Opa1612 vs opa1642 sound quality

Opa1612 vs opa1642 sound quality. So, it is a different design and chip. The higher current drive of the OPA2822 would be beneficial. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. Superior Sound Quality; Precision Operational Amplifier OPA1612 — SoundPlus™ Audio Operational Amplifier with 1. These sound great and outshine many of the other modern high performance audio opamps out there today. I use the the 1641 in my Marchand XM44 to replace the OPA2134 as it is a JFET. The OPA1602 and OPA1604 series of op amps offer rail-to-rail output swing to within 600mV with 2kΩ load, which increases headroom and maximizes dynamic range. Jul 4, 2021 · This doesn't look like a high quality pcb and it would be easy to lift traces. All the amplification stages are based on top-quality audio op-amps such as Texas Instruments&#039; OPA1642 for the phono stage and OPA1612 for the Line 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. 00005% at 1 kHz. It measures better to, with LM4562, but the difference is much smaller than the sound differences. Also, I am in talks with Burson Audio over this. common mode voltage that I've measured on any op amp. The AD opamp is more expensive though than the OPA1612. 1nV/√Hz JFET-input audio op amp OPA1642 May 6, 2022 · Opamp better than OPA2604 with big soundstage, and Mar 22, 2022 · OPA1612 (soic on dil adapter board), bi-polar from input to output, again a very good opamp, which to me "sounds more balanced" top to bottom than the LME, it is just as dynamic, but just a little less obvious in the bass leading edge because the mid-range seems a little more fleshed out rich and full bodied, highs are just as good as the LME. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). But I really like the FET's in that position. Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. Jun 8, 2023 · THD=-117. For high source impedance sensors such as a phono cartridge lower current noise is better. 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. 1-nV/√Hz noise, low RC4580-Q1 - Automotive Catalog Dual Audio Operational Amplifier; OPA1642 - Sound-Plus High-Performance, JFET-Input Audio OpAmps; OPA1612 - SoundPlus™ Audio Operational Amplifier with 1. 00005% at 1 kHz Feb 11, 2021 · I think the problem I'm seeing with the OPA2156, and to a lesser extent the OPA1656 is that the 1/f knee for the noise is much higher than for the OPA1612 and OPA1642. Strange but found too many times to ignore it. OPA1641 data sheet, product information and support OPA1612 Dual OPA DIP8 (Unit) Feb 11, 2021 · looks very similar to the eighth image from post #2 of Bel Canto's S300i/S300iu - driven by dual mono Icepower amplifier modules with switch mode power supply - go to Inside the Bel Canto S300i integrated amplifier | Audiokarma Home Audio Stereo Discussion Forums and Bel Canto e. Regards, Richard Last edited: 2010-01-18 4:37 pm Jun 5, 2023 · The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). 00005% at 1 kHz The high bandwidth and high open-loop-gain design of the OPA165x delivers a low distortion of 0. I think lmh6643 and opa1656/opa2156 have the lowest distortion at higher frequencies, 6643 probably even lower. Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. Manufacturer: Texas Instruments. Jul 4, 2009 · The two others are opa2107 and opa627. What else, maybe cleaner more resolved sound at congested parts. Download. I love details clarity, soundstage - listen to rock classical and vocals. Jul 5, 2006 · Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. A true FET input stage is incorporated to provide excellent sound quality and speed for exceptional audio performance. amp. At least it is my preference when associated with an AK-449x DAC. But that does not say anything about the SQ. The OPA1611 and OPA1612 OP Amp Rolling: the Philips CD753 (aka Marantz CD5000) with MUSES8820 vs OPA1692 vs LME49723 and Others - an article by Paul Hunting on TNT-Audio, Internet HiFi magazine, www. Only really better substitution for NJM4580 for example as Pre-Amp can be no less then OPA2228 or even better OPA1612, but for that -3dB less noise (and distortion) over whole audio spectrum you will have to play premium extra. May 3, 2022 · I've seen people use OPA1642/1644 a replacements for the NJM4580s and TL074s on these amps. 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. The amp TI-Produkt OPA1612 ist ein(e) SoundPlus™ Audio-Operationsverstärker mit 1,1nV/√Hz Rauschen, niedrigem THD und Präzision. Follow Us. Buy AkLIAM Original TI BB OPA1612 OPA1611 Classic Op Amp for DAC Headphone Amplifier at Aliexpress for . com +86-755-82524778. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Upgraded OPA1612 op-amp (vs. tnt-audio. See the LM4562 vs LME49720 for All customized electronic components are with high quality and competitive price. I had read it many times before posting this threat. Find more 44, 200333149 and products. post the replies of Buson Audio. But according to re-sellers like audiophonics. 00005% at 1 kHz May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. Mar 22, 2023 · OPA1612到了后，自己先试了试OPA1612+JRC5532，感觉和OPA1642+JRC5532没什么区别，我试了好些碟，也试不出来什么区别；三频几乎没有差别，打分还是一样的，90分水平； OPA1612+OPA1612，这个组合的高频给我非常好的感受，比OPA1642+JRC5532明显更细腻一点，高频的线条感更好 Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Can anybody please suggest some drop in replacements chips? I do little/no audio electronics so don't know what's good in this regard other than matching up the specs. 000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. Mar 7, 2019 · Sometime I use OPA1612, OPA1642 and OPA1622. 000130% Although the price was also cheap, It is a pity that NS was absorbed by TI and was abolished after losing the brand power competition with BB. the differences aren't huge, but big enough to make a change worthwhile. May 15, 2022 · Buggle2 Riaa board. 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 Dec 10, 2015 · A fair question! And although I was the product definer and systems lead for this part, I don't get 100% control over the marketing folks But, I can honestly say that when we started working on this part about a year ago, I was very adamant that I didn't want to create a part with excellent specs but terrible sound quality in the real world. 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. 8 mA per channel. The OPA1611 and OPA1612 The OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low • Ultralow Noise: 1. Mar 20, 2018 · I tried on smsl m3 a few months ago but not on d10. I don't care about listening tests or something else, just want to use the technical better one in my amp. Feb 4, 2014 · Ti and others do have interest to make them at the same level as its primary production line of OPA class IC-s. 000015%) Upgraded special gold faceplate badging and volume wheel trim All features from the Standard DMP-A6 OPA1612 de TI es Amplificador operacional de audio SoundPlus™ con ruido de 1,1nV/√Hz, baja THD y precisión. Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1612 Series Audio Amplifiers. Last edited: 2023-06-06 6:15 am OPA1622 SoundPlus™ High-Fidelity, Bipolar-Input, Audio Operational Amplifier 1 1 Features 1• High-Fidelity Sound Quality • Ultralow Noise: 2. Thanks in Jan 10, 2016 · I talked yesterday to my buddy Greg B. Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. The OPA1652 and OPA1654 op amps offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Goggle bill d mod carver c-1. 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. This is a straight-to-the-point review, so don’t expect a long, detailed review on the sound quality. 5-nV/√ Hz noise density with an ultra-low distortion of 0. 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. I can easily compair them , one with NE5532 and the other with LM 4562. May 23, 2018 · The first time I did test with opa1642 opa2156 (precision opamp version of opa1656) opa1612. 8 nV/√Hz at 1 kHz • Ultralow Total Harmonic Distortion + Noise: –119 dB THD+N (142 mW/Ch into 32 Ω/Ch) • Wide Gain Bandwidth Product: 32 MHz (G = +1000) • High Slew Rate: 10 V/μs Jul 5, 2006 · Thanks for the link. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as Nov 12, 2018 · The OPA1612 is a bipolar IC while it's brother the OPA1642 is a JFET. Jun 19, 2021 · The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. . Find parameters, ordering and quality information Hi there probaly a simple question maybe not. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. 000. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• Jul 5, 2006 · Don't mean to be ungrateful but OPA2107 seems to be an easier option now especially still not sure how others rate the sound quality of OPA1642. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. 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. 1nV/√Hz Noise, Low THD and Precision; OPA1602 - OPA1602, OPA1604 SoundPlus High-Performance, Bipolar-Input Audio Op Amp 然而这一切都是源自于取样时钟基准的高精度和高稳定度性。 传统CD机通常是用一枚石英晶体振荡器配合相应的时基分频处理电路来组成解码需要的时序电路，这样的电路优点是简单稳定，但时序的一致性并不理想，频率的飘移性和精确性不能保证最佳，从而可能导致较大的jitter（时基抖动）失真 The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. TI’s OPA1612 is a SoundPlus™ Audio Operational Amplifier with 1. (NOTE: We once owned a recording studio together back in the late 1970's through the early 1980's. ••• Jun 7, 2016 · Sound Quality Disclaimer: 1. Both fet based opamps sounds a little bit more solid in the bass (not quantity but the imaging and the texture). OPA2134 is basic hi quality Op-Amp and all rounder Op-Amp with great sound. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. 1 nV/√Hz noise density with an ultra-low distortion of 0. I also have been an audio enthusiast for quite a while, having tinkered or created several guitar effects/amps. 00005%), a low input bias current of 2 pA, and low quiescent current of 1. 2. 1-nV/√ Hz noise, low THD+N (0. 1 nV/√Hz at 1 kHz • Ultralow Distortion: 0. Now all the folks are using opa2134 op -amps as the replacement. Parameter-, Bestell- und Qualitätsinformationen finden We would like to show you a description here but the site won’t allow us. It was recently re-capped and all new guts put in . Aug 22, 2009 · I talked to a TI/B-B applications engineer today. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. - Page 2 The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. TI’s OPA1662 is a Dual SoundPlus™ low noise (3. 5-nV/√Hz noise density with an ultra-low distortion of 0. the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption ---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. 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. We would like to show you a description here but the site won’t allow us. Texas Instruments OPA1612 Series Audio Amplifiers are available at Mouser Electronics. com The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Mar 17, 2019 · The OPA1641 would be slightly better. Find parameters, ordering and quality information Mar 17, 2019 · Hi everyone - wanted to take the opportunity on this thread to introduce myself, I am the engineer that is assuming John's old role as Audio systems engineer in the precision op. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. Old op-amps such as the LF412 and TL072 are more than good enough for 99% of audio applications. Is the 2134 the right choice. Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. Language. The OPA1652 and OPA1654 op amps offer rail- Jan 24, 2020 · I know well the opa1612 in the output stage of DAC and while it is good I prefer the sound of AD4898-2 for that application. turpanic@gmail. 5 Euro OP275 ~ 3 Euro OPA1612 ~ 6 Euro According to specs I would think the OPA1642 would be one of the best compromises cost vs performance wise. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. Features include 5. Encuentre parámetros, información sobre pedidos y calidad The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. I tried opa2189 lmh6643(stock), opa2156, opa1656, opa1612 opa1642 opa2140 etc. the OPA1642 in the STD edition) featuring ultra-low noise and low distortion (1KHz 0. I did not get paid for saying something good or bad. 5nV/√ Hz noise density with an ultralow distortion of 0. One good example is XU09 portable headphone amplifier. It offers exceptional performance in almost any audio application. 1nV/√Hz Noise, Low THD and Precision. The OPA1611 and OPA1612 Mar 14, 2010 · Overall balance with new amp is a little darker but with better transients. One S300iu integrated amplifier | Stereophile. Yes, it's a very subjective question, so what I am looking is the highest class of sound -- In my opinion, also as said by Tangent, the openness and the cleaness of OPA627/37 put them into a higher league that OPA2604 and LT1364, both of which are very The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. 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 The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Everything that I wrote here are “IMHO” and as is. Part #: OPA1642. Before any modifications I use shematics to see what i need to choose between these four Op-Amps. This feature, in combination 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 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. It has the most stable input capacitance vs. However, it doesn’t sound like those two chips at all! It’s very musical imo. Mar 17, 2019 · I seem to recall that the OPA1642 is newer than the OPA1612. The OPA1611 and OPA1612 OPA1692 data sheet, product information and support 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 Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. 1-nV/√ Hz noise density with an ultralow distortion of 0. This is based on my experience with the V5i-D. Additionally the OPA1642 sounds fine to me with the PCM1793 chip. however I cannot source an OPA164x at the moment, seems to be some kind of shortage. 00005% at 1 kHz Jul 25, 2016 · Hello all My Marantz and most of my CD players have the LM4562 which I find is great. fr and eversolo-netherlands. 000015% at 1 kHz. Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. 1 nV/√Hz at 1 kHz 1. com In no case did I have too high expectations regarding the sound チョイラボその8 - Choi LABO - FC2 Mar 17, 2019 · It's not always systematic, but in this case: OPA: Op Amp (or grandpa in German ) 16: Audio 5: CMOS Process technology (OPA1652 is CMOS, so I figured I would put my CMOS audio developments here) 6: Next numbers up after the OPA1652/54 family, that leaves OPA1655/56/57 for single/dual/quad of the new device In the case of precision amplifiers OPA1641, OPA1642, OPA1644 Part Number: OPA1642 Other Parts Discussed in Thread: OPA1612, , OPA1652, OPA1688, OPA1662, OPA1602. Feb 28, 2021 · The best sounding op amps for audio work. opa1642 is actually really good. File Size: 764Kbytes. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. 1/f corners: OPA1612 ---- 10 Hz OPA1642 ---- 20 Hz OPA1656 ---- 1 kHz OPA2162 ---- 1 kHz It also looks like the OPA1642 and OPA2162 are not happy driving 600 ohms, but the THD+Noise vs Frequency 3 Description The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. - high levels of DC precision are generally not required by audio customers (audio equipment makers). These three Op-Amps sounds great. OPA1612 sounds better than any transistor preamp I've ever heard and better then my own 6N6P 2 case -no barrels hold- 36kg monster preamp with a 100% double blind test win rate. MUSES8820 is the best, IMHO. Hello, I am looking at replacing the old JRC opamp in my phonostage of my amplifier. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 707dBc=0. So far I don't hear any harsh sibilants (very clean) but it is virtue of my speakers. 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. Jun 5, 2023 · Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. group at Texas Instruments. more specific, the Standard Edition is supposed to have the OPA1642 while the Master Edition the OPA1612. who builds large PA speaker systems. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. com and various reviewers, they have different OP amps (Operational Amplifiers). 1-nV/√Hz noise density with an ultralow distortion of • Ultralow Distortion: 0. Contact us for quotation. You really don't want a tl072 dealing with 20mA into such low impedances. Reports are that both should produce great sound. ah so much other untested opa's 1678 still on my list ina1620. Jul 4, 2009 · Thank you all for your replies. I have a 1988 carver stereo per-amplifier. My favorites at the moment opa1642 and this one opa1656. I got free shipping with Element14 till 29th of this month Mar 9, 2023 · SMSL SU-10 vs M500 MKIII vs DO300 21 vs 9 vs 11 dual op-amps OPA1612 (accoring to the spec from smsl-audio) What is the Op-amps doing in that? M500 SINAD is higher than DO300 with less op-amps. For audio the OPA1642 is probably OPA1612-Q1 SoundPlus High-Performance, Bipolar-Input Apr 25, 2024 · The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. OPA1642 Sound-Plus High-Performance, JFET-Input Audio OpAmps The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified . ) He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. It appears that the The OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low • Ultralow Noise: 1. Unfortunately, I cannot use the full sized V5/6 due to space constraint, so V5i is the only option for me. I have a Technics MASH cd player with the SMDs type of opamps needed. • 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 OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low • Ultralow Noise: 1. The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing current going for Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Part Number: OPA1656 Other Parts Discussed in Thread: OPA2134, OPA2604 The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. 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. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. TI was going to discontinue the LM4562 and others as well. OPA1612 is open sounding but is a little warmer possibly because of the lower midrange roundness. edit: looking closer at the pics, the I/V resistors are 390R (about half the datasheet values, which makes sense as they // the outputs). Perhaps it's a further development. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Page: 21 Pages. The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. 00003% at 1kHz. Tangent didn't mention AD826 and LT1364, which are my best choices. 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. I see now, there have been other instances of noise reported as well. 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. The rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. This combination will sound slightly more clinical than the OPA2228/OPA2822 combination. I no nothing about this. The OPA1611 and OPA1612 offer rail-to-rail output swing to within 600 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. 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. thbclm ppzka hgkgnrb plydd lfns sfvkgdc siubjl kwyinxa czypsfy vrypjapz