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Opa1612 diyaudio review reddit
Opa1612 diyaudio review reddit. Often chosen for headphone amplifiers (built one and loved it) it could also be used with speakers when using a OPA454 as controlling opamp for increased voltage swing. The OPA-Earth was tonally dull and midbass lacking, the OPA-Sun was mechanic in the mids, the OPA-Sun V2 was the best sonically but produced a whopping 375 mV of DC offset where all of the chip opamps produced none. Now i tested opa1612 with lme49720 and 1612 is better in my opinion. com with a TI insider involved. I had been thinking about trying out some of the Burson opamps and saw on these pages that Burson would send opamp samples for an honest review and good to his word Carlos sent me 2 V5i-d opamps to try and review. I also tried my B1K and find I also prefer the BA2018. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. 8 bucks for a genuine part. Feb 11, 2021 · As Mark pointed out OPA1612 is a terrific sounding opamp and if you have problems with its bold mighty extreme low bass performance or with the extreme high resolution and unfiltered highs you can use other new opamps with a more gentle sound like OPA2209, OPA2189 etc. In addition, another possible consideration is with the opamp VCC- connected to ground, then the opamps are running with inputs and outputs offset to within 3 Jun 8, 2023 · THD=-117. The 1642 does not as the offset is too high. The OPA1612 is used by Topping/SMSL and I believe Gustard is using it too and also in the Latest Topping Preamp that everyone is gossiping about…. Resistor values were right according to this schematic. Jan 26, 2024 · Audio amplifier device review: Fosi Audio ZA3 This is the second review I have written relating to a product from the FOSI brand, the first was relating to Mar 17, 2019 · TI's SoundPlus opamp family are astonishingly superb designs. It is using the same chips as the Soncoz SGD1 ) At first sight, the DAC is really really Apr 15, 2023 · The 4 x fake OPA1612 in another identical one sound even better, surprsingly good in fact, but they required that I make tiny heat sinks for them because they run so hot. I've tried replacing it with a number of opamp (OPA2314,LT1057,LT1364,OP275,OPA2604,LME49860). But that does not say anything about the SQ. It has the most stable input capacitance vs. 0 was my music playback (as usual) for the Raspberry Pi 3B+ single board computer. Looking at it its clear that your DAC chip has internal opamps (its voltage-out), these are most likely to be the weakest link in the chain such that they'll limit the improvement you get from upgrading downstream chips. I'm using the OPA1612 dual opamp in a commercial design. What's not to like with that, and all the other SoundPlus family? Craig ••• • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. Swapping might (not "will") cause oscillation as the PCB and decoupling designed for the slow '4558 may not be up to the task with the much faster '1612. Maybe it's too soon for anyone to have obtained and evaluated samples, but -- well -- has anyone yet? Feb 11, 2021 · My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. TL074 is easily surpassed by OPA1644, that's a no-brainer. BTW, last year I crippled my €4. Aug 22, 2009 · I just noticed today on the TI web site that the OPA1611 (single) and OPA1612 are finally reality. It comes with an NE5532. I payed 6. 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. SQ was about the same as other ESS-based dacs in that class. OPA1656 sounded worst, Muses 8920 sounded best. OPA1612 Jun 17, 2015 · I tried my Whammy (with OPA1612) and found it smoother but sacrificed a small amount of detail, so I still prefer the BA2018. Jan 6, 2020 · So, you try different devices and measure. Mar 17, 2019 · The OPA1641 would be slightly better. Sound is more "color", and "massive". I've dropped the 1612 into a preamp and it passes music. 1 nV/√Hz noise density with an ultra-low distortion of 0. Haven't seen this Jun 30, 2021 · I would like to thank Carlos from Burson Audio for making this review possible. With a low price and nevertheless minimum THD. Jul 25, 2016 · The schematic is very helpful thanks. CMRR is not a big issue. Harmonic distortion <0. I'm hoping this community could be of help. 000 (DIY!) tube preamp with tube Jan 11, 2019 · 2. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. May 19, 2017 · 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 really doesn't give much 20 kHz added safe composite loop Dec 31, 2018 · RME ADI-2 FS Version 2 DAC and Headphone Amp Review | Audio Science Review (ASR) Forum opa1612 , opa1622, muses8920 or LM4562? Facebook Twitter Reddit Apr 26, 2018 · Mark Johnson Opamp Evaluation Round 2 Mark Johnson kindly sent me a second set of evaluation opamps which I was very happy to listen to and review immediately upon receipt. 80 EUR for all ten. Please refer to post #4603 The diyAudio First Watt M2x for my evaluation of the first set of opamps. Sep 14, 2021 · The LM4562 is an exception, but otherwise it are the fast op-amps that JRA has trouble with: Misbehaving: OPA1656, gain-bandwidth product 53 MHz LME49990, 110 MHz OPA1612, 40 MHz Behaving well: OPA2604, 20 MHz OPA627, 16 MHz OPA2107, 4. For the case of Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. May 8, 2022 · I am not certain that would be an good idea: The MJM4558 should have a gain-bandwidth of 3MHz whereas the OPA1612 has 40-80 MHz (depending on amplification). He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. Dual AD797 AVCC regulators might be slightly better yet, and can also be used for ES9028PRO. Mar 17, 2019 · For a DAC chip with a low output current, I would suggest op amps with FET type inputs, either JFETs or CMOS. 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. I was surprised by the quality of the Audiophile Lounge internet radio (320 kbps mp3) playing similarly to a live quality flac music source as OPA1612 was replaced by the Burson V6 Vivid. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. Cheers, Greg ••• Jul 5, 2006 · Hi All, Please advise what would be the best bet for a modern replacement of the NJM353 in my 12-15 years old vintage 4X60W Class A Zero Feedback car amplifier? Tried dual OPA627AU on adaptor but the sound is of reduced volume, of loss details and PCB is warmer than before and the noob in me did not realized the input current of 7mA X 2 or 14mA for the each of 4 dual adaptor as compared to Jul 5, 2006 · Thanks for the link. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). I'd like to have a crack at making a decent DAC to level up my elec skills. Heard it all here with different LS and poweramps. He’s optimized the distortion for the OPA1612 into the TPA6120A2 for lowest distortion and that’s not what I’m about. I've seen mention of these on various threads in this and other forums. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. Jul 4, 2021 · The opa1612 are sotamore than good for the job of i/v but we don't know what comes after on the socket Is that a buffer, a filter, ??? Is it a fast oap oscillating on this big socket ? We just don't know ! If a buffer and about your taste needs, You can risk it and putt on this socket an opa2604 if the oap is a double channel Mar 17, 2019 · And I would bet that the amplitude of each step is too small to actually reach the slew rate of the amplifier. ••• Jul 5, 2006 · IIUC the folks at Sparkos designed the board for Allo or they collaborated on it. Dec 10, 2018 · Mark, thank you for reply good to know that you like OPA1612 as I/V for quality 24 bit dacs do you recomend to try It with not just only pcm1794 but also pcm63, pcm1704 what Is your choice for power supply to pcm1794, analogue and digital : Salas shunt, LT3042, ADM7150, cap multiplier what Is your choice for OPA used as diferential summator / low pass buffer - what do you think about OPA2132 Dec 8, 2023 · Welcome to SylphAudio thread! Our New Product Release Roadmap for 2024 **** SE800 PFFB High Power Class-D Amplifier Supply Voltage: dual ± 25V min, ± 85V DC max Unclipped Power (. Jun 5, 2023 · I have used the OPA1612, AD797, LT1115, OPA1642 and OPA1656 in phono/analog preamp stages for a while now and have conducted extensive listening tests, sometimes double blind, sometimes blind, sometimes as just an unannounced "impartial" observer to listening/comparison/"shoot out" sessions. Regarding a review, do you have a decent equipment to evaluate my ADC performance yet? Jul 24, 2017 · OPA1612 has like an 80 MHz GBW and 40 MHz fT while being run at a gain of 3, while NJM4556AD is an 8 MHz part. The high bias currents responsible for the high current noise will cause issues in many circuits with offsets too - pretty much every stage needs ac-coupling with that sort of bias. common mode voltage that I've measured on any op amp. 6) Output XLR balanced, ideally if with a big-good permalloy trafo. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. 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 two 1612s that I have tested have offsets <150uv and the DC servo loop functions in the MC preamp. More options Share Jun 23, 2019 · 5) I/U OPA1612 or similar with 600ohm feedback resistor and some preliminary passive LPF before I/U stage(ES9038Q2M has quite big out-band noise). My workshop is for fun and not to produce a product. 000. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. 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. Low output current would mean the transimpedance gain of the I/V circuit will be high, and the input current noise of the op amp will be a significant contributor. . Opa1656 has good phase response at high frequency. The plan is to build the amplifier stage directly as described by TI in their reference design tidu672c Voltage conversion for the PCM2707 and PCM1794 will be done by two LP5907 Jul 26, 2020 · OPA1692 seems better than OPA2209 Little review here : The Opamp thread | Page 392 | Headphone Reviews and Discussion - Head-Fi. Jan 14, 2019 · I bought 10 OPA1612 from a chinese ebay seller. Oct 29, 2009 · Ah, I wanted to mention that I've also tried a few discrete opamps: OPA-Earth, OPA-Sun and OPA-Sun V2, from Audio-GD. So i expected to get fakes but i wanted to know it for shure. It enabled the use of better components (actual measured performance) that otherwise Jan 30, 2019 · So, first thing I wanted to try is to upgrade the opamp in the LPF. Mar 22, 2022 · The OPA1612 is one of the best I’ve ever encountered, the LME 49720 are hard to beat at any price……. I initially saw both the low input impedance and the signal inversion as potential drawbacks. Jul 5, 2006 · Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. I have a AK4396 DAC (china made) which use a singe dual opamp at output stage. Something like that. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 Apr 8, 2021 · Hi amigos, I share with a quick review of an unknown new DAC. May 15, 2022 · Member. Apr 18, 2020 · It has something for it (buffer, filter) but for I/V I liked the opa1612 a lot for an I/V task looking forward your review about this new one over the 1656a very good one for ears indeed. Jun 25, 2021 · SMPS powered small cl. Jun 5, 2023 · 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. org OPA1656 is a great alternative to OPA1692 as well. Nov 9, 2012 · Total Agree. I'm at the first hurdle, finding accurate footprints/models to May 3, 2022 · Its not immediately clear what would upgrade NJM4580 which is already quite low noise. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. I went through several iterations and settled on JFET buffers to raise the input impedance. Tangent didn't mention AD826 and LT1364, which are my best choices. TI was going to discontinue the LM4562 and others as well. i expected them to put some Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. They are ~6. That little DAC sounds great now, after adding heat sinks and running it through my Furman PL-8C power filter. Generating higher levels of H2 would be fun. Gain stage combined with LPF 50-80kHz, OPA1612 probably composite but not necessary yet. 707dBc=0. I checked all resistor values according to the following OPA1611(single version of OPA1612) schematic and found out that the 8200pF capacitors were actually 220pF(marked on board as 820pF) and the 2700pF were actually 270pF(marked on board as 270pF). Nov 2, 2018 · Many of us experimenting with many different power amplifiers run into the problem of needing a pre-amp for test that can handle all power amplifiers concerning input level and impedance. 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 Nov 21, 2019 · Not great current noise alas, probably unsuitable for MM phono amps as a result, but look decent performers otherwise. That post includes system and program material information and a Nov 17, 2017 · Probably better to use OPA1612 anyway, less sensitive to RF and may sound a little better too. 1nV/root Hz at 1kHz with a 10Hz 1/f corner and will cheerfully drive 600 ohms. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Now even 40 MHz / 3 clearly is not < 3 * 8 MHz, so that won't work out without some local feedback across the 1612 to reduce GBW, usually in the form of a small capacitor. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. 000015% at 1 kHz. Oct 25, 2023 · Been tracing out this new es9039q2m DAC to give it cleaner supply to the relevant parts. Standard opamp for that has pretty much become OPA1612. Mar 9, 2023 · Is the OPA1612 good enough to feed into an external amp? It's in the Fiio K3s but I want to use it as a standalone DAC Aug 3, 2019 · I have successfully assembled and tested them with OPA1642s and OPA1612s. But, for me, I simply don’t care for monolithic OPAs. 3. I do reverse the loudspeaker leads when listening to the B1K to maintain signal chain polarity. Apr 16, 2021 · I wonder if the OPA1612 are like this: Fake OPA1612 from China I have done similar small test batches and examination of some other components such as solid polymer capacitors, polypropylene capacitors and certain difficult to obtain very low noise transistors. Does anybody know how the voltage ist regulated in the following configuration? I can't find where the pins 3 and 5 of the OPA1612 are going to. I don't care about listening tests or something else, just want to use the technical better one in my amp. 15ppm, intermodulation way below that, 1. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. 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. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the photos. 7 EUR at Mouser. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as Jan 6, 2020 · Not long after AX published Michael Steffes composite OPA1612/TPA6120A2 design in March, 2021, I decided to give his circuit a try. (Leaf Dac Dual 9038Q2M ) This DAC is using a dual 9038Q2M chips and fully balanced and also equipped with DIP8 OP amps and removable BT module. 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. 5 metre cable at 33. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. I noticed a low-cost headphone amplifier board based on Mar 17, 2019 · The OPA1641 would be slightly better. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. They certainly control the output voltage. 3 MHz. I must test muses now. Last edited: 2021-03-30 4:29 am Jan 5, 2020 · Of course, I do not go to use "special" $4 LDO from ESS when I can take opa1612 and get less noise. Remember, to actually hit the specified slew rate of an op amp, you have to create a large enough voltage between the op amp inputs to direct 100% of the tail current into the compensation capacitor. At this point noise and ultra low noise supplies might be the last area I should put more effort into for this interface. 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 Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. The higher current drive of the OPA2822 would be beneficial. Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. But I would have to convert the SOP8 socket to DIP8 first with limited space. Feb 22, 2019 · OPA1612 V6 vivid The Moode audio player 6. Feb 11, 2021 · 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 even if the OPA1612 is a really good op-amp. Oct 7, 2020 · Hi :) I've a bit of experience with Altium Designer, C/PP, general MCU stuff, things like I2C and so on. With the current buffer output stage it should simplify design very much. Also, I using CT7601 USB UAC2 because of cheaper and less current draw. It's best use as an alternative to opa1612 when noise is not a big concern. Dec 11, 2018 · My plan is to use a PCM2707C for USB to I2S converstion, a PCM1794A will be used as the DAC and the amplifier stage will contain a pair of OPA1612 and a OPA1622. I opened one SO-8 package and put it under the microscope in our workshop. A amp I very much like this example of a composite. Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. LME49720 sound is boringand too light. Replace the OPA1612 with the rediculously pricey Sparkos SS3602 (690 RMB €80). I had read it many times before posting this threat. It could sound pretty good, but one could get sound just as good from IC opamp designs. Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. This combination will sound slightly more clinical than the OPA2228/OPA2822 combination.
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