Opa1612 diyaudio for sale

Opa1612 diyaudio for sale. Dec 25, 2019 · Mike just answered an email I sent him regarding the quality of the stock Purifi input board. Mar 17, 2019 · The OPA1641 would be slightly better. 23 hours ago · As above , new from spare/ original box include shipping 800 USD. . I noticed a low-cost headphone amplifier board based on Mar 30, 2012 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. common mode voltage that I've measured on any op amp. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. It works, and I like the way it sounds, but the volume control issue is annoying. AD8620 OPA1612 OPA2827 I currently have 2x AD8620AR for sale, thanks ian 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). It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. Nice it has DIP version!, no need for adapters. With a low price and nevertheless minimum THD. Aug 22, 2009 · I just noticed today on the TI web site that the OPA1611 (single) and OPA1612 are finally reality. Higher than 10USD for opamp is too expensive for me, I am quite contented with LME49860. Feb 25, 2023 · Note that the op-amps are 4 x OPA1612, not the ones shown in the picture. It has a strong output stage as well as JFET inputs. I've seen mention of these on various threads in this and other forums. 15ppm, intermodulation way below that, 1. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as 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. Jan 6, 2020 · So, you try different devices and measure. He’s optimized the distortion for the OPA1612 into the TPA6120A2 for lowest distortion and that’s not what I’m about. Jun 24, 2013 · Another thing, read that concerning OPA2156 (big brother of OPA1656, CMOS type): OPA2156: HiFi in CMOS – QuantAsylum Please consider to replace NE5532 by OPA1656/2156, it's not very expensive(around 3$) OPA1612 is already better than 5532 and it's beated by OPA2156: Jun 24, 2013 · If you have gamerpaddy's module, just bypass the opamp section of D400 or D100 (solder a wire from the input terminals then solder it directly to input coupling caps, attached pic). 1-nV/√ Hz noise density with an ultralow distortion of 0. I changed to LM6172 and also reduced the size of the caps in the feedback loop. It enabled the use of better components (actual measured performance) that otherwise Jul 26, 2020 · I agree with you, OPA1612 is really good regarding details resolution, OPA1656 has the best of both world : ultra high definition regarding micro details and very neutral but still warm. Jan 26, 2012 · The diyAudio Store; Parts Connexion; Mini DSP; If there is one for sale, I should buy one. 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. I went through several iterations and settled on JFET buffers to raise the input impedance. Thanks for the information on "running hotter". another in "ideal" situations, but often this is of absolutely no use once you actually start installing these devices in place of another one in a particular circuit topology. These discrete regulators already exceed the PSRR and self noise of the Apr 26, 2018 · Comparing it to the OPA1612, I may be hearing the difference between the OPA1612's bipolar inputs and either JFET or FET inputs in the YELLOW device. No hump at all and IMD of two devices together looks quite low, at least 3 times better vs DIY 9038PRO(which is 12x times more expensive vs 9038Q2M) I have to remeasure DR/SNR and THD+N as well, because OPA1656 is May 19, 2004 · If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. Even AD797 or OP627 cant hold a candle vs OPA1612 in terms of SQ - the difference is HUGE! My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. Which OPAMP in DAC for 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. First project :: XU216/AK4499/OPA1612 :: DAC Pinout & circuit examples. This combination will sound slightly more clinical than the OPA2228/OPA2822 combination. Much smaller caps work fine with LM6172 because of its phenomenal slew rate. Swap Meet. Find parameters, ordering and quality information. My workshop is for fun and not to produce a product. Mouser offers inventory, pricing, & datasheets for OPA1612 Series Audio Amplifiers. I ordered OPA2365 to replace Jul 24, 2012 · I have the Essence ST, same DAC circuitry as STX I believe. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. Jun 5, 2023 · Trying to figure out whether they're fake is part of the fun Here's my OPA1612 from Ali (sorry for the residue, I didn't bother cleaning the chip): Upon testing it seems to have a 150nA input bias current. I'm using the OPA1612 dual opamp in a commercial design. Of course, I do not go to use "special" $4 LDO from ESS when I can take opa1612 and get less noise. Mar 22, 2022 · The OPA1612 is one of the best I’ve ever encountered, the LME 49720 are hard to beat at any price……. May 8, 2011 · Speed is an issue, though. i expected them to put some 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 The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Jul 5, 2006 · What are the general impressions of OPA2365. I have a Technics MASH cd player with the SMDs type of opamps needed. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. The higher current drive of the OPA2822 would be beneficial. Of course layout and bypass design matter along with the basic circuit as shown on the schematic, its not just the chip. CMRR is not a big issue. 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. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. TI/Burr Brown's OPA2604 is a good alternative as well. 1 day ago · Find many great new & used options and get the best deals for New Lot TexasInstruments OPA1612 2-Circuit 8-Pin DIP Operationa Japan New at the best online prices at eBay! Free shipping for many products! The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. BUF634A is as cheap as the TPA6120 and doesn’t need any stability care. 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 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. But, for me, I simply don’t care for monolithic OPAs. 022uf. TI’s OPA1612 is a SoundPlus™ Audio Operational Amplifier with 1. Jan 23, 2009 · Hello samsagaz-I am sure that everyone here will agree that the "specs" often given for various IC op-amps might help differentiate between the possible performance of one chip vs. Dec 12, 2019 · It would most likely be +/-15V (30V total). I love details clarity, soundstage - listen to rock classical and vocals. I am using the digital coaxial input and the left-right RCA jacks output to my Dynaco ST-70 series ii amplifier. Oct 7, 2020 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Opa1656 has good phase response at high frequency. 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. <edit> As for why people say FET input sounds better - its most probably about RF immunity of the LTP input. Jul 5, 2006 · Standard opamp for that has pretty much become OPA1612. Here's what he said: "The board already has exotic Bruno Putzeys designed discrete regulators that power the onboard TI OPA1612 opamps, as well as the amplifier modulator boards. Just check the rails aren't over +/-18V. OPA1612 Series Audio Amplifiers are available at Mouser Electronics. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, AD8066, 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. Generating higher levels of H2 would be fun. compatible crossover also available for sale. The idea is to use it as an output buffer for my standalone volume controller/source selector with the direct headphones drive capability. 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…. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. It will perfectly work. Home. May 4, 2016 · I’ve been following the thread "New Audio Op Amp - OPA1622" for a while and at some point decided to make myself a new universal buffer/headamp based on the OPA1622. I got free shipping with Element14 till 29th of this month Feb 11, 2021 · 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). May 19, 2004 · Temporary conclusion may be OPA1612 for Springsteen and OPA2134 for Pinnock. 3 MHz. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. But I still have two AB tests going on between the two, eagerly awaiting the results 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. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). Nov 2, 2010 · Would like to replace my Denon's DCD-1500AE opamps of the NE5532 type with something better, OPA2604 and AD823 are two candidates with identical pin layouts - which should i choose? i also need a SMD version (is it called SOIC?) for my PCB, are they available in such packaging? any other Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. 1nV/root Hz at 1kHz with a 10Hz 1/f corner and will cheerfully drive 600 ohms. Jun 24, 2013 · Sylph-D100 repeat measurements, using OPA1656, LRS-350-36 adjusted to 38V Motu Ultralite MK5 ADC, SMSL DO100 DAC (can drive the output up to 16Vrms) Needs a DAC with 5Vrms out to drive the amp into 20Vrms (100W 4ohms) Dominant 2nd harmonic due to inductor selection. 000 (DIY!) tube preamp with tube Jan 5, 2020 · I decided to give an OPA1612 + 2 x BUF634A (per channel, a total of four) composite a shot for the ES9038PRO I/V. For Sale Quad 99 preamp , Boxed, Remote Control . -60dbfs. It ensures a very low noise density of 1. PCM1794, OPA1612 . 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. 6 days ago · 2sk170BL N jfets - 80 total pieces available for sale - selling 1 set of 10 pieces for $80 total; 2sc5171 Tosh NPN driver transistors - 80 total pieces available for sale - selling 1 set of 4 pieces for $48 total; LSK170B N jfets - pending. For the case of May 26, 2016 · 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. 23 hours ago · All diyAudio rules about conduct apply and will be enforced. 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. Bad idea. OPA1656 sounded worst, Muses 8920 sounded best. Sylph-D400 5W 4ohms using Jun 24, 2013 · Be sure with LME48960 (my best sounding OPA, better than OPA1612/1656) and 1D23A the sound (and the measurements) will be better Lelon for the 4 tank caps is not a good choice Lester (value?), i think Pana FC much be really better for a reasonnable price Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. Oct 8, 2001 · My choice would be OPA1612 oder ADA4898-2. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 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. 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. 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 have a China made DAC in which they used AD8397 for the headphone OUT. Members Market Swap Meet Group Buys. 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. Dec 11, 2018 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. 1-nV/√Hz as well as an extremely low distortion level of 0. Jul 4, 2021 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Which OPAMP in DAC for smoother sound TL072 or OPA1612 . 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. Headphone output stage is basically a Cmoy operating at single supply 3. 000015% at 1 kHz. What's not to like with that, and all the other SoundPlus family? Craig ••• Jan 5, 2020 · I did replace OPA1612 for OPA1656, and also switched ADC input range for the 1. :forbiddn: Yes ferrites should be individually wrapped, or better placed in a tray. Harmonic distortion <0. May 15, 2022 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I initially saw both the low input impedance and the signal inversion as potential drawbacks. 8 bucks for a genuine part. It sounds fine, just slightly better than my HTC Desire 820 Dual SIM. Although you need OPA1612 and good 4 layer layout on an external module to get 106dB SINAD (5W 4R) on both D100 and D400. My first tests were with an OPA1612 (equivalent to OPA2211) in the instrumentation stage, but I didn't manage to get the circuit ringing free under all circumstances due to sloppy wiring, decoupling and grounding. 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. I'm not sure on the output current. Diy DAC/amp with PCM2707 Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. "All inductors were placed inside a bubble wrap bag" Bad very bad package for ferrite materials. OTOH the TPA6120 gain is not needed, for controlling the distortions. (1/3 of opa1612 cost) with very high symmetry of the input stage 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. Maybe it's too soon for anyone to have obtained and evaluated samples, but -- well -- has anyone yet? Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. 8Vrms and remeasured the range -15dbfs. Mar 17, 2019 · TI's SoundPlus opamp family are astonishingly superb designs. Jun 24, 2013 · Here is the real problem. While improving on the flaws, some of the IC's SMD legs gave up and broke off. It's best use as an alternative to opa1612 when noise is not a big concern. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. 000015% at 1kHz. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. It has the most stable input capacitance vs. I won't know for sure until Mark reveals the opamp device identifications. ••• Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. 1nV/√Hz Noise, Low THD and Precision. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. Jul 5, 2006 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. 1 nV/√Hz noise density with an ultra-low distortion of 0. I measured and tagged every jfet with a piece of masking tape. 1/f corners: OPA1612 ---- 10 Hz OPA1642 ---- 20 Hz OPA1656 ---- 1 kHz OPA2162 ---- 1 kHz It also looks like the OPA1642 and OPA2162 are not happy driving 600 ohms, but the Jan 5, 2020 · the schematic is pretty much the same as shown above, only for a single chip, and FDA input, + switchable input resistors. BTW, last year I crippled my €4. Also, I using CT7601 USB UAC2 because of cheaper and less current draw. Cheers, Greg ••• Jun 24, 2013 · Sure, I will add them on my list, so OPA1612 and LT1364 on my next order. Jul 25, 2016 · Hello all My Marantz and most of my CD players have the LM4562 which I find is great. 5 metre cable at 33. 5 V. Years later they have tape 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. Jul 5, 2006 · Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. 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. For Sale Quad 99 Mar 17, 2019 · The OPA1641 would be slightly better. Feb 11, 2021 · I think the problem I'm seeing with the OPA2156, and to a lesser extent the OPA1656 is that the 1/f knee for the noise is much higher than for the OPA1612 and OPA1642. I've done more research and actually have decided against the 2211 and will be using the opa1612 instead for the following reasons: - opa1612 supports 45ma full output current (which could be useful since it's an output buffer stage driving unknown amplifier impedance Feb 11, 2021 · 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 . mosg bqpn ojart euk jzrwy fohdq nsog fzds jgd iwwl