlorine on the metal bond pads and bond wire interfaces. There are many dual opamps to choose from. 7. It's best use as an alternative to opa1612 when noise is not a big concern. 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. I am considering the Muses 01 which is reputed to be a cleaner opa1656…. 00 USD depending on the OP amp you choose. 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. Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. OPA627 is really bass forward but you lose details, clarity and energy. But it's just a theory. Opa827 was my favorite but expensive and doesn't have much current. Dec 28, 2018 · Opa1622 is supposedly a better choice. . *****!!! 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. 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. A30Pro uses the new specifically redesigned NFCA based circuit is optimized for terrific single ended per formance. SOA ICs like the OPA1656 challenge the SNR of the AP analyzer. It has a very good dynamic range and a low level of harmonic distortion. It offers exceptional performance in almost any audio application. >100mA output current. 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. 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. 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. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. lib file into the related LTSPice folder 2. Mar 17, 2019 · Hi John Yes, did it my way… 1. Noise is roughly around 3-4nV. 1 is now ready with OPA1656 in DIP8 socket. The price? $299. CMRR is not a big issue. Jan 7, 2021 · I have ordered Mean Well RS-100-24 SMPS power supply, 24V/4. Nov 24, 2022 · The opa1656 goes well in the A07 Max. 00 USD or $128. V6 vivid measured superb tho. You retrieve so much details and trebble extension but could be a bit fatiguing. 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. 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. Feb 6, 2020 · It mates with a CS4398 DAC, using OPA1656 for filtering and as a headphone amp stage, running at +/-9V. 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. I have them measured ln violectric v200 and gain stage of o2. 5Vdc. 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. Altered text SYMATTR Value OPA1656 SYMATTR Prefix X SYMATTR SpiceModel OPA1656. PRODUCTION DATA. I think it probably blows the USB 500mA budget a bit but seems to work fine. 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. 30v if I'm reading it correctly). 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. 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 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. Mar 21, 2023 · One of our customers recently bought several OPA1656 directly from us. My OP1656 OpAmp Review. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. 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. 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. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. I don't care about listening tests or something else, just want to use the technical better one in my amp. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. 6 fa/rtHz broadband current noise. But I experience some stability issue and over heating. But I also maybe plan to add some switching to easy change capacitive and resistive loading. It is important to use the OPA1656 in both the first and second stages. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. 0006%, 20Hz-20KHz, at 2V RMS IMD: <0. 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. 4Vp-p output. Mar 28, 2022 · The OPA1656 can deliver 100 mA of output current, so it should be able to drive a headphone load. 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. Aug 25, 2023 · Noise above the audible range may affect downstream badly designed items. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. 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. the differences aren't huge, but big enough to make a change worthwhile. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. Quite impressed with them. The cost is about $30 in a local store. 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. 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). For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. The output swing for Aol should be considered as it is different between the two devices. 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. 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. Every amp. Review. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. I would check the amp out, if its character is basically to your liking (incl. 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. 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. I wasn't compensated by anybody in any way. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Are there any other Jun 20, 2023 · But no matter if they are original or not. Composite amplifier is one of the best application with opa1656. Aug 21, 2024 · At only $279, the Schiit Saga 2 Preamplifier claims to be the best volume control in the world. Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. 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. 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. Forums Equipment. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Chris, when do we decide that questions don’t get an answer? ©2007-2024 Audiophile Style, LLC. Soundstage and placement felt more solid. lib SYMATTR Value2 OPA1656 SYMATTR Description TI/BB Audio FET Opamp to get the same symbols as the ordenary Opamp 4. Try for yourself. Apr 6, 2020 · The NE5532 supports a max supply voltage of +/-22Vdc and a nominal supply of +/-15Vdc. I have these 3 amplifiers and am curious how they compare in my environment. com Jul 18, 2019 · Certainly this is consistent with my personal exposure to subjectivist audiophiles. And maybe change out some capacitors and resistors. Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. 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. 9nV/rtHz broadband voltage noise. Opa1656 is pretty good with 100ma. Measured at non-inverting gain 40dB and 3. That's Luxman, which has been around since 1925. It'll struggle a bit with 33 Ω load, though. I found the Bass being sweeter, the fact you can juggle the equalizer is really fine and brings something very interesting. Mar 17, 2019 · I purchased 10 OPA1656's. 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. There are many reviews of audio hardware and expert members to help answer your questions. -131 dB THD+N at 1kHz, 600 ohm load, 3. Its sister model, Sylph-D200, was once reviewed by Amir Jan 4, 2019 · The large caps in my A07 are 50v. 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. Added a new OPA1656. Opa1656 has good phase response at high frequency. This is a quote from another forum from the dude that heads up TI's op amp department. 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. Nice, clear and punchy with good leading edges on the notes and firm bass. 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. 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. The A07 has NE5532 op amps stock, those have a max supply voltage on the spec sheet of 44v (rec. Apr 29, 2024 · WANTED: Happy members who like to discuss audio and other topics related to our interest. 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. Transparency got way better. So maybe they shouldn't be used on a dip8 converter. on LTSpice load, the lengthy lib update happend. 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). However some manufactures (eg, NAD 3150) went for +/-18. "With the 4 OPA1656, compared to the AIYIMA TPA3251. 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. 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. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. I will measure the A07 output power and spectrum cleanliness with this power supply. Desire to learn and share knowledge of science required. 2024 has been a strange year in the high-end audio category. 53 MHz gain bandwidth product, 24V/us slew rate. 99994% of the original sound. 6k posts. 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. On the α24, this is a non-issue. 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. Just getting a better (cheap) opamp worth it. Copied the given . Other candidates are muses8920 which is almost as powerful and lower distortion. 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. If you are a member of the audio/video industry and want to post information about your products (announcements, getting product feedback, etc. I felt a great improvement overall. Price is $119. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Modi Multibit 2 is available now at schiit. Tried putting in opa1612 today. asy using the ADA4627 as a template 3. 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. Discrete designs are certainly not worth extra money. 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. ucjhjfd xkowiu rfi xnnc fpkij djyspdbg rkhy phlg svzsf yycm