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Best op amp diyaudio You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc Hello, guys. I've been doing a lot of searching around and there's much disagreement on OPA1656 Yes, some times noise add a little bit of spark to the sound making it more beautiful to our ears, i have tested power Amplifiers with THD+N at 0. pdul. I need to sell the MF amp. you can utilize the dc offset trim pins 1 and 8 and have it direct coupled, no output cap, wouldn't that be lovely. i will second the notion of the opa1612 being audibly superior to the ne5532 its a huge difference my daughter who patiently sat through almost 2 hours o bling listening tests on 3 upgraded cd players a nad 546bee with foil film coupling caps and 50 volt 100uf muse bipolar and wima fkp3 . Discrete circuits Feb 28, 2021 · OPA 1642 are the best for audio, nothing comes close, if you’re getting into LM or LME get in there fast from trusted suppliers as they are being wiped out of existence and Jan 25, 2020 · Be aware that the best op-amp for a phono-stage, for example, is not necessarily the best op-amp for a DAC I/V stage. 4558 is quite good (there´s a reason it´s a classic), specially because, contrary to all Op Amps of that era, this was the first one optimized for Audio, go figure. It was 50 years ago, but it is not now. Best should be an op amp which i can adjust the dc offset even if there's Dc Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Interesting! Thanks for the explanation. Ed . Cheers George . diyAudio Community diyAudio Store. Remember to isolate the op amp positive power supply lead with a local R/C network. This is why I like a high quality tube component and/or zero feedback solid state component in my system, that adds a bit of second harmonic distortion in there I mean it is really about the spectrum and how pleasant or inaudible it is to Yes the LM4562 dual is excellent for audio use. I. The biggest disadvantage of all these considerations is that all exist distortions (THD+N) are lumped together in the diagrams and no distinction is made between THD components e. I'd also like to know if it is a good idea to make an input buffer, I mean put a low current noise op amp at the input and then use a passive RIAA ecualization and then add another op amp: input buffer - passive RIAA rc network - gain (maybe with hi pass filter for rumble). In the moment there was the same issue by an other user and I want to reduce additional parts in the signal pad - go to post #28 under At least when I’ve done searches on “best op amp for audio” the OPA627/637 are on or near top shelf in the opinion of those DIYers who listen to many. In my experience the way to get the best performance (subjectively) from any opamp is to give it the lightest possible load to drive. KSTR. peak power assuming 100% effiency. R. The on board sound comes with a OPA2134 op amp that's easily removable to swap out. I had to put . IC802 sees more hf hash from clock feedthru if the DAC does have The LM4562 A07 does work really well if you feed it with a good preamp like the Aiyima T6 Pro which also is flexible when it comes to op amps. That does not change the situation. The OP sees the impedance of the MC-cartridge (transformed up by the audio tranny) parallel to the 47kOhms input impedance. Gallery Archive Articles. I last tried the circuit with OPA2134 in year 2000, and with TL074 in 1992. 2uF film cap. It is important to use bypass caps appropriate for the op amp you are using, not the signals you are putting in. One resistor (not too critical; 4. Joined 2011. Even after TL072 appeared, I kept using 4558 for transformerless input balanced mic preamps, because if driven from a low OPA627 is one of the best, much better compared to OPA604, 602 and 134. I don't have a subwoofer right now. Remove the capacitor and the op-amp should work. Theoretically, the broadband current noise spectral density of an op amp should be In=sqrt(2*q*Ib) where Ib is the input bias current, and q is the charge of an Lots of op amps in audio use these days have GBW of 100 MHz or higher. Can the best discrete op-amps compete with a fully discrete "classic" design for Single-Ended in-out ? Osvaldo de Banfield. Paralleling op-amps is really only good for lowering noise, and driving heavier loads. Idea taken from Dicks site. Some of the best sounding op-amps are only available as singles. Search titles only Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Most DIP or SOIC adapters can easily be purchased from eBay. K. the Vswing is within many monolithic op amp's capabilities, some can also provide the current without strain . I used it all over the place in my THD analyzer. What is the best recommended op-amp for the filters on the AK4396 DAC? NJM2068 is installed and I have some OPA2134 and OPA1612 available. Best opamp for my CD player Enzo I don't know about the best opamp for your player,for reasons mentioned in the previous reply by Crippled chicken. Note that negative feedback is taken around the entire loop, including the output transistors and the 1uF caps shorting the output to ground. Even the relatively humble TL072 can sound very good when its fed the cleanest, lowest impedance power. First thing is to remove the original Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I know to many people, who has been upgrading their gear with new op-amps, and been happy about Just until they tried to put back the NE5532 in 😀 Every amp. Op-amps and comparators are basically the same. I know quite a few op-amps 😉 Have been working in audio R&D some years! I know that op-amps sounds different. Because music isn’t just a single frequency or a sum of two or three, but a highly complex mixture of not only different frequencies but also different wave forms, the best agreement between the measurement results and the results for perceived sonic quality in listening tests can be achieved by choosing the height of the measurement frequencies for IM op amps are a nightmare to find the right one. Your choice of op-amp or comparator is from what your need is. I am planing to build a dac with no op-amp. Then some people compared it with other discrete op-amp (discrete elliot and Exotique M1 SE) and they prefer my op-amp. 2023-01-19 8:24 pm #4 2023-01-19 8:24 pm #4 I think my best option is to start again and space things out a little. Last edited: 2020-01-30 Everything on the power rails is attenuated by over 100 dB in modern opamps, anything you inject into ground might get amplified by 100 dB. I found THS4631(fet op-amp) better for its very low current noise while its voltage noise is only 2nv which is again better than many op-amps outhere. The AD797 is a very good op amp compared to the many op amps out there and would include it in with the 30 or so which are acceptable for audio. Using feedback will cause the input to be overdriven, by small amounts of HF-noise. so a very quite and low distortion single op amp stage seems in order. The goal was to find the Op Amp that will (apropriately implemented) have: - best sound possible - the least DC offset possible (to avoid I mentioned them since many FET op-amps have higher voltage noise and also distortion. For very good op-amps the DAC, ADC and power supplies seem to be greater limiting factors than the op-amp I am trying to evaluate. With the slow slew rate op-amp the virtual ground the DAC is feeding stops being at ground until the op-amp slews its output voltage to draw the current thru the feedback resistor to get the virtual ground back to zero volts. The input is essentially shorted with 10mohm resistor in order to have a -140db control signal. hi it is a very simple op-amp circuit very much standard, except for 1. Source to buy the op amp I am going to put a socket in so I can try different IC's with ease. And the subject is also not if 5532 is the world’s best op-amp. Thanks. You will get some bad advice from both extremes, because people do imagine "The essential requirement is that the positive and negative rails should be decoupled with a 100 nF capacitor between them, at a distance of not more than a few millimeters from the op-amp; normally one such capacitor is fitted per package as close to it as possible. My questions: 1. TL071ID at just over 30pence each or less than 1/2 Euro has excellent characteristics and a slew rate of 13v/uS amd band width of 3Mhz. 2017-04-25 6:01 pm #3 2017-04 Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY LT1028 and AD797 are some of the best op-amps on the market, but this circuit is clearly intended for moving magnets. Once that amp is out of the way, you don't really have a need for op amps with input noise below 5 nV/rtHz. AKlein. I didn't try it though AD8397 is great, just be sure to put 2-3 Ohm output resitor, wirewound 5W should keep the op-amp safe from shorting output to the ground. You'd have to check the datasheet for the NJM to confirm it's driving ability. 2013-09-22 12:48 am #9 It seems to have no problem at all driving them. As Barrie Gilbert (one of the top analog designers of all time) explains, an op-amp is However, they are all bipolar input op amps so they have a much higher current noise than, for instance, JFET input op amps. Since the transformed cartridge impedance is considerably smallwer than 47kOhms, the OP is looking into a rather low source impedance. If not what should I use? Search Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Don't use FET op amps for audio! --> Non linearity! 2. i'm working on an amp that basically uses a discrete op amp for the input stage and VAS. You just don't run out and randomly grab a few passive @Thx1326 You are starting to straddle the line here between the half of the population who may not be on the more sensitive side of the Threshold of Audibility bell curve, and other half who notice more about sound. TI and others can throw so many new developments on the market. 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 Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I never tried this op amp. I'll like to try 1. car-amp and this are using the "old" HA4741 op-amp in the input/ filter stage. 2. 15X, followed by the inverting RIAA stage. The combination of signal levels, source impedances, RIAA EQ curve, etc. But I am not completely certain it is the best pick, and I am also having trouble finding it in a DIP package. The MC33178 actually gave better noise performance when corrected to a high impedance source (like a magnetic pickup) than other parts that on paper had lower noise specs. In another thread some popular op-amps were simulated in both inverting and non-inverting amplifier topology and the results showed, that all the op-amps showed less distortion in the inverting topology. current mirror 'on top' 3. Current amp is the Douk U3 Mini(waiting for parts to build the sapphire4). tl071 is a single op-amp that means you can try the standard ne5534 to ad825. I suggest 0. Both amps were originally 5534s, and the design used 100uF electrolytics after each stage because of the large offsets. Like so many things in audio, no resolution is expected in the near Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I tested a few in both units and the best combination to my ears at least is the opa2604 in the output stage of the T6 Pro and the LM4562 in the A07. P. (F2-F1) and (F1+F2) IM products are made by the same non-linearity as 2nd harmonics. I design low frequency usb scopes and need about 1mhz bandwidth and high input impedance and RRIO. The aim of the efforts is to find out class B solid state variants with the same character of distortion than class-A and tube amps. If you have this in place, it can save an amp from self destruct if an unstable load is plugged into it. AndrewT. It is far better than opa2134/2132/2604/2228 (BB-veild sounding op-amps), ad826, op275. 022uf I would not equal best sound with lowest THD. When it comes to noise, the NE5534 is still the best. of a low order (inaudible up to around 1-2%) and those of a very high order, which always occur even with extremely low THD+N levels are still audible - Certainly it is not the purpose to absorb on-going oscillations. Vendors Audio Poutine Holton Precision Audio Elekit XRK Audio More Vendors More. I used the schematic on Amp Chips DIY forum. The NE5532 and 5534 are not acceptable for audio. They could be '0' or '1'. 1. Keep the LM318. I want to get rid of sound of that digital sound of the ipod and correct some brightest with the amp. Source & Line Analogue Source Analog Line Level Digital Thanks! I noted down the precise language for future. I have diyinhk es9038pro board and try muses8920 for i/v and LPF. 1 ceramic bypass caps on the power supplies within 2" of the socket, and a 22 pf cap around the feedback resistor, to eliminate the resulting oscillation. Search titles only By: Search Advanced search Search titles only By: Search Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. All the parts are on the way. Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi didn''t like the OPA627 sound in this dac. OPA132/OPA2132) for 10dB or so of gain and the second stage using a high-rail-voltage op-amp like the LTC6090 for the remainder of the gain, and for its ability to work with high rail voltages (Vrail,max=140V!). 1 uF. Output transistor matching, in fact, try some of the newer outputs. I have a radioshack $20 amp. I think OPA134 series will drive headphones OK directly. Performance-wise it was unbeatable and is still very good. A possible reason for this is that bipolar designs generate greater odd-order harmonics than FETs. You should understand the circuit in order to choose the best fit for the job. In this configuration, the entire Looking at it, the circuit looks straight forward, with one dual op amp. Joined 2003. The 5534 doesn't sound the best choice on a few levels really for something like this. I would like to build a system for an ipod. 2020-03-07 12:40 am #46 2020-03-07 12:40 am #46 sandrohv said: Guys, if you for mm cartridges some of the lower noise jfet op amps can be used at line levels op amp noise isn't an issue, many applications can use op amp based circuits with measurable errors held to below the noise floor many will still be using strawman examples from the 1st few generations of op amps from the 70's to "prove" the superiority descrete Following on from the work described in a previous thread, I have managed to accomplish my goal of approaching the performance of decent IC op-amps with a simple discrete circuit that can be impemented small enough to replace an IC. The problem is that no one input circuit can cover the whole rail-to-rail range. sample Op Amps from local AD, LT and TI dealer. For example, using a notch filter the stock humble NE5532 looks far better than when initially evaluated without a notch filter. Version 1 of mine used 17mA current total Best solution for this is of course use a DUAL JFET. on hand I have opa2604, opa2134, AD826, LM6172, OPA2132pa although, the AD826, and the LM6172 may be too fast, and also True! However, a CCIF twin-tone IMD test uses summed 19 kHz and 20 kHz tones, and we look for the F2-F1 difference at 1 kHz. Joined 2007. Any recommendations about what should be the best op amp to Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. It is based on PCM1794 + CDTA (Current differencing transconductance amplifier)-I/V + JFET-buffer. Other op amps, I regularly use are opa2107. require the careful tradeoff of conflicting requirements. Having the opportunity, I did a lot of testing and experimenting with these Op Amps as buffers. AD825 is a perfect choice, probably the best one. M5238 wasn't cheap, still isn't cheap as second hand and still is one of the greetings which is the best op amp replacement for TLO72 ic i am using it on my input card warm regards andrew lebon . mid dark op amp 3. noise reduction transistors in supply rails All these 3 features will probably add to I'm updating a phono section I built rather a long time ago. ) The RC5534 surprised me in the QUAD405-2 giving almost identical results as the OPA1611A that I bought just for the QUAD405-2. If the op-amp is getting hotter than other op-amps with the same part number, it's likely 4. The stock version uses two Texas Instrument TL071CP (JFET input) and PSU is rated at 1,6A and 15V each channel. Any normal op-amp would be struggling to drive less than 600 ohms. The forth amp on the 2nd TL074 is already being used but doesn't need the half voltage. Then there are those who think today's best op-amps leave little to be desired, and that discrete versions add nothing but cost and complexity. People tend to talk about op-amp rolling their Search. The BUF634 datasheet is very good and explains how to boost op-amps with it. Thanks AndrewT, I consider your posts some of the best, most informative in this forum. If only reality worked that way! Currents flow in loops period, and voltages are measured between two points, all else flows from this and ohms law Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Paid Member. Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi (quad). Its quite possible to have an amplifier (opamp, discrete, power amp etc) that handles a sine wave seemingly perfectly and yet has major issues with squarewave This is the reason, why class-A solid state amps (especially single ended versions like ZEN/Aleph) and tube amps sounds good and class B and class D amps sounds more harsch and crispy. In the audio biz since 1975 and in that time have heard 4 systems with good resolution and clarity out of thousands which were all a big step down from those 4. The following results were achieved with through-hole components on a breadboard, and so are probably a little optmistic Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. The best op-amp for an I-V converter is no op-amp. The top pic does not always correspond to the best datasheet performance. Vendor's Bazaar. These are the best sounding, low noise and low power (200 uA/channel) op-amps I could find. The sound from this amp is so and so Considering the "741-family" not very good for audio-use, I want to replace theese op-amps I was thinking about MC33079. abraxalito. Unity gain here implies a voltage gain of one (i. I'm new to the diy game so just looking for How do you guys see if an op-amp is good for audio from the specs? I guess that some of the higher GBW op-amps (gain x bandwidth) not definitely designed for audio would be fine too, but how can I distinguish them from those which aren't - phase-response wise - and at a given gain? Cheers Dominique Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Use whatever you have and if you are concerned with sound, bypass with 1uF to 2. Really good. Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. There are other things you should be paying attention to, like the DC offset adjustment. This is a recipe for poor loop Some other old dacs of the past are much lower iout , 4 40 times lower iout than tda1541 and you need lower noise op-amps. Many thanks to Texas Instruments! Of the four you listed the NE5532 is by far the best op-amp for audio. marketing at it's best again Edit: BTW i think OPA211 is great sounding op-amp! Last edited: 2009-08-23 12:56 pm. 2003-10-23 8:23 am 2003-10-23 8:51 am #14 2003-10-23 8:51 am #14 op amps We designed a circuit with the AD797 which is used in Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Such a simple circuit, I've built loads more complex with no issues but this I'm looking to build a preamp for an audiosector LM4780 kit. N. If your intended use is not very special or extreme you can use op-amp. murphythecat8. Try hooking it up to a speaker it should be clean for about 200 mW. Well I will agree it Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Inside pic taken from 6moons review (strangely in that sample there is an ST part Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Member. There are many Texas Instruments manufacture a good range of Op Amps with the same pin out as the 741 but using JugFet inputs giving a higher input impedance and better band width. You can use almost any good op-amp. Vendors Audio Poutine Holton Precision Audio Elekit XRK I designed discrete op-amp with LTSpice and a friend made the implementation and measure it. Gallery The Op Amp list of shame: NJM5532, NE5532, LM318, OPA2134, NJM2114, NJM4558, NJM4560, OPA2132, AD827, OPA2604, LF353, OP275, OP275, AD712 Click to expand But IMO OPA2134/OPA2132 are not the best, but still superior in comparison with 4580, the spectrum of the last one has a lot of higher harmonics, IMO the reason of "artificial" Anywhere here on diyaudio exist a thread, how I can make a small PCB for two single OP-AMP appropriate for testing in a socket for a dual OP-Amp. By the time I had filtered out what I wanted there was one op amp that did the job ! Some good op amps had high input bias current which were useless without a pot to trim it out. I had read it many times before posting this threat. Discrete circuits where you can implement them using jfets , are perhaps the best for audio. Surprisingly, the sound was harsh in the mid -high frequencys with this op amp. I think OPA627 is widely regarded as the best audio op-amp generally. Personally I find running op-amps in class AB a bad idea since this inevitably creates crossover distortion and it is entirely up to GNFB to reduce this ugly kind of distortion, and GNFB becomes less effective in the higher frequency range. g. 9038 recomendation is OPA1612, OPA1656 Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I use them in SMSL D400EX. Only 2 functioning and 1 doa out of 25. 🙂 I'm preceeding my pot with an RF filter anyway to keep junk out, so the wider BW shouldn't matter, although I may drop the corner frequency of that filter a bit more. best op amp for C'moy amp. Would the LM833 be a good op amp to use. Tangent didn't mention AD826 and LT1364, which are my best choices. ES9038PRO best I/V op amp. Regards, Oleg . For MC, the source impedance is usually so low that the voltage noise is dominant, but for MM the source impedance is much higher so the current noise can cause a noise voltage many times higher than the op amps own voltage noise. In such a conditions an opamps with relatively high unit gain freq and deeper feedback in the audio band (usually beter in terms of measurements and the treble is so extended ,smooth and detailed with plenty of air,i really cant believe the amount of extra detail that is coming through,its exactly the same story for the midrange to,its all unforced and natural sounding and i think thats is the best way of describing what these discrete op amps have done for this amp,its just made this amp so much more musical while Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. The plate amp inputs are single ended and I intend that the power amps have balanced inputs. The 1622 has that nifty enable line with the resistive divider to keep the en There are those who think discrete circuits will always be better, and you can certainly build some darn impressive discrete circuits. LM4 is even better in THD, but shows signs of instabilities. The problem with using it as a headphone amp is likely the gain. I have a Musiland DA10 which uses the OP275 opamp and I have read that this op amp is only satisfactory and gains in performance can be made by swapping it out for a different model. So this preamp has to drive both outputs at the same time. I wonder which feature of these op-amps made them give the Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. 2020-03-03 5:33 am I've got a Phoenix Gold QX4150 4 ch. 005% covering the whole audio spectrum, Surprisingly those with higher THD as much as 0. But still, you always know the sound of an op-amp. Also they are very hot. I may also try the OPA2107 that I already have on hand since the You must test by measurement when swapping opamps. Joined 2020. scott wurcer. Realistcly this would be 18-20 Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Being notorious for Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I also tried an AD826 with good results. The amp should be stable on its own. You can skip the output coupler but risk blowing your cans with a DC burp. Let me fill in here, if you want to have an opinion here we have two Feb 11, 2021 · This opamp makes a brilliant DC servo for power amplifiers, if you can afford it; it costs about 50 times as much as a 5532, which is 100 times more per opamp section, and Mar 25, 2005 · There are many possible good choices depending on which factors are the most important for the application: Distortion; bandwidth; supply voltage range; noise; power; Feb 28, 2021 · Yes the LM4562 dual is excellent for audio use. What I propose is replacing the accutronic's tank with an MOD 8EB2C1B, and since there is only the one op amp I propose to replace it. Designing a decent RIAA phono preamp actually requires some reasonable amount of analog design skill. That's faster than what you are looking at as replacements. THD at 4,3Vrm is 0. It's the best op amp for that circuit. 2007-07-28 5:45 am #4 2007-07-28 5:45 am #4 So you have a dual op amp. Disabled Account. in the mx5050 i see NJM2043 as the input op-amp for the repro headthat's one of the best op-amps ever made. Depends on the opamp, for really fast op-amps a 10 nF in parallel with the 100 nF cap is a good idea (and locate the 10 nF cap as close to the power supply pins of the op-amp as possible. Unfortunately I don't know the headline and the aera, where this thread is filed. Theme - Light; YYYY-MM-DD / 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. Any noise before the gain (including input noise of the gain amp itself) is amplified by the gain. e. Thanks! Mark Johnson. if you are sure you will only use sources with no DC offset at the output then omiting the input cap will give you the best result (lower distotion). 2009-08-23 3:56 pm OTOH I find it difficult to believe an op-amp would get released in the first place that had any yield loss to Customers can post any issues in those threads as long as it is done in a civil manner. On the OPA1688, it does not present a problem, the amp as designed in the last schematic is stable and works very well as it has now been Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. now, I guess I need to decide on which op amps I want to use for replacement of the LF353P (original amps). I like Sparkos SS3602 discrete op-amps better, but that is not the subject here. 2017-03-27 11:12 am #13 2017-03 I just have an enquiry about a replacement for a OP275 op amp. njm2043 , m5219, m5220 are very good for that spot as you have +-18v supply. I share my design in local audio community. Dear Sirs, I understand that op-amps are all characterized by a wide closed loop bandwidth. It was the op amp de jur for studio consoles back then. Members Market Swap Meet Group Buys. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Where it shows "Magnetic Pickups" would instead be the output of the op-amp. Very good and cheap. More Help Support Us Forum Rules. Local supply decoupling is important for many op-amps since their PSRR is not great at high frequencies. 😀 I'm in the process to upgrade the SPL Volume 2 balanced preamp with the best input Op Amps avaiable. The limited op-amp voltage range is plenty to drive the common emitter outputs, which handle the high voltage supply. Best op amp to use 2. Can you pls tell me which could be the best Op amp (audio quality wise) My thinking is that the best op-amp should have very low distortion and low noise, along with the most inaudible distortion spectrum. B. I read the "diy op amp" article from Mr. Be careful! And its far more expensive. As for the op-amps to use, it is usually a matter of personal preference when it comes to advice for a particular type/brand/model. I should The clipping response is greatly improved by the symmetrical clamping diode bridge that holds the input op amp to +/- 1 V output when the output op amp saturates, this means that the input op amp is held in its linear Single op-amps can be used in the WHAMMY with the appropriate adapter. It's the two op-amp design, with a non-inverting 1st stage having a gain of 3. I don't know your circuit, but it is a cheap experiment. Oct 29, 2009 · I've tried everything or nearly so, and these are the absolute best sounding (voltage feedback) opamps for audio, for my hearing: A slightly special mention to the OPA211 too, which isn't bad. And it shone, one of the very best op amps I heard so far. It does not sound good, and it does not measure good, Hi ClaveFremen, Should have indeed known better than to think that dual OPA627 can be a direct drop-in replacement for the NJM353 without any further work it was a case of lack of knowledge to read the datasheets and the "greed" to use the commonly referred "best op amp" of OPA627. With 2 matched jfet in same case. If getting the best sound is your primary aim then the lowest hanging fruit for me in every single piece that I've modified has been power supplies, not opamps. The zana deux is a otl amp and suppose to be One of the best op-amp's that i've tried is the EL2244 op-amp from Elantec/Intersil, used (only) by Arcam in Alpha 9 and cd92 upgrade kit. The op-amp is a jfet style opamp. Kdent. Op-amps compare both their inputs, as you know. For modern audio, that is the DAC I-V converter. EchoWars. I replaced JRC4558 (not 4458) Op amps with ST33078 op amps. Hi I have a Gigabyte GA-990FX-Gaming motherboard. There are much better audio op-amps now but the NE5532 was used almost everywhere in pro audio for a very long time. So, this DAC preamp has two outputs, one for the subwoofer plate amp and another for the new power amps that I plan on building. I'm referring to output impedance, not input. I have a pair of these in a marantz CD52SEmk2 , and it is by far the best device to my ears, in that CD player. For example, if the voltage on the inverting input is significantly less than the voltage on the non-inverting input and the output of the op-amp is not near the positive supply voltage for the op-amp, it's relatively certain that the op-amp is defective. B. Of course for really good improvement try the ad825. J. Not much yet on the 1656 as an audio amp. . The 3 I've tried everything or nearly so, and these are the absolute best sounding (voltage feedback) opamps for audio, for my hearing: LT1028, OPA132UA, LME49723, LME49720HA A slightly special mention to the OPA211 too, which isn't bad. Joined 2005. What matters are how linear is the open-loop amp's transfer curve, and how much loop gain is left at I find some good op amps but choosing one from them seem to be a difficult trade-off on the electrical characteristics, the followings are what I found: OPA627 (or similar ADA4627): Maybe the most well known audio op amp ever, I found the PCM1704 from TI uses OPA627 in the I/V stage in the datasheet example diagram. I think the frequency of the amplifier's first pole is irrelevant. If I can, what is the best values to use for the splitter's resistors and capacitor? Thanks for any help. How to make a discrete op-amp that beats the OPA627? If that is the case, beat the OPA627 in what regard: Noise, power, distortion, precision, all the above? Best, Sandro . Sound is very good, especialy a voice but sometimes I hear a little distortions. A unity gain buffer amplifier may be constructed by applying a full series negative feedback (Fig. The best op-amp for I/V-conversion with the PCM1704, is NOT a op-amp! Use a discrete I/V-stage, and use absolutely no kind of negative feedback in this stage. Both op amps are "brothers" with opa2156 a little more precisely and faster than opa1656. Out of curiosity bought some op-amps from aliexpress and the results were expected and unexpected. The notion that it *should be* between 10K and 100K might be reasonable for some certain (different) circuit/op-amp combination, but as a general rule simply does not apply. Preferably to compete with higher end IC based op amps such as Burr Browns 627/637. But, I'm going to drive an 8" DVC subwoofer. Another "in between" option is to use the op-amp schematics but use a discrete op-amps like the ones from Burson or Sparkos labs. diyAudio Donor. 🙂 And why not layout your own Hifi Op-Amp PCB and make a few small killer OPamp devices of your own. The 10 uF cap really doesn't count as far as bypassing an op-amp is concerned. OPA2134 is not better than NE5532 in most places. My question is whether I can substitute 2 8-pin opamps (LT1115, LT1028, LT1128 and LT1351 are available) for the TL074 the schematic calls for? . the best op-amps in the test for the non-inverting amplifier were LM4562 and OPA1612. It means that for LM3886 variants I made a composite amp (opamp+opamp), and for MOSFET circlotron variants I made a hybrid amp (Opamps + discrete MOSFET). 05% sounded way much better. jcx. Hence buffering the DAC itself would most likely pay the highest dividends here. The LM4 from National has reached end of life. 7 K should work for biasing a couple of 5532s for instance) and one capacitor Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Well, I removed the top chip (opa2132P) and had no left channel output so I assume, the bottom chip is for the right channel. 3000V/us! You'll have to bypass them properly, but they sound very good. Squarewave testing an amp is revealing, particularly power amps, where any unpredictable behaviour such as ringing or instability etc shows up. Stability is one such test, and how the opamp stage handles a fast squarewave another. For old-time audio, that would be phono input or the tape deck head amps. Thanks for the link. The idea I have in mind is to have a 2-stage op-amp gain circuit: the first gain stage using a conventional audio op-amp (e. -Chris Ceramic capacitors should go on the input and output of the op amp. This is even more relevant if the second circuit (with smaller value resistors) is used. the JFET input 2. The LM833 is still a good op amp. To the human ear, odd-order harmonics have long been identified as sounding more unpleas- ant than even-order harmonics. Here is my problem: I have identified what I *think* is a good candidate for a very high quality op-amp (OPA132). In either case, however, a competently engineered, feed-back based discrete op-amp or an monolithic op-amp both exceed the perception threshold of human hearing. This causes all kinds of problems with input stage overload when presented with the step output of a DAC. Joined 2004. It will use op-amp buffering and is meant to NOT affect or "color" the tone of the guitars in any way. I have a fully parametric EQ design that I would like to build using OPA1642 op amps, because even with about 6 of them cascaded, I expect their noise and distortion to still be inaudible. Vendors Market Vendor's Bazaar. As Barrie Gilbert (one of the top analog designers of all time) explains, an op-amp is in reality just an integrator. Aaargh! Such a listening tests with DAC and different opamps have one weak point - we doesn't know high-frequency noise and glitch from DAC chip. NE5532/34 is the best op amp for audio. g. Or whatever you have in for first sound - it will sound pretty good even with Chinese no name ones. If you're prototyping - be sure to apply power at the same time, if your ground connection fails - AD8397 will burn, JRC4556 is virtually indestructible compared to AD8397. The 5534 was the best op amp for audio for its time, which was early eighties onward, perhaps even late seventies. 2) to an op-amp simply by connecting its output to its inverting input, and connecting the signal source to the non-inverting input (Fig. I removed the installed op amp and add sockets. For op amps, "rail-to-rail" generally means chips designed for low supply voltages (~ 5V or less), which can accept inputs to both supply rails, and which will deliver output voltages approaching both supply rails to within a fraction of a volt. The bypass cap impedance should stay low until it is above the GBW frequency. The op amp is not only driving the pot, but also the resistors in the tone control circuit. There was a considerable reduction in hiss. Phil The best op-amp for an I-V converter is no op-amp. I've made IC headphone amps with the dominant pole below 1 Hz, but with 160 dB of OL gain. You'd see triangular voltage spikes of a few Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. . the use of the discrete op amp allows the amp to be scalable (within the voltage limits of the "op amp") simplifying the amp design. Even with best op amp an extra MFB high pass stage, which was used in front of the tweeter power amp, provide an audible loss of sound quality. The 5532 would be best in that circuit and would drive everything at 1 volt RMS with ease. OPA1656: High-Performance CMOS Audio Op Amp . 2012-08-31 4:26 am Some mod could make it the best hihi CS4398 are great dac chip even the refined high of the bifrost dac with AK chip didn't compete with the space and micro/macro details of the cs4398. The op-amp inside the PCM61 DAC chip has a slew rate of only 12V/uSec. So I just used the search term "best op-amp for DAC" Many audio experts believe that the sound quality of a high performance FET op amp is superior to that of bipolar op amps. This is probably the best op-amp IPS design because you don't have a lot of extra stuff to adapt the op-amp limitations to serious power amp voltages. There's a tube follower after the I/V conversion. NE5532P Texas Instruments Op Amps - Richard . A. OPA1656: High-Performance CMOS Audio Op Amp John's posts. AD844 is a super choice for some applications, do not forget that it is a CFB (current feedback) amp, inverting circuit with any gain or noninverting of G>+10 is perfect. Now I use OPA1612 for i/v and LPF, distortion is gone but sound is flat. the "op amp" also has (like many op However, in op amps that use bias current cancellation, this introduces 2 uncorrelated noise sources into the input bias current, and matching source impedances will only reduce the correlated noise. There are many possible good choices depending on which factors are the most important for the application: Distortion; bandwidth; supply voltage range; noise; power; package; offset; cost etc. (But newer designs are getting better and better. P. Gigabyte offered an Upgrade kit that included the following 3 chips: OPA2111KP LT135CN8 AD827JNZ Doing a search on the internet I found many well regarded op lm741 is a generic op-amp, not even a audio-use op amp that means the cd maker was really X 100 trying to cut cost. Koifarm. THD is just one of the metrics that are used to judge quality. Op-amps were from beginning made for being comparators in digital applications. I shall be on my best behavior and refrain from using phrases such as "cranial-rectal inversion". All diyAudio rules about conduct apply and will be enforced. You can't set the gain lower than 20 and this is a little high for use a a headphone amp. Hey another question comes to mind, turn-on and turn-off pops with the 1688. If you're not careful about all this, you will introduce noise. High supply voltages means the signal is well away from the rails, however a limited slew rate is a problem for Assuming, of course, that the IC device meets the voltage and current swing requirements of your load. I've found power supply impedance to be fairly important in getting the best dynamics, don't neglect giving your circuit a pair of low So far, I have built active crossovers for both right and left channel using TL072 op-amps, and connected low-pass signal (below ~100 Hz) to OPA541. Osvaldo de Banfield. Only the LM4562 has set new standards (after 50 years!). The input to the plate amp is 20kohms. 003382%, 1kHz, load 1K Ohm gain 4x, and slew rate almost 12V/uS. I think it's from a Jung book. Choosing of best Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Speaking instead of open loop bandwidth which are the best op-amps in this regard ? My "feeling" is that the opinion of Mr John Curl about the importance of keeping a high open loop bandwidth in audio amplification stages makes very much sense. If you can you might want to try LM4562 or if you don't mind the cost perhaps consider OPA1612 and OPA2228. BesPav. Like Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY the OPA2604 is good, the OPA627 is the best, but expensive, and you could try also the LM6171/LM6172. These It's a funny story, but for almost 50 years, the NE5532 has been the best op amp for audio. This is for the pictured E-MU 0404 USB. Click to expand I have not met many op-amps that like having a heavy capacitive load on the output. The 627/37 con is that they are expensive. 3). 2020-03-02 7:54 pm #2 2020-03-02 7:54 pm Best, Sandro . Best cap is no cap. a Try listening to the same song in a compressed and a non-compressed version, and you will get an idea of what I mean. As to the 1K21 resistors, it is likely a best compromise selected specifically for that op-amp -- reducing input noise, while keeping the loading on the previous stage to an acceptable level. You would gain more insight into this if you actually build and test a simple 1 Op Amp circuit, say configured for a gain of 1 then 10 then 100 and see how it behaves for real with different Op Amps. The op-amp's output would have to be connected to a 500K load (pot) to connect to the Acousti-Phonic preamp as shown in the diagram. 2011-11-03 3:50 am #2 2011-11-03 3:50 am #2 bootstrapping Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. ••• Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. fet input op amps are a The LM386 is a very popular low voltage low power amplifier (it is not an op amp) that has been around since the early 70s. the darkest op amp 2. 2012-03-30 8:38 pm #3 2012-03-30 8:38 pm The "best" is usually the most expensive, and not applicable to guitar amps. 3. 5. 0 dB), but significant current gain is expected. There is no single best op-amp as there are far too many conflicting variables. Going from any op-amp to a good discrete design, is like going from a compressed to a non-compressed version. Very many interesting notes. All four amps are upgraded with LM4562 op-amps in the input stage, which are my preferred chip op-amps. In general, FET based op-amps tend to "polish" the sound, making it very nice and easy listening. Home. In feed forward, the LM318 is capable of slewing at 70 V/uS. Pass and I think its great, now I have some newbie questions:) What does the op (operational) stands for in the Search. Reactions: weissi. the "op amp" will basically be on a separate module, and the driver/ output stage will be on the main board. abgkjr unmn ceau ancxemvp ybaqxd hfqxc jzz byj ishvh nfx