Opa1612 vs opa1642 reddit review. OPA1612+BUF634: OPA1612+LMH6643: OPA1642+LMH6643: S/N (H/O) ≥117 dB (A-Weight) >115 dB (A-Weight) >113 dB (A-Weight) THD+N (H/O) ＜0. Switching to the OPA1612 and the OPA1642 doesn't appreciably change the measurements of the MC stage. 2dB) which allows the amp to be driven to full power output with only 1. 8ma quiescent current per channel - half as much as OPA2134,OPA1656 is the best boise performer now, but there many different purposes with different requirements. 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 Switched over to OPA1642 just because of that (that one sounds fine as well). 000015%) Upgraded special gold faceplate badging and volume wheel trim; All features from the Standard DMP-A6; Super-flexible connectivity options with support for direct audio 3rd party apps, popular streaming services, and full appliance There are many reviews of audio hardware and expert members to help answer your questions. OPA828 / OPA2828 vs OPA627. These There are many reviews of audio hardware and expert members to help answer your questions. So, parts are not spec'ed for or There are many reviews of audio hardware and expert members to help answer your questions. 5 ±1 mV dVOS/dT Input offset voltage drift VS = ±2. It is very airy, the bass and treble regions extension pretty well and overall it has a very neutral lively tonality. 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. 00006% at 1 kHz. 860. View more . OPA1612 op amps on DIP 8 adapters - $8 shipped (or buy all of them for $80) I have fourteen of these. Graph is single supply voltage follower. Theme - Light; YYYY-MM-DD / 12-hour clock; The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. Without scoping the outputs or measuring the DAC there's no 6. Your message * Send. For I've decided to change the gain opamp to the venerable OPA1612. Datasheet: 764Kb/21P. of ±2. 08 @ Mouser). These days the likes of OPA1642 / Verified Member 5 Reviews written 🎧 10 years. 4W capable headphone amplifier. 85 mA (VS = ± 5 V) • Temperature range: –40°C to +85°C 2 Applications View community ranking In the Top 1% of largest communities on Reddit. 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. This may cause instability in some second-order filter designs. The amplifier is powered by 2 x 9V batteries for low noise operation. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. Not harsh at all. •Avoid input values below 4 V to prevent degraded VIO that results in an apparent gain greater than 1. Audio, Audio, Audio! Other Parts Discussed in Thread: OPA1678, OPA1611, OPA1602, OPA1642. You can use almost any good op-amp. This packaging style can also be seen in models such as the K9 Pro ESS, K7 BT, and K5 Pro Texas Instruments OPA1612 ระดับ วงจรขยายระบบเสียง มีจำหน่ายที่ Mouser Electronics Mouser ให้บริการสินค้าคงคลัง การประเมินราคา และใบข้อมูลสำหรับ Texas Instruments OPA1612 In 2022 one would suggest OPA1642 and OPA1656 methinks. The OPA2156 is a new, high-performance op-amp from TI. Specifications. The TI THS4061 fet input is very fast, low noise and has a buttload of output current. 8-nV/√ Hz noise density with an ultralow THD+N of –119. Yes, I know everyone likes to think you need GHz op-amps for I/V. Another two OPA1612 with plenty of Like its sibling devices, the X5Max places heavy emphasis on its audio performance, which is why it packs some dedicated audio chips -- Yamaha YSS-205X signal processor, Sabre ES9018K2M DAC, exclusive Sabre ES9601 headphone amplifier and OPA1612 amplifier -- as part of its "Hi-Fi 2. Overall, don't 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. Español $ USD United States. The OPA1641, OPA1642, and OPA1644 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions. The OPA1642 for instance has a diff input voltage max to the supplies. 1 nV/√Hz at 1 kHz There are many reviews of audio hardware and expert members to help answer your questions rather fun, even if the only op I found to be sounding clearly better than ne5532, was the lm4562 ( the others I tried: opa1642 opa2134 and opa1612 ) Last edited: Oct 2, 2021. Hi Andrea, Noted on OPA2107 albeit not all review indicate as such but hope OPA1642 is not from "frying pan to fire". Not to sure whether its still available, you can register with Brown Burr on the Texas Instrument site and provided you are doing R&D not for military purposes, you can order the OPA1612, OPA1642 on SOIC devices free as SAMPLE for R&D and place them on an adaptor that converts from SOIC to dip 8. Now, we run through a hand calculation to find the total noise of a simplified audio system. These devices operate over a very wide supply voltage range of ±2. This gave me a chance to cant really remember ad815, but plenty of experience with opa1612 and opa1632. None. The higher current drive of the OPA2822 would be beneficial. For this example, we are using the OPA1656 in a non-inverting configuration with a gain of 40 dB or 100V/V. It offers exceptional performance in almost any audio application. Packaging & Accessories. Perhaps it's a further development. 5V to ±22V. (for leaded packages at least) can be improved by placing output between +/- VS pins giving smaller loop area for output current I've also seen soic types with common connected feedback pins on both Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email OPA227 has 2 diodes in series , anti-parrallel = 1,2 V pp, maybe PNP like OPA1662 ( has single anti-parrallel diodes) . 2209 has particularly an amazing resolution and detail level with a Great deal of soundstage depth. Contact Mouser (USA) (800) 346-6873 | Feedback. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. 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. Together, these apparently - LMP8672 (probably discontinued) - OPA1612 (which is barely available in SOIC8 at the moment) - ADA4898-2 - OPA1656 (if the circuit around it is right, it performs like opamps which are much more expensive, because of the FET Input stage it doesn't produce so much noise even with higher resistor values on its inputs) - AD8599 ( not a Opa2210 A mon oreille en lpf de pcm1793 smsl l opa2210 sonne mieux que opa1612 opa1642 opa627 opa1656 lm4562 et muses02. Members Online. JoeSVK Member. OPA627BP vs OPA627 . I'd like something between OPA637 and OPA1642. Below is a comparison between OPA1656 and OPA1642. Joined Apr 6, 2018 Messages 11,090 Likes 26,698 Location Alfred, Texas Instruments (TI) introduced the newest addition to the company’s Burr-Brown Audio line, a next generation of the widely adopted OPA1612 audio operational amplifier (op amp). 00005% G = 1, f = 1 kHz, VO = 3 VRMS –126 dB IMD Intermodulation distortion G = 1, VO = 3 VRMS vs Muses02. Ne5532 After this , with two amplifiers both with lm4562 it was time to check if they sounded identical, and they did. 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 We would like to show you a description here but the site won’t allow us. ••• I had the chance to gather up a selection of opamps from my parts bin, including BB OPA2604, OPA637, AD823, LME49860, JR4556, Muses8820 and 8920, and compare them against each other along with a Burson V6 Classic (thanks to them for sending me an evaluation). /√Hz Rauschen OPA1612 — SoundPlus™ Audio-Operationsverstärker mit 1,1nV/√Hz The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. PNG (41. Another jfet good sounding opamp in this application to consider is the AD8620. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. (The TEAC uses an OPA1642 opamp, for 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. 24. 0" package. It is priced at $429. It's best use as an alternative to opa1612 when noise is not a big concern. Package. Highs: Gentle, crisp, dry, airy. Are there the OPA1612 in SMSL D6? Thread starter AudioFans; Start date Jan 14, 2023; A. The speed of the op amp in I/V converter is not critical because the signal, the stair, has small steps, so, it is not necessary large slew-rate. the two first on the base are I/V (I currently use OPA1612 but will try ADA4896), the middle ones are LPF (I use OPA1612), the single one is the line buffer/output. 003% (1 kHz) I’d love to be able to review the AK Junior against it – but unfortunately I don’t have one, and at this stage no interested in buying one just for a The dual version of the OPA1641 is an OPA1642, but I'm confused as I believe that neither the Burson nor the OPA627 are duals. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty Here’s a great article comparing opa2156 CMO vs opa1612. Kota Depok Lisu Instrument (5) Spesial Untukmu. 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. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. 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 Part Number: OPA1642 Other Parts Discussed in Thread: OPA1612, , OPA1652, OPA1688, OPA1662, OPA1602 Hello, I am looking at replacing the old JRC opamp in my phonostage of my amplifier. This OPA provides very good electrical and audio performance. 1 nV/√Hz at 1 kHz The Audiophonics OPA1612 operational amplifier is based on an authentic Texas Instruments 1612 chip. I was wondering if the OPA2604's could be replace with a dual opamp like the OPA1612 with similar or hopefully better results than the OPA627's By newer I meantnewer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. 6 mA of supply current per channel. The single of the OPA1612 is the OPA1611. I see now, there have been other instances of noise reported as well. These devices operate over a very wide supply range of ±2. Technical Expert. N. CUSTOMERS REVIEWS. 85 mA (VS = ± 5 V) • Temperature range: –40°C to +85°C 2 Applications In this article, we review the FiiO’s Flagship All-in-One device, the K9 Pro ESS. Manufacturer: Texas Instruments. the OPA1642 in the STD edition) featuring ultra-low noise and low distortion (1KHz 0. Hi there probaly a simple question maybe not. Please confirm your currency selection: Mouser Electronics - Electronic Components Distributor. • Professional Audio Equipment Both the OPA1611 and OPA1612 are available in 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. All the amplification stages are based on top-quality audio op-amps such as Texas Total Noise of OPA1656 vs OPA1612. OPA1656: High-Performance CMOS Audio Op Amp Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1612 Series Audio Amplifiers. It’s 4 channels not 2 channels which is pretty cool! I’ll wait until more advanced modders sort out it’s kinks and it’s been on the market for awhile! OPA137 — Single, 36-V, 1-MHz operational amplifier with rail-to-rail input to V+ OPA141 Low Power, Precision Operational Amplifier OPA1612 JFET-Input Audio Op Amps OPA1642 — Dual SoundPlus™ high-performance, Even better, try the OPA1612 (if input current isn't a big problem). The OPA1642, SMT-only, is also a good dual BIFET. – Slew rate: 72 V/μs – Gain bandwidth product: 180 MHz • Fully differential architecture: – Balanced input and output converts single-ended input to balanced differential output • Wide supply range: ±2. If soldering surface mount isn't your thing you can order them presoldered from the brown dog adapter 2. Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects. Dear TI E2E support, Hi there, Our team made a prototype of a phono-stage amplifier (pic. I preferred the Sparkos for having the smoothest and most natural treble without loss of detail. Go for the opa1612 given the choice. The OPA1611 • Wide Supply Range: ±2. opa1642 is actually really good. 00005% @ 1 kHz. A comprehensive comparison between OPA1612 and OPA2156 (and other opamps) could be read here: Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. 2 dB at 1 kHz, while driving a 32-Ω load at 100-mW output power. As mentioned previously the OPA2134 in BIFET is a decent performer. Better choices include LME49720, OPA2211, AD8599, OPA1642, AD8512, OPA1612, etc. Every amp. This combination will sound slightly more clinical than the OPA2192 being my favorite CMOS opamp and OPA2209 my favorite bipolar alongside OPA1612. The xlr input and the trigger are two great additional features, as is the nice and efficient enclosure, however the mono is not true mono, and the 13 db of sinad lost is a bit disappointing, especially given The OPA1622, dual, bipolar-input, SoundPlus™ audio operational amplifier achieves a very low, 2. So for a low cost the LM4562 or OPA2134. This throws another wrinkle into the testing as we all know a louder sample is usually perceived as a more detailed sample. The recent swap I did was from opa1656 to opa1612 in the v3. EDIT: an earlier version of this review mentioned that we were changing the I/V op-amp due to misunderstanding of a statement from Topping. It is louder at the same setting compared to any of the IC designs. And the differences to the cheap FiiO were very subtle. 2 - Fully Balanced Class A DAC/Amp with AK4490, OPA1612, Bluetooth, and Battery-Powered Operation DT990 in the grade than the Sennheiser HD800S much lower, this combination from the price difference is a bit big, Shan Ling H2. L'Opa1692 sonne bien aussi. So, it is a different design and chip. 30dB less) There are many reviews of audio hardware and expert members to help answer However they measure and perform worse than SOTA audio ICs like lme49720, opa1612, opa1656 etc. But this time it's a bit more interesting. Also, I am in talks with Burson Audio over this. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. - high levels of DC precision are generally not required by audio customers (audio equipment makers). BTW it is a real pity OPA2828 does not exist in SOIC. The two-circuit power switch its a simple and good solution, but its difficult to find a small two-circuit switch to fit in the 12mm hold in this small case. OPA1612 with ultra-low noise and low distortion 1KHz 0. 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. Over this supply range the LME49860 maintains excellent common-mode rejection, power supply rejection, and low input bias current. Their new Pure Multichannel amplifier is just beautiful! From 7 up to 12 channels of Purifi 1ET400A amps, LT3045/LT3094 regulators, OPA1612 or Sonic Imagery 994 opamps. 8Vrms from a sourcethis is perfect for The YUGE advantage of the Ak4499 vs the others’ is a. 5 V to 36 V) on 3. Given these characteristics, there is a solid use case for my bedtime music sound profile (which can A comprehensive comparison between OPA1612 and OPA2156 (and other opamps) could be read here: https://quantasylum. Hotstock app is where it's at comments. I can see that a lot of hobby builders tend to use the discrete solution, but I can also see that some of the high-end Op-Amps are hitting distortion and noise figures that i would think is hard to beat like the OPA1612 with its 1. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. 1 nV/√Hz at 1 kHz The OPA1641 would be slightly better. the OPA1642 brings it a little closer to Z8 DAC performance, I figure its still a very nice piece of kit for a Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA1642: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 865Kb / 25P [Old version datasheet] High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version In places less hospitable to LME49720, OPA1612 has proven to be a very useful opamp for dac I/V and or differential summing. Additionally the OPA1642 sounds fine to me with the PCM1793 chip. Rp82. OPA Chips – OPA1612 with ultra-low noise and low distortion 1KHz 0. Op amps do differ in their distortion profiles. Reason: Added link 6 The JFET input devices give their best noise performance at medium impedances, in the range 1 kΩ–10 kΩ. OPA137 — Single, 36-V, 1-MHz operational amplifier with rail-to-rail input to V+ OPA141 Low Power, Precision Operational Amplifier OPA1612 JFET-Input Audio Op Amps OPA1642 — Dual SoundPlus™ high-performance, Unpopular opinion- If you are talking about measured performance in the audio band, it probably is OPA1612 or LME49720. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. Furthermore, this OPA features rail-to-rail output switching at OPA1612/2211 has excellent CMRR but PSRR isn't stellar and strictly follows OLG. Engineers apply the knowledge of math & science to design and manufacture maintainable systems used to solve specific problems. Report Item. nishamn27 Member. The slew rate is higher than for the 5532, at 13 V/μs against 9 V/μs. Two identical gain 11 amplifiers were tested. Opa1656 has good phase response at high frequency. All thoughts and experiences with the product are naturally my own. Output Current characteristic curves seem to behave in opposite manners. OPA1612 could certainly be used here, but it may be overkill in this application since noise performance of this circuit is likely to be dominated by the noise from the FET input The next op-amp I am planning to try is the OPA1612 but perhaps the DAC is the limiting factor and perhaps the measurements will look very similar to the OPA2134 He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. Not going into the crazy youtube reviews. OPA1632: Noise level: -118 dBV (A 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 main advantage of using the Stock Hypex buffer (bypassing our gain adjustments) is higher gain (26. That said, a few people consder Slew rate: 24 V/µs; Gain bandwidth product: 53 MHz; Rail-to-rail output; Wide supply range: ±2. --lme49722 lme4562 lm4562 opamp maybe modern production 3886 are all above average? the designs seem to take the 'typical' GBW spec as the effective minimum My guesstimate puts the safe with production variation margin local closed loop gain corner as low as 100kHz for LM3886 with a greater than 4:1 range designing for stable extra loop gain from the nice input op amp Don't tell that to your employer when you show a new design for review. Opa1642 4. i expected There are many reviews of audio hardware and expert members to help answer your questions. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). See the LM4562 vs Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. Vivement conseillé ! (0) (0) * Title. Last edited: 2020-02 This is a review of the Loxjie D40 which is an integrated dual DAC, MQA decoder, and 1. Forums. Description Specifications Customer Reviews (37) You may also like Description. 00005% at 1 kHz. Joined Feb 22, 2022 Messages 32 Likes 4. Last edited: Sep 6, 2023. VOS Input offset voltage VS = ±2. Michael . With the lid off, I couldn't hear any significant difference, but that could be due to the layout and use. There are many reviews of audio hardware and expert members to help answer your questions. Disclaimer: FiiO sent us the K9 Pro ESS for this review, free of charge. It provides a very low noise density of 1. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. 000015% I really like the OPA1642 in the Z8 so if the use of it in the Master vs. The supply The pop appears only when power is turned off. Design & Build. AskEngineers is a forum for questions about the technologies, standards, and processes used to design & build these systems, as well as for questions about the engineering profession and its many disciplines. Low THD and Precision OPA1612-Q1 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. I'll check the OPA2191, thanks for the heads up. The LME49860 has a wide supply range of ±2. Joined Sep 22, The AD opamp is more expensive though than the OPA1612. 1nV/sqrt(Hz) and 0. OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. Normally, that's not newsworthy because higher performing parts are coming out all the time. The new OPA1622 delivers lowest distortion and noise, high linear output current, and low power, enabling the highest performance for professional and 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. com 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. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. Device Information PART NUMBER CHANNEL PACKAGE(1) OPA1655 Single D (SOIC, 8) There are many reviews of audio hardware and expert members to help answer you are whole heartedly welcome to try swapping em. I swapped these for several different op amps including OPA1612, Burson V6 Vivid, and OPA627. I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. I couldn't tell the difference between the Topping and the Marantz's internal DAC. Skip to Main Content (800) 346-6873. After looking at the "CIRMECH" board the OP linked to above, I can now see why the price is so cheap. Both fet based opamps sounds a little bit more solid in the bass(not Dont make me laugh, if you can't hear the difference 5532 vs OPA1612 than you should not be very concerned about SQ (in your case). I think lmh6643 and opa1656/opa2156 have the lowest distortion at higher frequencies, 6643 probably even lower. AudioFans Member. Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. Buy AkLIAM Original TI BB OPA1612 OPA1611 Classic Op Amp for DAC Headphone Amplifier at Aliexpress for . Shanling H2. This is making OPA164x more and more favorable. 000015% at 1kHz. 0 OPA1642 Dual SoundPlus™ JFET Audio Op-Amp O1642A SOIC-8 Texas Instrume di Tokopedia ∙ Promo Pengguna Baru ∙ Cicilan 0% ∙ Kurir Instan. The board self MUTE 5 seconds when the power is turned on to prevent the pop on power-on. 1nV/√Hz @ 1 kHz, with distortion of only 0. The TL072 is a dual opamp. It can easily replace LM4562, NE5532 or TLE2072 OPAs, for example. The Audiophonics OPA1612 operational amplifier is based on an authentic Texas Instrument 1612 chip. Change Location. 5-nV/√ Hz noise density with an ultra-low distortion of 0. if using it alone its the better choice, but if there is a buffer afterwards to drive the headphones, or you are using them for line out, OPA1611, OPA1612 SBOS450C –JULY 2009–REVISED AUGUST 2014 OPA161x SoundPlus™ High-Performance, Bipolar-Input Audio Operational Amplifiers 1 Features 3 Description The OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low The output swing for Aol should be considered as it is different between the two devices. A place for discussion, news, reviews and DIY projects related to portable 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. 25 V to ±18 V or (4. NE5532 is a very good OPA1612 otoh has the best sub bass performance I have heard. Isn't the OPA627 a single channel opamp vs the OPA1612 is dual (so you would need two 627s per OEM opamp replacement)? J. FiiO OPA1612-Q1 Price, OPA1612-Q1 Stock, Buy OPA1612-Q1 from electronic components distributors. OPA1612 SoundPlus™ Audio Operational Amplifier SOIC-8 Texas Instrument. 25 V to ±18 V ±0. 1-nV/√Hz and an extremely low distortion level of 0. FiiO uses the Texas Instruments OPA1612 for I/V stag, OPA1642 as LPF, and customized OPA926 for voltage amplification, similar to the configuration on the original M11 player. 1M subscribers in the headphones community. 5nV/√ Hz noise density with an ultralow distortion of 0. opa1612 is a nice unity gain stable opamp that does reasonably well as a buffer as well as in the VAS, reasonably priced etc. It sounds different from the Drop Signature version (I have no idea how the V2 Signature sounds like), in that it's less laid-back, less outright warm, but yet maintains a palatable mid-to-high Yes xrk971 it's a well know fact that the TPA6120 is and has been a very nice sounding CURRENT FEEDBACK op-amp as I noted above in my post. I just noticed something interesting: According to docs submitted to the FCC, the only internal difference between the Standard and Master Edition is the Dual Femto Clocks PCB board. OPA1611, OPA1612 SBOS450C –JULY 2009–REVISED AUGUST 2014 OPA161x SoundPlus™ High-Performance, Bipolar-Input Audio Operational Amplifiers 1 Features 3 Description The OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low I talked to a TI/B-B applications engineer today. They require a SOIC-8 to DIP-8 adapter though. AD8512's do sound better but they are 8 nv noise vs 5 nv noise for the BB OPA1642. 1mV) give the amplifier excellent operational amplifier DC performance. This device also has a high output drive capability of ±30 mA. AUDIOPHONICS OPA1612 Dual OPA DIP8 (Unit) - reviews - There is 1 review. The Best Sounding DUAL opamps. Frankly, this product has some points in favor but some against it. But according to re-sellers like audiophonics. Facebook Twitter Reddit Pinterest Tumblr WhatsApp 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. 00 : Crosstalk - 110dB PSRR - 80dB min, typ 100dB Distortion - 0. Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. From my humble experience the output stage opamp of the DAC can make a noticeable sound difference Fab . com/blogs/news/opa2156-hifi-in-cmos. Some of this review will, therefore, be similar to the K9. 25 V to ±18 V. Facebook Reddit Pinterest Tumblr We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 1 MB · Views: 136 test_OPA1642 vs OPA2134. Even AD797 or OP627 cant The lowest noise opamp serves no purpose, if you have a MOhm feedback network. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. fr and eversolo-netherlands. 2. 000015% VS OPA1642 on the standard DMP-A6 Thanks Amir, I was just wondering why the review was taking so long. Log in OPA1642). Find out all about its performance, now on Headfonia! T-Shirt Shop US; similar to the K9 Pro ESS, and includes OPA1612 and OPA1602 op-amps. 4 Calculating Voltage Noise at the Output. stock F1 was very, very similar to my TEAC HA-250, which is a decent but outdated portable DAC/amp. 2 X OPA1642. Yes. 000015% VS OPA1642 on the standard DMP-A6 OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. 001% (1 kHz) ＜0. There is only 2 large capacitors in the power supply 1 x 1000uf 16, and 1 x 2200uf 16v, and 4 x 100uf capacitors of various values and about 4 x 47uf 6. The picture shows my op-amp rolling, I have tried the ne5532, opa1612, lm4562 and opa1642. Check These devices operate over a very wide supply voltage range of ±2. It was recently re-capped and all new guts put in . 1-nV/√ Hz noise density with an ultralow distortion of 0. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). 25 V to ±18 V 0. The 23 votes, 24 comments. 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 As for the OPA1612 themselves, those are regarded as warm, smooth and natural sounding, exactly what a super-linear silicon like ES9038 PRO really needs. RPi The speed of the op amp in I/V converter is not critical because the signal, the stair, has small steps, so, it is not necessary large slew-rate. 63 kB, 1236x599 - viewed 542 times. The OPA1642, however, is also LESS expensive ($2. Disclaimer: This was sent to us as a sample The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Of course there are a number of other factors to consider, like the ability to drive the input impedance of the following circuitry Searching for info on these on Google only really brings up a few reviews that are worth reading. 2V inside the negative rail and 2. Opa1612 ( sounded almost as good as lm4562, very small difference ) 3. 1) base on the circuit in OPA1642's datasheet. Last edited: 2020-10-05 9:04 pm More options Lets take a look at the NE5532 op-amp, used in audio products everywhere since 1979 and it costs about a $1. 9 mA per channel; The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. And bias current vs common-mode voltage has a slope that adds distortion (H2) when source impedance isn't super low OPA1642 Datasheet. The Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. 1 nV/√Hz at 1 kHz The LPF and OP amp used are also different (OPA1622 and OPA 2140 vs OPA1612+LMH6643 and OPA1642). - Buckeye buffer stage (OPA1612 OP Amp), allowing for Low/Med/High gain settings via toggle switch on the rear. 18 The LME49860's outstanding CMRR (120dB), PSRR (120dB), and V OS (0. The Lounge. I no nothing about this. Post #4,997 of 7,388 imran27 100+ Head-Fier. We are also using filtering as described in Section 1 to limit the BW. Consider joining r/PlayStation for your daily dose of memes, screenshots, and other casual discussion. OPA1656 (CMOS) on an adapter is a winner too. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. 99. common mode voltage that I've measured on any op amp. However default 2134 is already pretty good and well-balanced - well-defined bass, good forwarded mids and non-fatigue highs. 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 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). 8dB vs. 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 In this review we take a look at the new $499 USD FiiO K9 DAC & AMP with Bluetooth. LME49724: Noise level: -117 dBV (A-weighted), THD+N ratio: at least -109 dB (1 kHz, 2 Vrms), around measurement instrument limits. This OPA1642 with JFET input achieves a low noise level of 5. The op-amps I had on hand were: OPA-2134 (shipped in the Topping D10) Muse 8820; Muse 8920; LME49720; OPA-1612a (SMD part mounted to through-hole socket) This OPA1642 OPA is mounted on a DIP8 socket, enabling it to be easily connected to a circuit accepting this format. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. Et comparé le tout a un smsl c100 c'est comme si le c100 gommait les aspérités de la musique. In terms of measurements, the specs (refer the table I made above) are so close as to be indistinguishable (distortion, crosstalk, SNR etc), but the older X3ii's specs are slightly superior. The v5i semi-discrete op-amp in the walnut did have one immediately noteworthy difference. If changing the opamp to this one doesn't make a difference, nothing will. OPA1612 is one the most low-noise opamps ever built, so totally recommended for unity-gain stages (LPF or output stage of a DAC, but also I/V stage too). Single package only, 6 nv noise , 80 v/us slew rate and gobs of open The gain and phase vs frequency plot shows that the phase is almost flat for up to 1 MHz compared to OPA1612 which is inversely proportional to frequency up to 1 kHz and then constant up to 1 MHz. i tryed lme49722 opa2134 and opa1612 ,--. 5 V to 36 V; Quiescent current: 3. Not a single store in Tokyo that specialises in Hi Dotneck, thanks for explaining. Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. It has to do with the load capacity limitation be under a certain load Today, we review the FiiO M11S which is an Android 10 DAP featuring a dual Sabre DAC, a snapdragon 660 CPU, and 670mW of output power. post the replies of Buson Audio No brainer there, JFET and CMOS types. Great for guitar fuzz boxes. The OPA1662 and OPA1664 series of op amps offer rail-to-rail output swing to within 600 mV with 2-kΩ load, which increases headroom and maximizes dynamic range. pdf ••• Hi all, Tried few OPAMPs myself in I/V, LPF, VAS and BUFFER stages with my Essence One DAC/headamp, like: NE5532, LM4562, NJR2114, OPA1602, LME49720, MUSES8820, MUSES8920, OPA2604, OPA1642, OPA2132PA, AD8672, AD8599, MUSES01, MUSES02. It costs $849 USD from FiiO, directly. The main difference between the K9 and the K9 AKM is the sound. ) check out and compare measurements of test reviews from various models in stereophile The next op-amp I am planning to try is the OPA1612 but perhaps the DAC is the limiting 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. com and various reviewers, they have different OP amps (Operational The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Find more 44, 200333149 and products. OPA1642 sucks 1. I've read about the 'Sondigo vs. You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc OPA1612-Q1: 1Mb / 31P [Old version datasheet] SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier Burr-Brown (TI) OPA134_071: 403Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS OPA134: 432Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS More results. Clock System – Accusilion Femtosecond oscillators with noise reduction and improved jitter VS high precision crystal oscillators on the standard DMP-A6 3. (probably is). It has the most stable input capacitance vs. 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. 5 V to ±15 V • Shutdown current: 0. You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc Of the op amps in my collection the massive misbehavers are the OPA1656, the LME49990 and the OPA1612. 4 mA per opamp section, which is significantly less than the 5532. e. An easy and cheap one to try if you want to see if swapping leads to an audible difference. The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. Unfortunately, I cannot use the full sized V5/6 due to space constraint, so V5i is the only option for me. If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Just did an A/B with 2 opamp buffers on my Hypex NC500 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 Definitely an improvement. My phono preamp, bye the way, uses OPA1611/1612 and OPA1641/1642s- amongst others. post the replies of Buson Audio There are many reviews of audio hardware and expert members to help answer your questions. Low THD and Precision OPA1612-Q1 There are many reviews of audio hardware and expert members to help answer your questions. Just check the rails aren't over +/-18V. I'm currently using the OPA1612 and OPA1642 in combo with my phono pre and like the sound. 25 V to ±18 V, on only 3. 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. 3 5 µV/V INPUT BIAS CURRENT IB Input bias current VCM = 0 V(3) ±10 ±20 pA IOS Input offset current VCM = 0 V ±10 ±20 There are some things to watch out for when swapping op amps. Those are fine. The FiiO K9 AKM is presented in the distinctive packaging style that FiiO has been using since 2021. 3V inside of each supply. 3 v caps, Service manaul Mega File Upload - hfe_technics_sl-pg440a_service. Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. TL072 fig 28. Audio, Audio, ขออนุญาตถามต่อนะครับ sound blaster zxr อัพยังไงดีครับ Single Op-Amps (Differential to Single-Ended Converter) LME49710 Dual Op-Amps (I/V Converter) JRC 2114D ควรอัพเป็นตัวไหนถึงเหมาะครับ ตอนนี้อยากเริ่มเบาๆก่อน ดูไว้ I have an Onix XCD-99 which is basically a Music Hall CD-25. 6 KB · Views: 130 Last edited: Dec 19, 2023. Both (I believe These are probably among the two highest of the best sounding dual opamps around today. I use the AD8066 as an alternative if/when I get bored of the 1612 quite a lot as it has a darker background and decent low end but it isn't Upgraded OPA1612 op-amp (vs. Extensive listening test showed me that the best sounding result was with the lm4562. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. ) Logged HB9EVI. 3 2 µV/°C PSRR Power-supply rejection ratio VS = ±2. You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a I seem to recall that the OPA1642 is newer than the OPA1612. They probably used the stock resistors values too, which are too low for the tl072 to work comfortably. 000015% THD or the OPA1642 if JFET is the way to go. Following performance figures have been measured in Addon BalOut module: Both opamps are so good that it is difficult to measure differences directly. Joined Sep 10, 2023 Messages 62 Likes 56 Location Facebook Reddit Pinterest Tumblr We would like to show you a description here but the site won’t allow us. To 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. Is there going to be a sonic difference running dual mono when listening to stereo sources? Is dual mono a "purer sound" aka less crosstalk? Going to be running OPA627BP on LittleDot 1+ using Senny Momentum 2. 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. The Forums. My own conclusions with MUSES: In I/V stage: - MUSES8920 is Here’s a great article comparing opa2156 CMO vs opa1612. Joined Facebook Reddit Pinterest Tumblr WhatsApp 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. It's a VERY good bipolar junction opamp with incredible specs. 1. It’s runs on current not voltage which is interesting and not traditional b. So you do mean to say there is absolutely no difference between opa1656 and opa1612 in actual listening terms ? D. Hign-concerned Chemical. But more importantly, it's CMOS. Still, the ADA4627-1 kills them all for sonics, nothing is close. 5V inside of the positive rail . This device operates over a very wide supply range of ±2. Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. . The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). This here is the V2 version of the Zen DAC. Djano Member. OPA1612A OPA1612AID OPA1612 OPA1611 OPA1612AQDRQ1 OPA1662 OPA1632D OPA1662AID OPA1602AID OPA1611AID OPA1652 OPA1642 OPA1632 OPA1612AIDR OPA1641 OPA1602DR OPA1632DG4 OPA1642AID OPA1652AID We would like to show you a description here but the site won’t allow us. Part #: OPA1642. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. Vendor's Bazaar. Member Areas. The single package OPA827 is also good. Reply reply The Reddit home for PlayStation 5 - your hub PS5 news and discussion. Last edited by mediatechnology; 30th November 2017 at 11:52 PM. tnt-audio. Facebook Reddit Pinterest Tumblr WhatsApp Email All This Thread Reviews Gear Database Gear for sale Latest Trending. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. In this article, we review the FiiO’s Flagship All-in-One device, the K9 Pro ESS. 000015% at 1 kHz. 2 with DT990 really wrong, DT990 performance has been improved, but H2. Le burr brown + opa2210 est bien plus musical plus detaille meilleur rythme plus naturels les The LPF and OP amp used are also different (OPA1622 and OPA 2140 vs OPA1612+LMH6643 and OPA1642). After working with some OPA1612 on my recent Topping PA5 D01 Module replacement project (at ASR), a friend sent me a few OPA1612 opamps he ordered when they were in stock since i couldnt get them anywhere. and better suited to non-inverting buffer duties than the OPA1612/2211 . It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. but worse CMRR. jpg . Share Sep 27, 2015 at 4:42 AM. Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. Only registered users can post a review. Audio, Audio, Audio! Compared to OPA1612 however it's a toss. Hi team, The following two sets of Output Voltage vs. 25 V to ±18 V TA = –40°C to +125°C(2) 0. I have a 1988 carver stereo per-amplifier. Member There are many reviews of audio hardware and expert members to help answer your (stock), opa2156, opa1656, opa1612 opa1642 opa2140 etc. The X3iii has lower peak to peak voltage (single OPA1642-Q1: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642AID: 764Kb / 21P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS More results. For example the OPA1678 has a much higher gain-bandwidth product than TL072 and different output impedance, which means that the criteria for it being stable (i. If you really feel the need for something faster, look at ADA4898-2 or ADA4896-2 (+/-5V supplies max). 1 nV/√Hz at 1 kHz The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Similar Description - OPA1642: Manufacturer: Part # Datasheet: Description: Texas Instruments Thank you all for your replies. I know one is mono and other is stereo. It appears that the OPA1611/2 have a lower noise Technically speaking, it's really hard to beat opamps like AD797, AD8599, OPA1612, OPA1656, so it might be safer to use one of these over the "exotic" ones, There's no shortage of candidates here, and the new OPA1656 is a great option, but you could also check out: OPA1642, OPA1678, OPA827, and the newer Stage width is reduced compared to stock OPA1612. Personally I still like to work with the TL07x if I need a FET input, or otherwise 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 only If I have to modify something that comes with very old OPAmps. 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 - LMP8672 (probably discontinued) - OPA1612 (which is barely available in SOIC8 at the moment) - ADA4898-2 - OPA1656 (if the circuit around it is right, it performs like opamps which are much more expensive, because of the FET Input stage it doesn't produce so much noise even with higher resistor values on its inputs) - AD8599 ( not a I bought the VTV buffers with Sparkos SS3602 op amps. Parts. This op amps offer rail-to-rail output swing to within 200 mV of the power supplies 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. Joined Nov 21, 2022 Messages 19 Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. Goggle bill d mod carver c-1. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. It has a modest power consumption at typically 1. I only covered the customs fees & taxes. Additionally, the K9 isolates its audio and power stages to minimize noise along the signal path. Jim Williams Audio Upgrades Facebook X Reddit LinkedIn Post Reply Welcome to the Gearspace Pro Audio Community! The OPA1622 is a slow device compared to the OPA1612/OPA1656. I only covered the customs fees The OPA1641 would be slightly better. 2 did not play The OPA1641 would be slightly better. it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you Part Number: OPA1642 Other Parts Discussed in Thread: TLE2426, , OPA1656, JFE150, JFE2140, OPA1612, LME49720, OPA891. May 2, 2022 #186 wallaceho said: Hi guys, I OPA1612 is decent the only reason I'd use anything else really is that the 1612 tends to be a tiny bit cold/bright and sometimes a touch synthetic otherwise it produces very high quality and quite pleasing results. 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. Model Number. jpg. Gallery Archive Articles. 00003% at 1kHz. SIY Grand Contributor. It made a difference in sound and I'm not gonna deny that. Home. It is actually a complementary. Two cases were evalutated – in a The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. I tested them at 6kHz and compared with known genuine NE5532, LM4562, JRC4580, TL072. Compared to that review the 60Hz hum is much reduced (c. X-fi Prelude' comparison a few threads down and I basically concluded from that the AD8620 might be considered better than the default LM4562. The OPA1622 offers extremely-high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 It was a deliberate experiment and I was expecting fakes. Aol for the OPA2134 with a 600 ohm load has an output swing that is 2. We would like to show you a description here but the site won’t allow us. Not much to say other than these are low noise and distortion and easy to use in DIP 8 sockets. These devices also have a high output drive capability of ±30 mA. 25 V to ±18 V or 4. English. Thank you all for your replies. Their distortion is not specified in the audio band. The OPA1662 (dual) and OPA1664 (quad) series of bipolar-input operational amplifiers achieve a low 3. diyAudio Community diyAudio Store. 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 The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. The original amp has the OPA1656 and the other has the OPA1642. The temperature range is specified from –40°C to +125°C. 25 V to ±18 V The dual version features completely independent • Single and Dual Versions Available circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven 2 Applications or overloaded. It is now corrected above. 9 mA of supply current to accommodate the power-supply constraints of many types of audio products. Very nice presentation in the link! later Audient has the best quality/price ratio with similar products and technologies. 3 nV/√ Hz noise density with an ultralow distortion of 0. It's well known that all the rest being about equal, bipolar opamps will sound better (and distort less) than FET input's. Long-winded question for anybody is what’s the diff between these two groups of op amps that While I heard and reviewed the Drop Signature variant here, I had never had a chance to hear the plain Zen DAC. Now all the folks are using opa2134 op -amps as the replacement. 699. 004% @20KHz The above parameters are insignificant to the audio level variations imposed by substandard audio recordings, room modes and compromised A while ago I compared a FiiO D03K (€20 DAC) vs a Topping E30 II (150€) vs the internal DAC on a Marantz CD-Player. Had ordered from Farnell to try since it is not too expensive. Figure 4-1 There are many reviews of audio hardware and expert members to help answer your questions. 6 Electrical Characteristics: VS = ±15 V at TA = 25°C, RL = 2 kΩ, and VCM = VOUT = midsupply, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AUDIO PERFORMANCE THD + N Total harmonic distortion + noise 0. consists of 2 x 10 op-amps in parallel and the two The first time I did test with opa1642 opa2156(precision opamp version of opa1656) opa1612. 8 bucks for a genuine part. egzk lngit bzlhvkeb adx mqk tfkt pmj pthg hluiuppa ntwrz