Opa1656 vs opa627 sound quality reddit. Mar 17, 2019 · No brainer there, JFET and CMOS types.

Opa1656 vs opa627 sound quality reddit. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. I decided to make some prototype boards. 3 MHz. Jun 8, 2023 · When the datasheet was revised due to the addition of OPA2828, the notation "RRO" was removed. The OPA1642, however, is also LESS expensive ($2. So put 10 x OPA1656 in a bag to send costs 16,76 $ , to put 10 x OPA627 in a bag to send costs 130 $ . If your phone, MP3 player, computer, etc (whatever your audio source is) has a good DAC then it might be good to May 19, 2004 · Joseph K. Overall a very pleasing combination all round and a great sound for little money comparatively. I agree as well. #1. lib SYMATTR Value2 OPA1656 SYMATTR Description TI/BB Audio FET Opamp to get the same symbols as the ordenary Opamp 4. From my understanding 3,5mm mic depends mainly on the sound card that mobo has built in. 000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. 2013-06-30 1:38 pm. May 20, 2023 · The OP1656 is the exact opposite, while still being detailed. Only very very well designed discrete circuit is capable to give same sound quality as OPA627 with increased Iq. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. #47. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. • Professional audio mixer/control surface • Guitar amplifier and other music instrument amplifier • A/V receiver • Bookshelf stereo system • Professional audio amplifier • DJ equipment • Turntable • Special function module 3 Description The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 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. This device also features excellent output current drive capability, offering rail-to-rail output swing to within 250 mV of the power supplies with a 2-kΩload, and can deliver 100 mA of output current. Mar 17, 2019 · OPA1656 also has a pole-zero pair in the open loop gain curve to boost the open loop gain at audio frequencies (hence the 53 MHz gain bandwidth product). Thanks for that recommendation. Jul 4, 2009 · The two others are opa2107 and opa627. 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. If you're into DIY there are multiple threads here about upgrading caps, op-amps, inductors and even power supplies for better sound. Mids: Not as forward as 5532. It can be replaced but you'll get diferent sound character. The BA is only an indication of "grade" for certain tolerances for optimal conditions for use. The AD8620BR, is a very nice opamp and you should be very pleased with it. Altered text SYMATTR Value OPA1656 SYMATTR Prefix X SYMATTR SpiceModel OPA1656. Aug 5, 2004 · For OPA627, the improvement is substantial. TI has characterized the THD vs Rs for a lot of its recent devices, but alas not the OPA1656 (at least that I could find). The music is more liquid. My Pimeta with 8610's sounds great with the Senns but just about fries my head with the Grados. Setup calibrated in dbV. strangely its probably the most boring sounding one when paired with 400i but the best sounding with hd600. I can’t really decide because I’m not 100% sure what would deliver better sound quality. I would not classify the OPA1656 as a high speed amp in this context. I like the 627s but prefer the OPA637 for my own system. Same opamp could sound more open and with a darker background when tested in equipment #1, but may sound with a much closer scene and with a bit of hiss-noise when installed in equipment #2. Absolutely positive, nothing to complain. Definitely an improvement. In addition to the lower voltage supply, I will be drilling some ventilation holes in the bottom and top of the case for better cooling. Feb 25, 2005 · From all of those and the ones I have tried in my PPA I would only choose the OPA627 for the ground channel, (not for the L and R) and the OPA637 for the L and R, the rest will sound inferior IMHO, of course I'm talking in my PPA, in any other application probably they will sound different, some of them better, some others more warm or bright For the usb I would probably choose Fifine K669B with a boom arm. #12. Mar 17, 2019 · 2022-10-15 8:53 pm. 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 12, 2004 · 2004-07-14 8:13 am. Mar 17, 2019 · Hi John Yes, did it my way 1. From the data sheet, in comparison to the OPA1642, I see that the OPA1656 has slightly less voltage noise but also slightly more current noise; slightly faster and less THD, but worse CMRR. Which one has better electrical characteristics? will replacement of the chip affect the sound?Any things should take into consideration? OPA627 is a single channel op amp. Joined 2009. ••• OPA1656 delivers a low distortion of 0. The AD8620,627,637 are in a different league then the 4562. T9 pro is a good unit but has (in my opinion, way) less control over the bass and a slimmer soundstage. While emailing with a great Tech Support guy at Rotel, he suggested only one Rotel approved Mod. Jan 6, 2020 · Power, 32Ω: 3W per channel. http May 4, 2004 · Basically, my recollection is that the 2604 kept the characteristic Burr Brown sound, but the soundstage seemed wider and the clarity was higher than the 2132. I used though the better TIs in output stages of middle class DACs as these benefitted from a more round /warm presentation with less details, as that masked their weaknesses and in fact Jul 18, 2004 · The two are synergistic. As you can see I'm limited by performance of Audio Precision APx525. However, the web page is still marked as "RRO". I look forward to it sounding even better. solderdude said: Actually the SIL opamps are pretty good. I like the low noise aspect of it, though it's pretty expensive. May 26, 2016 · Q: (better) alternative for OPA627 ? Hi since end of the 90's the OPA627 has been a very good audio grade operational amplifier. Another surprize , you'd think considering the price and age , next gen OPA827-828 would have replaced the 627. (RL is the original 2kΩ. Log in to respond. ••• Dec 27, 2019 · Dec 27, 2019. Generally a FET input has a higher 1/f noise corner than a BJT input. 9 $ , they have a decent margin ? Mar 25, 2023 · Performance. The effect is in clearer mids and highs and the overall resolution for the complex music. Both methods generally increase open loop gain up to around 65 - 100 kHz then it will taper off more quickly than a traditional single order compensated opamp. For comparison reference, the waveforms of RRO type OPA1611, 1641, 1655, ADA4625-1, and non-RRO type OPA627, 827, LME49710, ADA4627-1 are attached. 08 @ Mouser). Description for the OPA1656. I want to use it as a pre-amp to power speakers, so voltage of XLR at only 2V RMS on the Leaf is disappointing: Leaf DAC Dual 9038Q2M SPEC : 2x 9038Q2M. In fact, I had put in Yanasan's dual 4499 dac the OPA1656 as I/V converter and the OPA828 as diff/ SE summing. Furthermore, the noise performance of the 627 is about 50% better than the 2134. Haven't tried op amp rolling, just commenting to say that I think you'll find the V3 with the 48v psu much better than the T9 pro. You are not “wrong“ in describing the Opa1656, it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. 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. Mar 17, 2019 · The schematic, spectrum and results are given below. And ADA4627, which appears intended as a direct Jul 4, 2009 · i just compared my current favourite opamp opa1656 vs the much older opa627 (its a dual module from audiophonics, the IC`s are "used" if this matter but as long they function correctly i only see the benefit of them being already burned in ) i tested these with the Aune X8 XVIII. Take a look at this figure from its datasheet. Previously they were JRC5534 then OPA134 and I was looking for something like the OPA1656 but single. #2. At the end of last year I was talking to Jim @6L6 about some project ideas, and the OPA1656 / BUF634A Headphone amp came up. Unfortunately I don't have analog oscillator option installed in my AP so SINAD measurements are limited to about 105-110dB. LM is the best overall, it sounds the most balanced, very natural/smooth/clean, doesnt exaggerate anything but can sound lacking in impact. But I think careful gentle bending and soldering will make it fit. Finally, 3e Audio has instructions (attached) how to add a post feedback filter Mar 17, 2019 · The OPA627 was released in the 90s and we're still selling them in high volume. the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption. 9 MB · Views: 450. You’re going to love the Gen 2 USB C! My Atmos is off, and my Lossless is on. Hi Team, My customer wants to replace OPA1656 with OPA2134. OPA2156 does not, it is closer to a single pole response. #10. Feb 11, 2021 · Used OPA1656 in I/V of PCM1792 in dual mono configuration. 000. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise OPA627 has always had an excellent reputation for sound quality, but how much of that is quantifiable into specs or simply subjective is tough to determine. I only have free accounts on both of them which means 128 kbps MP3 on Deezer and 160 kbps Ogg Vorbis on Spotify. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Mar 19, 2005 · The GBW and Slew Rate of the 627 is higher than that of the 2134 (GBW of 16mhz versus 8, and a Slew Rate of 55 V/us versus 10). This is one reason why Wayne Colburn's WHAMMY composite amplifier makes a lot of sense. However, it doesn’t sound like those two chips at all! It’s very musical imo. Another listen. The performance of the CMOS audio op amps is actually fairly close and maybe slightly better than the OPA627, which was somewhat famous for its performance in this use case. #3. Except opa1656 rest of opamps are available on rsdelivers. Sep 14, 2021 · The LM4562 is an exception, but otherwise it are the fast op-amps that JRA has trouble with: Misbehaving: OPA1656, gain-bandwidth product 53 MHz LME49990, 110 MHz OPA1612, 40 MHz Behaving well: OPA2604, 20 MHz OPA627, 16 MHz OPA2107, 4. 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. OPA2604 is FET input opamp. May 22, 2023 · Yes, OPA2828 (dual version of 828) should definitely work well in this preamp, with a socket adapter It has low noise, high GBW, high slew rate and is unity gain stable. Sep 14, 2021 · This leads me to believe there could be an issue caused by the back-to-back diodes across the inputs of bipolar (LME49990, OPA1612) and CMOS op amps (OPA1656). If a transient causes the op amp inputs to be pulled apart, the differential input voltage forward-biases those diodes causing a large input bias current. I'm also ordering OPA2134 opamps to replace the NE5532's that are stock. 2017-06-04 7:42 pm. I would say that if you want a quick drop in replacement to try out the Burr Brown/TI sound, pop in the 2134. 5 nV/vHz at 10 kHz but they are pricy (€40/pc) ! They are still manufactured and available. OPA2156 is also laser trimmed for lower input offset voltage. Part Number: OPA2134. In final have to say, that OPA1656 is best of the best in I/V for me to now. The output transistors are power devices mounted on hefty heatsinks. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. For audio use, I see no reason to buy OPA627 when you have OPA827, OPA828, OPA164x, and OPA1656. Tried in this place OP275, OPA1612, OPA1642, OPA1656 and OPA828. Aug 9, 2021 · 1. He said to replace the two XR5534A op amps with two AD847 op amps and to replace four 18 ohm resistors R219, R220, R225 and R226 with Jan 6, 2010 · apolo. A good candidate for those who want to play, definitely. May 23, 2018 · However, swapping opamps seems to be more dependent on the surrounding circuitry, their quality and PCB layout, than the opamp itself. Intentions are in a few days to roll the 2134 in the A07 to see if they outperform the LM4562 but in all honesty the 2604/4562 combo Mar 17, 2019 · The obvious reason why someone would buy OPA627 is: because they tried it in their equipment and perceived that the sound was best, in their opinion, compared to all other opamps they tried. #764. The newer "B" version of the 3e Audio 2 channel 3255 amp has the op-amps on DIP sockets for easy upgrades. Output signal is amplified 90db. asy using the ADA4627 as a template 3. The only thing I could find was OPA1641 and not even the right package. . Feb 11, 2021 · Even AD797 or OP627 cant hold a candle vs OPA1612 in terms of SQ - the difference is HUGE! My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. Power, 150Ω: 700mW per channel. However I like the slew rate of OPA2156 , any pointers on what to improve THD+N ? Mar 17, 2019 · Here is a copy paste of the result for OPA1656 OPA1656 In the past I have to say I prefered widely the AD precise sound vs the softer traditional TI sound. It's pretty impressive how some opa amps and other chips are made to ”make up” for poorly designed or ”shortcuts” by engineer to save space. Using AUX in, the audio quality is based on the source device's digital to analog converter (DAC). I routinely use OPA1656 and related on adapters without any issues. The Aiyima a07 runs very cool normally but was getting pretty hot to the touch when the ambient temp was 38c. Depends on the source and the receiver you will be using. Mar 17, 2019 · 2019-07-04 11:22 pm. The result is quite spectacular. Mar 17, 2019 · I am using OPA1656 for duals. May 19, 2017 · Joined 2006. Mar 17, 2019 · When we developed the OPA1656, this was also a major design target [] This article shows the measurements I took on the OPA164x family. ) Nov 30, 2021 · OPA2134: OPA2134 VS OPA1656. Even at prices you may think are low, they have decent margins. ---then opa2134 the best all around as preamplifier it can be used at high gain 6-10 times,very good sounding and Musical,good for biassing in class A. try modding with better FET input opamp, like OPA2107 or OPA2111. 2010-06-10 8:32 am. OPA1612 is bipolar input opamp. Dec 11, 2019 · The SIL uses small inductors on IP transistors. on LTSpice load, the lengthy lib update happend. The FET-input architecture achieves a low 2. This means that the 827 will be able to handle larger signal voltages and currents than the 627 can. Mar 17, 2019 · No brainer there, JFET and CMOS types. Also, since it has a much higher maximum operating frequency (100 MHz), it can be Mar 17, 2019 · So to put 1 in a baggie exactly like the OPA1656 , they charge 15,69 $ !! , to put 10 in a baggie : 130 $ !!! TI does all the work and Mouser leaches more profit off from it. Much more refined, even a little sibilant. 5 metre cable at 33. Like many opamps, the OPA1656 does NOT have constant gain-bandwidth product. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. If 3,5mm then probably Tracer studio Pro with boom arm. Ordered the opa1656 and the new BUF634A. T9 pro to my ears was a bit muddier in the low end than my Aiyima a07 and even more so the V3. Mar 3, 2023 · 2023-03-03 4:27 pm. Joined 2011. Recently I also uploaded 320 kbps MP3 files to my Deezer account of the Love Symbol album by Prince and compared all three versions on my HiFi gear. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. Member. However I have a couple PCB that use singles. . The AD8610 seems to present a more open window, especially in the highs, on music, transients and realism of highs being enhanced. According to the datasheet, TI lists: BM, BP, SM, AM, AP, and AU grades. In terms of performance, the OPA827 is a higher-quality amplifier than the OPA627. Weight 750 grams. lib file into the related LTSPice folder 2. com and all are unity gain stable. Both are the same price. OPA627/37 I tried both OPA627 and OPA637 in this circuit, and both were pretty much the same because of the low gain setting of the feedback resistor. Less conversion and no signal drop. Best SQ have with 1656. 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. The old process technology for OPA627 used dielectric isolation, whereas the OPA828 has the same JFET technology as OPA1644, yielding very low voltage coefficient on the input capacitance USB is beter than both by a long shot. Jan 28, 2018 · The overall sound balance is quite neutral, and detail is very good but not extreme. r/audiophile. Power, 600Ω: 185mW per channel. Eric Mo. It's a relatively harmless pursuit and the price is similar to the price of a vacuum tube -- which audiophiles happily pay, and then furiously swap among Jul 4, 2009 · New BUF634A has higher slew rate, wider BW and decreased quiescent current in wide-BW mode, and is cheaper than original 634. It’s a full rich sound with great vocals, detailed highs, and beefy low end thanks to the opa2604 and the Mullards. Jun 18, 2019 · Hello everyone, I have the DAC Emotiva XDA-1 preamp with the DAC Analog Devices AD1955 and Burr Brown OPA-2134 op-amps, I want to update to the Burson Audio Play with the DAC: ESS Technology SABRE32 / ESS9018 and NE5532 X 3, NE554 X 2 op-amps, would it be a good update to the Burson Audio? thank you very much to all. Audio input: Bluetooth / USB / LVDS / Optical / Coaxial. Your best bet is 8610/20. Specs: Very Low Noise: 4. Aug 28, 2008 · The LM4562 is a nice opamp and won alot of awards when it was released for the performance to price it is good. It offers exceptional performance in almost any audio application. I have a pair of SR-325's and a pair of HD-580's. I bought APP2 shortly after their release, and they’ve become my EVERYWHERE buds (I have a couple pairs of good quality headphones, a couple of Amp/Dacs, and a couple sets of mid-range Bluetooth earbuds). The latter method used in SIL was first used in the famous (Deane) Jensen 990 discrete opamp many years ago. Intellectual 735 points. Compare them on paper for yourself as to what features or parameters are most important to your design. Not targeting Mouser here , most of the others are worse. Other Parts Discussed in Thread: OPA1656, OPA134. Copied the given . My PPA with 637/627's sounds great with the Grados, but kind of muffled with the Senns. And the "tail" dissappears. dotneck335 said: An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. What about the murky world of source impedances between 1-10kOhm where it seems like every audio circuit ends up?! 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). Mar 17, 2019 · Hi John I am also looking at IV conversion with output at 1Vrms From the datasheet of OPA1656 or OPA2156, it seems that at 1Vrms THD+N , OPA1656 performs better . The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. These combinations should be equal to a single op-amp noise and 4 paralleled op-amps noise. Think of it as the 2nd child that's not trying to seek attention, hard-working/dependable and happy in the background. Bass: Lesser & not as bloated as 5532. R. Added a new OPA1656. Well, listened again last night to AD8610 (unbiased) vs OPA627 (biased into Class A, 2mA, with a JFET) and there is a difference. Dec 15, 2017 · Ive compared the NE5532, NJM4556 and LM4562 so far. Apr 8, 2021 · Note, I think weight is important to show quality, here you have 750g vs 2kg. Really ? On a new OPA1656 that cost around 0. Mar 17, 2019 · proid. (But I always thought the 2132 sounded muddy. Jul 4, 2009 · I've been told that switches aren't good for audio so the Opa1652 really makes up with voltage gain if there are flaws in the DAC. Mar 17, 2019 · But MHO is that if you want a 1656 single, spec-wise the OPA627 single (unity gain stable) and its faster sibling the OPA637 (gains ≥ 5) come real close to or better the much newer OPA1656 dual. With a FET input op amp input current noise is lower, but the input voltage noise is higher. Heard it all here with different LS and poweramps. Bit of a pricey sucker though (which, mind you, is not unexpected Aug 24, 2012 · Member. The sound quality with Apple Music is sublime. It is more of a subtle detail that is not in your face, but there when you are paying attention. Mar 17, 2019 · If the impedance is high (10k ohm or higher), then a FET input op amp may be better. i tryed lme49722 opa2134 and opa1612 , --. Mar 17, 2019 · OPA1656: High-Performance CMOS Audio Op Amp. Not sonically different of course but good performers and can actually run on +/-24V (in case one needs opamps to go slightly above the usual +/- 18V rails) When rolling opamps having a 1GHz scope could come in handy. OPA1656 is positioned for audio applications: low noise and really good THD (-131dB) and high output current (100mA), but still needs a series resistor to drive capacitive loads unfortunately. May be 828 will be better, but i have to do some thing in the board to extract best of it. The 827 has a gain of 22 MHz while the 627 has a gain of 16MHz. ) Behind the 2228, the 2604 is my favorite BB opamp that I have heard (I have yet to hear the 627). Apr 11, 2007 · The 865 already sounds pretty sweet for an older, not too expensive CDP. Its second stage (output) amplifier runs pure class-A at 67mA / 100mA (builder's choice) bias, controlled by an optoisolator bias servo. The effective input noise depends on both the input current noise & input voltage noise. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. There are additional poles and zeroes in its frequency response, which introduce additional lumpity bumpity behaviors in the gain-vs-frequency and phase-vs-frequency plots. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Oct 2, 2020 · I want to drive a non-inverting OPA1656 from the wiper of a volume pot -- which means a range of source resistance for the OPA1656 from 0 to <del>Rpot/2<del> Rpot/4. ed nz jd fl jz fl zk qj ji mu