Opa1642 sound quality forum common mode voltage that I've measured on any op amp. It would involve around a quality 4 pins connector that will carry +/- 12V and likely 5V plus GND. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. opa627 (in dual), lt1028 (in dual), lm6172 is too much speed, and are unstable in my tube-opamp hybrid preamplifier. Excellent sound quality. Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. A circuit with OPA1642 would have first stage - impedance converter (G= 1V/V) and second stage - gain control. Jfet inputs, reasonable bandwidth, low quiescent current, contained cost make them a reasonable swap for tl07x or opax134 but TI improved their common mode distortion quite a bit. now it is proven that problems linked to power supply problems (observed by onlyoneme) . I don't know all the differences between the two parts, OPA2140 is obviously trimmed for lower offset and therefore more expensive, but no idea if there are any other differences and what they are. The noise contribution of the LF353 opamp is 2. These sound great and outshine many of the other modern high performance audio opamps out there today. Nov 2, 2022 · Part Number: OPA1642 Dear Person in Charge, I'm looking for graphs on the performance of this parts. Aug 16, 2022 · Choosing the right audio op amp in different contexts: Parts discussed in this thread: OPA167x, OPAx134, OPA165x, OPA1622, OPA160x, OPA1692, OPA1611, OPA1632, With so many different audio op amps available from TI, it can be difficult to determine which one is right for you. I now have noise level of -93 dB , THD of 0. Output Current characteristic curves seem to behave in opposite manners. Neutrik RCA female connectors. The sound is now significantly better. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. Jul 4, 2009 · The biggest difference sound wise between the ak4497 and the ak4493 dacs is that the latter is less detailed but has more of bass-er sound with the sound being in the foreground. Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1642 Series Audio Amplifiers. 00005% at 1 kHz Apr 27, 2023 · OPA1612 with ultra-low noise and low distortion 1KHz 0. Hello, I am looking at replacing the old JRC opamp in my phonostage of my amplifier. 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. Oct 17, 2024 · OPA1642 seems to be also reasonable choice for impedance converter. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. Jul 26, 2022 · What about OPA2140, the non-audio / general purpose instrumentation version of OPA1642? Mouser has a bunch of stock for the SOIC-8 package. Before any modifications I use shematics to see what i need to choose between these four Op-Amps. Mar 16, 2025 · Input Buffer for Hypex NC500 and Purifi Audio The Hypex NC500 and the Purifi Audio 1ET400A are two single-channel, extremely high-quality, analog input power amplifiers modules which operate in class D. My opamp preamp has a mediocre PSU, good quality parts but standard regulators, imagine the SQ with Jung regs Jul 19, 2023 · The most ”spacious ” perceived sound with the biggest soundstage was with opa1642 - but the bass pitch wasnt as clear to follow in the music listening as it was with the lm4562. The point is upsampling will improve the sound and some approach seems better. It has TSpice model, so I can test it later. It needs an adapter though. I'm looking for opamp better than OPA2604 witch big soundstage, and "analog" like sound? But e. Oct 10, 2014 · Первые думал менять на opa2209(несколько заменил уже) или opa1642, вторые и третие уже заменил на opa1642/1644. 00005% at 1kHz. 00005% at 1 kHz Nov 7, 2018 · 中频略砂，低频弹性十足，声场亦可称之宏大！opa1642非常适合高频信息丰富的音乐，譬如钢琴，弦乐。但是需要注意，它本身纤尘不染，必须在非常干净的系统中，才能有优秀的发挥，否则会听出燥的感觉。 May 12, 2025 · OPA164x/OPA164x-Q1 op amps offer superior sound quality and rail-to-rail output swing that allows for increased headroom, making these devices ideal for any audio circuit. OPA1642 also sounds decent, is reasonably priced, and would also require a DIP adapter. Features include 5. Which one has better electrical Jan 14, 2025 · It has JRC NJM4558D/NJM4559D and I was reading about OPA2134, OPA1642 or OPA1656. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. The OPA1642 is also theoretically the best choice for the unity and x2 stages in the output buffer, although the LME49720 is a very close second. Dec 10, 2015 · And the newer JFET parts from TI (OPA827, OPA1642) show the best performance. Aug 29, 2016 · I am looking for appropriate OP-Amp type to get a sonic character like phono-preamp model like EAR834 or similar I have heard, that OP-Amp IC types like follow are good therefore, because one will get sound like tubeamps: 1) AD817 (used in SLEE from Graham) - go to Vinyl Asylum 2) AD746 = dual Nov 9, 2012 · - MUSES8920 is very balanced and could be used in I/V stages without worries, because this is what this OPAMP has been made for. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. There is also a TLE2072CP in the preamp section of the Puccini SE that I wonder if it could not also be interesting to swap for something better. 00005% at 1 kHz Texas Instruments OPA1642 Series Audio Amplifiers are available at Mouser Electronics. Apr 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. Jul 4, 2021 · OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. Update 2: I’m now staying with the LM4562. . When I do serious listening test between them, just an A - B testing, not back and forth, I found the OPA1642 creates more noise at upper frequency because of those high frequency details. Mar 7, 2019 · Sometime I use OPA1612, OPA1642 and OPA1622. Dec 8, 2023 · Other suitable choices would be OPA1641 / OPA1642 or similar. OPA1642 Datasheet PDF TI The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Also there are opamps like MCP6286 which has only about 500uA quiescent current but Vdd-Vss max of only 7V. but you could also check out: OPA1642, OPA1678, OPA827, and the newer OPA828, or also OPA2810 Dec 6, 2018 · Just replace the original op-amp with one with a similar specification, if it's not possible to find an exact replacement. Listening only after ”hifi jargongs” like soundstage depth and width, then the opa1642 was the winner. Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. The main reason I can't perform the test is because the current setups of mine are all soic8 package. Jan 16, 2021 · It might be that I should do a new thread, documenting what I'm doing, but basically what I've done is swap the TL072 for an OPA1642 (assuming not fake). For several reasons: Firstly I don't think that would be difference in sound quality. Svadim79, if you have some DC voltage between the inputs of the I/V converter, maybe opa1642 is better. Apr 20, 2011 · These short audio clips should help to illustrate the difference in sound. or so) of an unshielded LME49720 have been observed to produce periodic FFT spurs (@ 100Hz intervals, IIRC??). Cartridge load components, both R and C, can be altered without soldering, allowing for loads from a few 10s of PF to uF. It doesn't have that airiness that AD op amps have. The GBW is a little small but who know, maybe it sound very good, why not. There is one “ribbon” that moves to changes in sound. Mids and details are sharp, analytical. Especially the distortion characteristic is the best among monolithic OPAMPs Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. It really does still sound very nice in my system and the MC phono stage is excellent, quite surprising after having used various hi end preamps over the years, It uses NE5532's or Jul 4, 2009 · I had AD8620 before and I think this OPA1642 has a narrower soundstage. The current noise paired with high source impedance translates into additional voltage noise on the input and this gets amplified by the gain in the design. Part Number: TL072 Other Parts Discussed in Thread: TINA-TI, LF356, OPA627, OPA1642 Hi ti Team, I am trying to boost a passive tone stack with a TL072, 9V, single supply. MUSES8820 is the best, IMHO. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Just did an A/B with 2 opamp buffers on my Hypex NC500 monoblocks, which I normally use with no buffer, as the dac has enough gain to drive the NC500 modules direct. Aug 10, 2022 · The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. This doesn't sound bad at all , of course not. These three Op-Amps sounds great. Power amplifier AD8397: serves as the current amplifier, with great control of low frequencies and smooth drive ability. Mar 17, 2019 · The OPA1641 would be slightly better. 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. 72uV---about 11 db less. OPA2828, OPA1612, OPA1642, OPA1656, OPA1652/78 (dual) plus OPA1644, OPA1654 Mar 20, 2018 · Tested the OPA1642 for the I/V of D10. Part number: OPA1642AIDR; Manufacturer: Texas Instruments; SOIC8 surface mount package Jun 19, 2021 · The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. 8 mA per channel. Wide range of supply voltages (typically +/- 24V but could drop to +/- 6V or +/- 12V) 8-9 mhz is fast enough for the GBW. - MUSES01 outclasses all the OPAMPs from above when used in I/V stage of a DAC. I'm with Jim here. opa1642系列运算放大器具有单增益稳定性，在各种负载条件下都能提供出色的动态性能。 双通道版本具有完全独立的电路，即使在过驱动或过载时，也能将串扰降至最低，并避免通道间的相互影响。 The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. This thread has been locked. Aug 16, 2023 · Help Support GroupDIY Audio Forum: and infer sound quality from that noise floor. 12V). I have drilled down datasheets until my eyes ache. Mar 17, 2019 · The Vendor's Bazaar forum is for commercial offers and transactions. The newly created question will be automatically linked to this question. Aug 20, 2019 · Unfortunately yes and it is overpriced but end of the day it sound better ( Significantly better like you listen to new version of the song) that my experience with it and even though I will not buy it even and rather invest in a better speaker for example. I tried a variety in the headphone section, but didn't like the sound of the faster, modern op amps so used a new 4558 in one, but it doesn't sound as good with my headphones as a 5532, so my other 2 have those. I have found a part from LT that specs very well, but is 2X the price. SS5: The tighter bass gives it a bigger bass slam. What I was hoping is that by upgrading the preamp, it would improve the sound quality (if only a small amount). Feb 7, 2018 · So what would be the best practice of protecting typical op-amps like OPA1662, OPA1652, OPA1642, OPA1678, NE5532, TL074, RC4580 etc from input overvoltage in typical audio input scenarios? Op-amps can often have different types of internal diode protection between inputs and/or to the rails - do these op-amps have it, and if so, does it protect The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Anybody know beter opamp than OPA2604 with realistic "analog" 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 Jul 18, 2021 · OPA1642 is its replacement despite the lower type number. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. Mar 8, 2013 · I hope to enhance sound quality, of course. 1nv/√hz at 1khz ultralow distortion: 0. Texas Instruments OPA164x/OPA164x-Q1 SoundPlus™ JFET-input, ultra-low distortion, low-noise op amps are fully specified for audio applications. Jul 4, 2009 · I soldered OPA1642 today to my card with 8 small wires. OPA Conclusion. Naturally it's all a matter of taste and also depends on the neutrality of other components in the chain. Of course replacing the internal switchers for a linear symmetric PSU will bring more than any opamp rolling. My Pedulla Rapture 5 with Q-tuner pickup was sent straight into both amps, and run passive for this comparison, IIRC. There are a few “naturally occurring” figure eight microphones. The OPA1642 is “one step down” but still very highly rated, and it is JFET-input which should give a low enough DC-offset to be used directly in this kind of application. Two identical gain 11 amplifiers were tested. Jan 15, 2020 · Well, darn it, got my "free for evaluation" Burson Audio V6 VIVID dual op amps today, and as I feared, they won't work in the original Aiyima A04 or A07 - small surrounding caps are too close for the bigger VIVID amps, even with the lifters. 1-nV/√ Hz noise, low THD+N (0. ” The power was increased by 50% (450mW vs 300mW), total harmonic distortion (THD) was drastically lowered (0,004% vs 0,009%), battery lasts a lot longer (17 hours vs 10 hours) and sound quality is infinitely better compared to the original E11. The design has a passive EQ for the higher frequency pole, EQ in a negative feedback loop for the lower pole. By: Search Advanced search… opa1642 特性. It works but it sounds really low. OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Recently I changed OPAmps in my Purify amps and noticed huge difference Apr 27, 2023 · DMP-A6 GEN2 Color: Black 6" LCD touchscreen 4GDDR4 +32GeMMC ES 9038Q2M*2 XMOS XU316 Music streaming services OPA1462 op-amps Linear Power Supply HDMI ARC DC trigger MSRP: $859 DMP-A6 Gen 2 High-Fidelity Music Streamer Hi-Fi Music Streamer That Combines Exceptional Sound Quality With Futuristic Part Number: OPA1642 Other Parts Discussed in Thread: OPA1612, , OPA1652, OPA1688, OPA1662, OPA1602. All the amplification stages are based on top-quality audio op-amps such as Texas Instruments' OPA1642 for the phono stage and OPA1612 for the Line OPA1642 OPA1641 OPA1644; 描述: OPA1642 Sound-Plus High-Performance, JFET-Input Audio OpAmps: OPA1641 Sound-Plus High-Performance, JFET-Input Audio OpAmps The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Oct 8, 2021 · 2x OPA1641 or similar or OPA1656/OPA1642 FET input opamps for MM- also providing extremely high S/N with high cartridge resistance/inductance. Thank you and Regards, Luis Aug 14, 2023 · Only TubeDepot hookup wires were used (those come pre-twisted for noise cancellation). Very nice presentation in the link! Thank you. OPAmps do make a lot of difference in sound quality. First one here will be middle price opa1642 from china with 1,45$ price with shipping from china. Then I found this forum and found this (part of your message) on USB-C Microphone. In particular, IIRC, DECT wireless phone base stations in the near vicinity (say, maybe, 10ft. Jul 19, 2023 · I've been reading posts about replacing better quality components on a minidsp 4x10 and wondered if I could do the same with my minidsp 8x12 v2 DL. Feb 7, 2014 · I've built quite a number of phono preamps including two diferent ones from Oatley Electronics (tube\\jFET), Silicon Chip and Boozhound labs. 25V to ±18V. The OPA164x/OPA164x-Q1 op amps operate over a very wide supply voltage range of ±2. Great layering everywhere and a very life and sparkling sound. Jan 21, 2006 · Update: I’m now getting a hissing sound when powering on and off the amp with the opa1642. Old op-amps such as the LF412 and TL072 are more than good enough for 99% of audio applications. I too find that the OPA1612 and OPA1642 are fantastic upgrade/replacements in a whole lot of professional and consumer audio gear out there equipped with comparatively outdated opamps. Aug 3, 2019 · The OPA1642 is the best choice that you can make other than incredibly expensive ones that provide very, very, slightly less noise and higher distortion. I upgraded the volume pot and built an external large transformer power supply (in lieu of a "tap" from the original power amp;s transformer). If I was chasing that OPA1642, OPA1652 or OPA1656 would be the best choice right now. You are right, OPA1656 is interesting part, but as anything in engineering field it depends on user case and circuit environment. This has been built and is my current phono amp in use on a regular basis. Not finicky to bias currents to the point of oscillation. Superior Sound Quality; True JFET Input Operational Amplifier With Low Input Bias Current; Low Noise: 5. The NJM4560DX does not appear to be FET type, though I thought a FET type like OPA1642 would suit this circuit? or maybe OPA1612 which isnt FET like the Oct 29, 2009 · I had given up using it because, from reading this forum, had figured that would work best to build a new circuit with two opa1611, and although more work (and money) might be worthwhile to design and build. 00005%), a low input bias current of 2 pA, and low quiescent current of 1. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. FAQ . Tighter bass with good acceptable body. Hi team, The following two sets of Output Voltage vs. May 13, 2015 · Forum Rules. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. Sound-stage increases, sound becomes more detailed without being harsh or sounding Feb 11, 2021 · BTW, the Audio Research is sold because of that! My own Nova preamp was a Stereophile (the US magazine) reference, sounds more or less terrible in comparison. I don't care about listening tests or something else, just want to use the technical better one in my amp. I’m not liking that, so I’m back to the opa 627. Will come with high quality wall power transformer. 00005% at 1khz high slew rate: 20v/µs unity gain stable Aug 2, 2024 · Yes, I have now used OPA1642 in all of my Apt preamps, except for TLE2072 for volume. 54 uV, based on the datasheet's 18nV/√Hz voltage noise spec; the OPA1642's noise(5. I have OPA1642 on my amplifier too so this is very much laidback sound. On a subjective basis, its clean, precise and provides an open sound stage. Jan 7, 2020 · Agreed. Very quiet, and sounds great, especially that this is a chip designed for audio only. 00005% at 1 kHz Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Currently I want to ask about circuit I posted yesterday. Log in Register. 1 nV/√ Hz at 1 kHz; Ultralow Distortion: 0. List the graphs I'm looking for. Really good ribbon mics are both expensive and delicate. “If you use OPA1656 / OPA1642, the SINAD will get 1dB to 2dB more because of fet input lower noise on higher value source resistors. Today all chips for comparing from china and price I will write total with shipping. Dec 11, 2024 · I tested Topping PA5 II, 3E-Audio A5se, Aiyima A70, D05, A03, B01, Fosi ZA3, V3, O-noorus D1, D3, D4, DA10 - if I had a lot of money, and a whole shed to store the equipment, then perhaps I would not have to sell one amplifier to buy another for testing. My Boozhound Labs\\Jean Miraga MM\\MC stage have been in heavy use for some time now. The regular OPA’s sound is more concentrated and they aren’t as spacious as both the Burson Feb 4, 2014 · The thread was started in 2014. The sound itself resembles a lot to that of E10K, it’s even a little better. Jun 8, 2023 · No doubt the OPA1642 is a fine opamp and I can imagine people like it's warmth and punch, but the OPA2828 is simply on a different level. Maybe the amp doesn’t like that chip, not sure about the hissing. High quality soldering job with eutectic Cardas solder and everything was inspected with 50X microscope post-assembly. May 12, 2023 · Search titles only. For an improved, general TL072 replacement, I would suggest the OPA1642. Any way, it is also Mar 17, 2019 · The OPA1641 would be slightly better. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. OPA1642 This comparison is also interesting, just to see how popular op-amps like the 5532 and the OPA1642 compare (not good at all). 000015% (original has OPA1642) Just spreading the news, I have no affiliation with the link or Eversolo. Apr 25, 2024 · The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. superior sound quality true jfet input op amp with low input bias current low noise: 5. OPA164x/OPA164x-Q1 op amps offer superior sound quality and rail-to-rail output swing that allows for increased headroom, making these devices ideal for any audio circuit. I searched and find that it needs a proper audio interface which is out of my reach. OPA1656 sounded worst, Muses 8920 sounded best. The THD of the OPA1642 is also an order of magnitude less than the LF353. NE5532P vs. Sound is neutral and balanced with good sound-stage. It has the most stable input capacitance vs. A lot times, delays, modulation pedals, compressors, boosts, buffers, mixers, adc, dacs, etc sound good with a good audio. ・Relationship graph The OPA1641, OPA1642, and OPA1644 rail-to-rail • ULTRALOW DISTORTION: 0. For high source impedance sensors such as a phono cartridge lower current noise is better. Treble extension and layering comes out while the mids sound more spacious. 00005% at 1 kHz Dec 9, 2024 · Part Number: OPA1642 Tool/software: Dear Texas customer support, We have used component OPA1642AIDR a few times in our production. May 15, 2022 · Buggle2 Riaa board. I like Hifi sound, this isn't as dry as LME49860. Replace OP amps. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Thanks in Pre amplifier OPA1642: serves as the voltage amplifier, with great layering and medium and high frequency extension. May 6, 2022 · Good morning. Jul 22, 2023 · Sound quality and power are affected by configuration. Measurewise there's not really a difference comparing OPA2134. But lately I have been using a very simple OPAMP based preamp developed The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Mar 5, 2018 · However, swapping opamps seems to be more dependent on the surrounding circuitry, their quality and PCB layout, than the opamp itself. Nov 30, 2021 · Part Number: OPA2134 Other Parts Discussed in Thread: OPA1656 , OPA134 Hi Team, My customer wants to replace OPA1656 with OPA2134. I'm still likely going to get one unless iFi comes out with an updated Zen Stream soon. Feb 17, 2023 · If I'm not mistaken, opa1642 is a real JFET. May 23, 2018 · Sorry I can't compare the sound of these opamps. but Oct 9, 2024 · OPA2228 vs. I use one with an old Hagerman Bugle power supply (+/-15VDC using standard regulator ICs) and it sounds really good and has very low noise. (In order to improve the quality of sound. The first clip is taken from the output of the stock WT-300 preamp, while the second is from my modded WT-500. Dirt pedals, depends on the design. Jul 5, 2016 · I'm not sure what your 10K resistor has to do with anything here. Even when it would it is really small and you can't say which is better. The sound was okay, but then I swapped the NE5534 for a Burson Audio V7 Vivid pro Single. For some reason I refuse to use it as often as I can though, being CMOS. Similar Sound compared to OPA2134 but Bass is little better under control. I've done nothing else. As an aside, the use of a FET device as the input stage will also provide good RFI proofing. The thing is I have no idea if that would improve or lower the sound quality. Should I first replace all through-hole capacitors with better-quality caps of the same rating? (couplings - Nichicon Muse bipolar) Could I OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. May 22, 2015 · I recently reconnected a DIY kit preamp (Series 5000) I made in the 80's. But the NJM353 is FET and probably you'll be better off with the OPA1642 (which still looks superior to OPA2604 and all the rest of the FET things, excepting maybe the ADA4627-1) than with the OPA1612. 0021% , tested loopback with RMAA. Sound from the front or back moves the ribbon where sound coming from the side of it doesn’t. May 17, 2016 · SS4. Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652 , OPA1662 , OPA2141 , NE5532 , OPA1678 , OPA1679 , OPA1688 Hello, I was looking for information TI E2E support forums Search Oct 2, 2021 · Audio Newbie/Beginner Technical Forum . Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and improve sound quality. Modern op amps are so good at working in "bad" environment that they retain quality very well. Some dirt pedals sound like crap with a good opamp - Dist+, Crowther Hotcake, SS2 and many more. They are capable of over 400 W of power and provide an audio quality level that sets the standard for power amplifiers of any operating class. The OPA1642 is a FET, and despite of that (I don't like FET op-amps sound in general), I actually like it's sound, even it this particular deck, despite the insane noise. For OPA1642, the output current (limit) appears to increase with increasing temperature. Jun 18, 2019 · Excuse me, it's not the OPA1642, it's the TPA6120A2 vs OPA2134, which one is better for audio, which has better quality, thanks. Audio Asylum - Tweakers' Asylum - Tweaks for systems, rooms and Do It Yourself (DIY) help. Действительно стало слышно некий дисторшн, видимо от оставшихся mc3078. 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. The dip in the THD+N curve for the OPA1642 is a range-switching effect on the Audio Precision and not the actual behavior of the op amp. It has rail to rail differential inputs, it doesn't have antiparallel diodes. It measures better to, with LM4562, but the difference is much smaller than the sound differences. Nov 17, 2021 · OPA1641-1642-1644. I can easily compair them , one with NE5532 and the other with LM 4562. output swing allows increased headroom, making • I wasn't complaining about the OPA1611 , just as an example of bipolar NPN input opamps , like the OPA1622 , or AD797, NE5532, OPA1692, Anyone know whether the LM4562-LME49710-LME49860 series are PNP input or NPN . Architecture is fet. I took time and so did Sachin on boards. Sep 11, 2013 · ADA4627-1 is my current favorite sounding JFET op-amp, though it is single, not inexpensive, and would require a DIP adapter. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. I have tried placing the tone stack between the two op-amps, both decoupled, with one or the other op-amps set as a buffer, and the other set to boost. Sep 12, 2024 · So, with my very low knowledge and skill I built a opa alice circuit with opa1642 and jli-2555b in a bm800 body. OPA1642是TI公司的一款精密放大器产品，OPA1642是Sound-Plus 高性能、JFET 输入音频运算放大器，本页介绍了OPA1642的产品说明、应用、特性等，并给出了与OPA1642相关的TI元器件型号供参考。 Oct 10, 2020 · In the case of Aiyima a04 ( I have two of them ) it is very clear that the sound quality gets better with LM 4562 instead of NE5532. The characteristics of opa828 are also very good for audio. Mar 19, 2023 · I can vouch for the Elliott Sound Products Project-06. Below is some feedback from Lester from SylphAudio ( @jlesterp ) when I shared my measurement results with him. The X5 3rd gen utilizes two dual-channel OPA1642 chips for its low-pass filtering stage and a custom-made audiophile-grade OPA426 chip for amplification, providing greater power output (up to 300mW under a 32Ω load) and greater ability to deal with capacitive loads. ) The source I want to use is high quality and i want to make the best of it. Ribbon mics are inherently figure 8 by virtue of how they work. 1nV/√Hz) would be 0. In 2022 one would suggest OPA1642 and OPA1656 methinks. Fully differential true 24Bit R2R DAC Resistor Arrays | NOS/OS dual modes High quality electronic volume control NJW1195A 1300mW+1300mW high output power | 3 gain levels, 3 volume curves Specially-designed audio circuit | Specially-designed power supply High-quality Beryl solid capacitors | Custom LCD screen | RGB logo lighting Mar 19, 2025 · I built an amplifier with a Chinese circuit board (CRM-Tech, TDA7293, OP NE5534, and OP07 Servo). In the previous orders we Apr 27, 2023 · don't worry, I know a little we are on the basis of 100 dollar dacs on this new entry-level akm and moreover in relation to the tests carried out at the vintage era "pre-serie", wiim had to debug in hardware this version quickly to release a new one version because of real problems in audio. Getting a Dual Ak4490 mono portable player DAC will bump the specs per channel dbs but they are around 300+ and probably sounds better than many Ak4497eq single chip OPA1642 SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers. OPA1642 looks good on paper, better when you read the chatter from TI engineer on the project I would worry that there simply isn't enough low pass filtering on the board for the MASH output - even if it were a few bits multibit D-S as the latter MASH Feb 25, 2023 · OPA1642 would have been a good choice and these consume less than half the power a OPA2604 consumes so the heat is self inflicted. @abbey road d enfer what circuit are you talking about? At first OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 1 nV/√Hz at 1 kHz • Ultralow Distortion: 0. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. OPA1642 halves the current and will leave almost 42V for the bias (6800/2*1. Every amp. 1-nV/√Hz noise, low THD+N (0. 电子发烧友网为你提供ti(ti)opa1642相关产品参数、数据手册，更有opa1642的引脚图、接线图、封装手册、中文资料、英文资料，opa1642真值表，opa1642管脚等资料，希望可以帮助到广大的电子工程师们。 May 3, 2023 · Focusing on a practical, hands-on perspective, George Ntanavaras, details the design and construction of a phono preamplifier for Moving Magnet (MM) cartridges and a Line/Headphone amplifier with two additional inputs and volume control. Apr 10, 2023 · Next here will be chips with middle results wich is possible for using but real quality of sound is not best from it. Jun 28, 2013 · Upon receipt, I opened the case to examine components and solder quality, and found what is ever present in auto amps, and that is signal components, like op-amps and electrolytic caps of poor quality and inexpensive price, seriously degrading the ability of the amp to produce true high-quality sound. Aug 1, 2018 · Well, using the OPA1641 vs. 00005% at 1 kHz Oct 5, 2020 · IME they are very good audio opamps, but a possible weak point may be their sensitivity to radiated RF. For the case of Jul 5, 2006 · It's well known that all the rest being about equal, bipolar opamps will sound better (and distort less) than FET input's. If you have a related question, please click the "Ask a related question" button in the top right corner. However, it may be the data that supports the sound quality impression of tombo56. One good example is XU09 portable headphone amplifier. Jun 11, 2017 · - OPA1642 as a input buffer, - Walt Jung multiloop support, - most parts are SMD from 0603 to 1210, - hi quality decoupling for chips based on low capacitance 0603 caps (like 100-1000pF) and a pair of 1206 + tantalum 1210 caps, OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. OPA1656 (CMOS) on an adapter is a winner too. Mar 21, 2023 · The OPA1656 (gain bandwidth product, GBW=53-MHz) and OPA1642 (GBW = 11-MHz) have a different bandwidth and we would need analyze the complete audio active crossover circuit to analyze stability and determine the issue. NE5532 are in the analog output stageof the AA cdplayer Paganini 24/192, NE5534 are in the power stage of the AA integrated Puccini SE. g. 8mA = 6. I wouldn't want a rat with an opa2134. OPA2134 is basic hi quality Op-Amp and all rounder Op-Amp with great sound. I don't mind soldering a socket and using an adapter for smd opamps. hfkyb tgmcl ujqk zmwmay adg kgrgg tysbegu gexp hxcllgm oekrl
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