Opa1656 vs opa627 sound quality reddit

Opa1656 vs opa627 sound quality reddit. But I think careful gentle bending and soldering will make it fit. For most speakers, this means that the midway point between the tweeter and woofer should be at ear height. #829. New BUF634A has higher slew rate, wider BW and decreased quiescent current in wide-BW mode, and is cheaper than original 634. abraxalito said: Actually MOS, not junction FETs. 000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. The latter method used in SIL was first used in the famous (Deane) Jensen 990 discrete opamp many years ago. 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. Also, since it has a much higher maximum operating frequency (100 MHz), it can be Jul 4, 2009 · The two others are opa2107 and opa627. Most audio analyzers like AP have bandwidth limiting filters at 80kHz, with 500kHz being the unfiltered bandwidth. Half of measured distortion is DAC contribution. 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. 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. According to the datasheet, TI lists: BM, BP, SM, AM, AP, and AU grades. Mar 17, 2019 · Not sure if we have the same understanding of "noise figure" but nevertheless, OPA1656 is less noisy than the OPA827, 2. The newer "B" version of the 3e Audio 2 channel 3255 amp has the op-amps on DIP sockets for easy upgrades. 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. 1641 is one of their many options. Final measurement is 31 tone signal which produces 16 Vpp at amplifier output. Of course, these companies sell lower priced sets that will still sound really good. Depends on the source and the receiver you will be using. 2013-06-30 1:38 pm. Tidal is better due to lossless sound quality I did that flac vs 320 vs 128 test and scored 5/6 for flac. 5 V to 36 V) on 3. Dec 31, 2021 · It is correct that with A-weighting the OPA1656 has a slight advantage. Mar 17, 2019 · The schematic, spectrum and results are given below. 5-nV/√Hz noise density with an ultra-low distortion of 0. The 4627 is faster the the 627 (82v/uSec vs. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. but perhaps the mixer will sound fantastic without any mods. Sep 14, 2021 · Therefore the new bottom line is, if they called a halt to these festivities and I had just these choices I'd go with the "Good enough" 220R/15pF combo; use the 1612A or 1656 if they sounded better than the current favorite and well-behaved OPA627. 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. Cimarron has the 1641 in SOIC-8 OPA1641AIDR Texas Instruments - Cimarron Technology They can also mount SOIC-8 on a DIP-8 adapter. common mode voltage that I've measured on any op amp. $15 for the 'A' and $23 for the 'B'I don't think so. #4. The limitation is thermal not electrical. . Mar 17, 2019 · No brainer there, JFET and CMOS types. Setup calibrated in dbV. In my case the OPA828 has been a clear upgrade to the OPA627 but the OPA1656 is an upgrade to the OPA828. The tip of the equilateral triangle is called the "sweet spot", and is where speakers will present superior localization and spatialization of audio. 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. 4 dB, using A-weighting and a cartridge model obtained here: cartridge model. 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. I like the 627s but prefer the OPA637 for my own system. In other words, the audio stream in the flac file, once extracted by a flac decoder, is bit-for-bit identical to the original. 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. For fun I also simulated the circuit with a "state of the art op-amp" I used for a design (around 40 years ago). #1. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. Jul 18, 2020 · 6. Output signal is amplified 90db. 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. No regrets with this amp whatsoever after rolling. 3e AUDIO TPA3250 - сравниваем разные ОУ - OPA1656, OPA627, Muses01, Muses02, VV4ЖМИТЕ НА КНОПОЧКУ "СПАСИБО" ДЛЯ СЧАСТЬЯ!!Понравилось It's always interesting to hear what the 3. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. I don't care about listening tests or something else, just want to use the technical better one in my amp. Better than 2132, but poor value, as it's about the same cost as 2107. Functional, but not particularly pleasant to listen to. 3V inside of each supply. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. OPA2107: 95%. I have a circuit with two OPA1656's and it so happens that one offset is subtracted from another and almost cancels - in LTspice. ? Yes of course I'll try it. This isn't merely an academic difference, check the noise behaviour of 1656 (top) vs 1642 (bottom). ••• Mar 17, 2019 · About OPA1656 DC output offset: depending on gain, a low level circuit with the OPA1656 can show a few mV as output offset. Budget Audiophile: Finding the best home audio for your budget. The whole point behind pushing for a 3. However, the web page is still marked as "RRO". My PPA with 637/627's sounds great with the Grados, but kind of muffled with the Senns. This is my first time doing anything DIY with audio. Particularly among the lows and highs. Aol for the OPA2134 with a 600 ohm load has an output swing that is 2. OPA1656 has about 6 dB more open loop gain at audio frequencies, so distortion is potentially lower. more reply. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. Not targeting Mouser here , most of the others are worse. There are newer products that are a much better value, even if one chooses not to use the excellent OPA1656, see attached The Anker Soundcore Space Q45 aren't the best choice for neutral sound out of the box. If you're into DIY there are multiple threads here about upgrading caps, op-amps, inductors and even power supplies for better sound. Where OPA827 shines is DC precision (150uV offset vs. Heard it all here with different LS and poweramps. 9 fA/Hz Current Noise at 1 kHz ". That’s not open for debate. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. Comparing the two, to the slightest extend, the opa627 sounds smoother, softer, lighter, calmer. We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption. The AD8620BR, is a very nice opamp and you should be very pleased with it. Now i tested opa1612 with lme49720 and 1612 is better in my opinion. I have a pair of SR-325's and a pair of HD-580's. Bit of a pricey sucker though (which, mind you, is not unexpected Nov 30, 2021 · The output swing for Aol should be considered as it is different between the two devices. Compare them on paper for yourself as to what features or parameters are most important to your design. In terms of performance, the OPA827 is a higher-quality amplifier than the OPA627. 10 years ago using cutting edge silicon meant careful consideration of trade offs as often the absolute best parts had to be spread thinly. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 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. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise Mar 17, 2019 · I didn't bootstrapped the first opamp because I want the first opamp to be as stable, simple, predictable as possible. And the latter are not so expensive as OPA627 or ADA4627. ) Mar 25, 2023 · Performance. The OPA2156 has amazingly good distortion as well, you just might want to load the output a little less than a 1656. 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. I ended up swapping the OPA134's back in. 4nV/rtHz both flat. 500uV for the OPA1656) but that's largely irrelevant for audio applications. #2. The difference between tidal and spotify is really subtle to my ears. Paid Member. 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. After swapping in the OPA604 and the OPA627 during listening tests, have to say the OPA627 is waaay overpriced. May 15, 2022 · forami. Ordered the opa1656 and the new BUF634A. Even at prices you may think are low, they have decent margins. 5 nV/vHz at 10 kHz but they are pricy (€40/pc) ! They are still manufactured and available. #10. Thanks in advance. #12. 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. For Pro applications, whether it be new designs or upgrades, channel and resultant opa count can be significant. THD can be measured without this happening! I completely forgot about it. A worthwhile improvement on 2132. Specs: Very Low Noise: 4. If your phone, MP3 player, computer, etc (whatever your audio source is) has a good DAC then it might be good to Mar 17, 2019 · OPA1656: High-Performance CMOS Audio Op Amp. And of course, the price on the OPA1656 is lower. When I do hear the difference it's usually flac sounding fuller and 'smoother' while retaining all the detail or boosting it slightly. Weight 750 grams. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. The characteristics of opa828 are also very good for audio. So any LF noise from the opamp will get through to the output also. #47. Aug 28, 2009 · In comparing the spec sheets of OPA627B and ADA4627B-1, the current noise specs are identical (1. 5nv/6. And comparing OPA1656 to say OPA1642, OPA2140, etc. 2V inside the negative rail and 2. 5 mm Jack sounds like , but unless you have a quad dac built in it'll only serve as convenient for casual listening. Apr 8, 2021 · Note, I think weight is important to show quality, here you have 750g vs 2kg. Well, listened again last night to AD8610 (unbiased) vs OPA627 (biased into Class A, 2mA, with a JFET) and there is a difference. Your best bet is 8610/20. OPA2227: 90%. These graphs show have different scales. Sep 20, 2023 · Sep 20, 2023. However, they also have a peak in their high-mid, which makes vocals and instruments sound harsh, while the dip in the low-treble veils Sep 14, 2021 · Yes but what's the point except for proving a point? Isn't 3 or 4pF like two short insulated wires taped together. Another surprize , you'd think considering the price and age , next gen OPA827-828 would have replaced the 627. 7. I routinely use OPA1656 and related on adapters without any issues. ---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. 00005% at 1 kHz. 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. Really ? On a new OPA1656 that cost around 0. It's actually because conversion to flac is lossless. 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 $ . OPA1656 sounded worst, Muses 8920 sounded best. mp3 OTOH Dec 10, 2021 · DIY Audio. The only thing I could find was OPA1641 and not even the right package. #693. 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 Aug 9, 2021 · 2021-08-09 3:40 pm. I would not classify the OPA1656 as a high speed amp in this context. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. They have a pretty v-shaped sound profile with extra thump, rumble, and boom, as well as bright and sparkly sibilants. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 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). Mar 17, 2019 · The OPA1641 would be slightly better. Mar 17, 2019 · OPA1656 sounded worst, Muses 8920 sounded best. Some work was also done to reduce common-mode distortion in the OPA1656 when the impedances at the inputs are mismatched. Yes, I think I will just use the old DIP PCB instead of the SOIC PCB. Spotify is behind the curve on the sound quality department compared to Apple Music. The AD745 is a bit of an odd beast, being about the lowest-noise JFET input opamp I know of. • 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 Mar 17, 2019 · Jan, If you take a look at the Absolute Maximum Ratings table in the OPA1642 datasheet it specifies the input differential voltage can reach the supply voltage. As you point out, this is pretty common for JFET-input op amps. OPA2132: 85%. Lower one goes to 100k top to 100mhz. Mar 17, 2019 · IMV your (TI's) recent audio specific parts are a godsend, performance AND price. Log in to respond. com and all are unity gain stable. 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). (Expanded the specs there for ya. ••• Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. Discrete is just bragging rights, stick to the tried & true ICs. 25 V to ±18 V (4. 8 years ago me, great! Feb 1, 2006 · I know that the inputs use a Burr Brown opamp which is higher quality than the TL072 but i am not sure which Burr brrown they are using? If improvements can be made to make this console sound better with regards to the summing that would be well woth an extra $500 to me. You’re going to love the Gen 2 USB C! My Atmos is off, and my Lossless is on. A good candidate for those who want to play, definitely. ••• 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. A discrete wouldn’t do anything o utstanding since the implementation is limited. FYI, “EarPods” are the wired stock headphones that used to be included with iPhones. For the case of AK4499 the preferred opamp might have been different, perhaps due in part to some difference in the particular dac output RF noise. Whether you use those packages as 50 opamps or 25 opamps (since OPA1656 is a dual), is your choice. It has the most stable input capacitance vs. Of course that is because in LTspice all instances of the device are identical. This means that the 827 will be able to handle larger signal voltages and currents than the 627 can. 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. Lastly, I am jealous on the victor oscillator. Another listen. The result is quite spectacular. Audio input: Bluetooth / USB / LVDS / Optical / Coaxial. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Differences in sound quality (to me) are nearly nil. Mar 17, 2019 · 2022-07-15 4:19 pm. , it has at least 5x more noise at 10Hz and below. Mar 17, 2019 · I am using OPA1656 for duals. In the end, it’s an A07. 2023-11-17 2:08 pm. i tryed lme49722 opa2134 and opa1612 , --. 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 OPA1656 delivers a low distortion of 0. Sound is more "color", and "massive". Dec 27, 2019 · Dec 27, 2019. • 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 Mar 31, 2008 · The opa627 does not appear to have its own sound, though it might have deleted some sound, unlike the OPA2134 and AD825 that may add harmonics to the sound. Mar 17, 2019 · 2023-10-18 2:05 pm. w00tah. The main difference you can feel switching from IEM - Headphone back and forth is headphones are able to provide wider soundstage almost all of the time, and IEMs do provide more punchy bass imo. Except opa1656 rest of opamps are available on rsdelivers. Dec 11, 2019 · The SIL uses small inductors on IP transistors. Joined 2011. I looked all over the internet and could found only you who reported a similar • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. OPA2134/2604 is m ore than enough. This can be considered as measurement of OPA828 as a first stage in power amplifier. Jul 4, 2009 · The OPA1655 is the single channel version of the OPA1656. ) For very specific applications that benefit from its low voltage and current Mar 17, 2019 · There are many newer Audio quality Op Amps available, that are much more cost effective than the very old BB DI products. Jun 8, 2023 · When the datasheet was revised due to the addition of OPA2828, the notation "RRO" was removed. kozzyosko December 10, 2021, 10:34am 1. I must test muses now. Since I am not interested in the V6 Vivid Dual that it comes with. Morel Supremo 602, Dynaudio Esotec 362, Hybrid Audio Legatia, Focal Utopia if there is no budget and you want to spend a few thousand on component speakers. However, it doesn’t sound like those two chips at all! It’s very musical imo. (RL is the original 2kΩ. 5 mm jack imo was to try and get the phone manufacturer to put audio quality higher on their agenda. OPA1656: 3Mb / 42P [Old version datasheet] OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers REVISED SEPTEMBER 2022: OPA1656ID: 3Mb / 38P [Old version datasheet] OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown??Audio Operational Amplifiers DECEMBER 2021: OPA1656ID: 3Mb / 42P 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. I found the OPA627's produce a very different, much clearer, but less mucical sound than the OPA134. 9nV/rtHz vs. Mar 17, 2019 · The OPA627 was released in the 90s and we're still selling them in high volume. The BA is only an indication of "grade" for certain tolerances for optimal conditions for use. Aug 24, 2012 · Member. Mar 17, 2019 · During the warmup period, the servo output slowly drifts up because there's a small output DC before the HV comes on. In fact, I had put in Yanasan's dual 4499 dac the OPA1656 as I/V converter and the OPA828 as diff/ SE summing. • Audio Effects Processors • Musical Instruments • A/V Receivers • DVD and Blu-Ray™ Players • Car Audio Systems 3 Description The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. The OPA1642, however, is also LESS expensive ($2. solderdude said: Actually the SIL opamps are pretty good. 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. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. Jun 8, 2023 · When you say (in the context of audio), do you mean subjective sound quality? If so, the data below may not be what you want. The AD8620,627,637 are in a different league then the 4562. 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). I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Feb 29, 2008 · The LM4562 is a nice opamp and won alot of awards when it was released for the performance to price it is good. 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). Hence the numbers. I agree as well. We focus on education, discussion, and sharing of entry and mid level separate & multi Mar 17, 2019 · 2019-07-04 11:22 pm. LME49720 sound is boringand too light. Jul 26, 2022 · The DC servo opamp has the most impact on the output at LF, as it should. It’s a full rich sound with great vocals, detailed highs, and beefy low end thanks to the opa2604 and the Mullards. It offers exceptional performance in almost any audio application. Dec 16, 2008 · To put some opamps on a scale: TL072: 50%. The OPA1652 and OPA1654 op amps offer rail- May 19, 2004 · Joseph K. 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. EntertainmentDue8669. These combinations should be equal to a single op-amp noise and 4 paralleled op-amps noise. 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. 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 · I purchased 10 OPA1656's. Mar 17, 2019 · The OPA1656 specifies THD+N at -130dB @ 10Khz and a BW of 80Khz, why is that, how does the spectrum look beyond 80Khz ? Late to the party, but: this is typical of such measurements. 9 $ , they have a decent margin ? Jan 6, 2003 · EchoWars said: Did another preamp where +/-15V was used, and sprung for a OPA627A. I think it's a matter of circuit design and implementation. Jun 8, 2023 · With OPA827 and OPA627, the second harmonic (40kHz) was larger than the fundamental wave of 20kHz, and 40kHz was regarded as the fundamental wave, so THD could not be measured. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. FLAC is supposed to contain an objectively better audio quality than mp3 because it has a higher bitrate/bit depth. It’s $11, fr reputed BurrBrown/TI. Since you . Audio journey is amazing! Take your time, you matter most. 900mW (<1% THD) at 300Ohm single ended with +-24V supply is very nice imho. The common-mode rejection is identical at -116 db, and the THD specs are also quite similar Mar 17, 2019 · But if you'd rather buy the OPA2156, more power to you! The OPA1656 has 6dB more open loop gain at audio frequencies, hence the better distortion. Especially the distortion characteristic is the best among monolithic OPAMPs Mar 17, 2019 · 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. Jul 25, 2021 · A pair of *genuine* OPA1656's is the consummate and necessary upgrade for it's stock NE5532 opamps. Using AUX in, the audio quality is based on the source device's digital to analog converter (DAC). View attachment 1100451 View attachment 1100452. Pros: Sound quality is better, Suggested playlists/songs are better, I like having access to the music videos, Better payout to artists Cons: No collaborative playlists (this is the #1 thing that would have me switch back to Spotify), Can't just search for playlists made by other users, MQA is worthless, Seems to have issues with really long • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. You'll need 25 packages to stay within the die temperature guidelines. However I have a couple PCB that use singles. The servo opamp output feeds the circuit through perhaps 5k total load. (OPA1656 gets close but, being MOSFET input, has more 1/f noise. I used 4 Burson V6 Vivid in my Burson headphone amp but I have replaced them all with OPA1656. As far as I know, the +/-15V stays up stable and clean during the start-up process, but I haven't looked at in detail. Jul 12, 2004 · OPA134 Hi Jay: I recently swapped out a pair of OPA134's that I put in a California Gamma DAC (PCM1710) with OPA627's. A TSSOP8 to DIP8 adapter should work. Less conversion and no signal drop. Can't say much on sound quality. 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. 000. #791. Overall a very pleasing combination all round and a great sound for little money comparatively. The A07 now gives a very pleasing, laid back and an analog, almost vinyl-like sound quality to the music! Bass performance is also quite noticeably improved as well. 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 Mar 17, 2019 · Joined 2011. Jun 8, 2023 · I believe that, as is usual, it is better to make even more measurements and then try to draw conclusions. #29. http The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. This isn't usually a problem in I/V stages. ) That really depends on the circuit. May 23, 2016 · Q: (better) alternative for OPA627 ? Hi since end of the 90's the OPA627 has been a very good audio grade operational amplifier. The FET-input architecture achieves a low 2. 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. 6fA @100 Hz), and the voltage noise favors the 627 only slightly (4. 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. 08 @ Mouser). Same goes w the Bursons. It is a known fact that Apple Music has better sound quality than Spotify. Over a 20 kHz BW my simulation shows a noise difference of 0. JL Audio, Image Dynamics, Karma Audio can be added to my list too. Great value for money, but bass is indistinct. Jul 12, 2004 · 2004-07-14 8:13 am. However, it may be the data that supports the sound quality impression of tombo56. 55), but in inverting mode only. The sound quality with Apple Music is sublime. Finally, 3e Audio has instructions (attached) how to add a post feedback filter USB is beter than both by a long shot. Place the speakers "at ear height". Amazing value and no more urge to upgrade. For comparison reference, the waveforms of RRO type OPA1611, 1641, 1655, ADA4625-1, and non-RRO type OPA627, 827, LME49710, ADA4627-1 are attached. OPA627 is a single channel op amp. 5V inside of the positive rail . The LM4562 sounds more detailed, live, colourful, and eventful. My Pimeta with 8610's sounds great with the Senns but just about fries my head with the Grados. 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. r/audiophile. Hello together, i want to put one of the mentioned OP Amps in my amp. The AD8610 seems to present a more open window, especially in the highs, on music, transients and realism of highs being enhanced. 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. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. Jun 28, 2004 · The two are synergistic. 1nv). The 827 has a gain of 22 MHz while the 627 has a gain of 16MHz. I added a bit of gain in each opamp at the output stage to utilize the RRO of opa1656. Previously they were JRC5534 then OPA134 and I was looking for something like the OPA1656 but single. Mar 17, 2019 · 2019-04-21 2:49 pm. cx ey zz lg in iu fm sh qc ht