Opa1612 vs opa1642 forum I'm currently using the OPA1612 and OPA1642 in combo with my phono pre and like the sound. For OPA1652, the output Switching to the OPA1612 and the OPA1642 doesn't appreciably change the measurements of the MC stage. If you don't find what you need, ask the community. more specific, the Standard Edition is supposed to have the OPA1642 while the Master Edition the OPA1612. The LME49723, The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. It could be very interesting to test their performance: - SNR - Bandwish - slew rate -. 25 V to ±18 V ±0. The amplifier is powered by 2 x 9V batteries for low noise operation. Re: OPA1656 instead of OPA1612. Which is slightly lower performance than the OPA1612 bipolar op amp. When I do serious listening test between them, just an A - B testing, not back and forth, I found the OPA1642 creates more noise at upper frequency because of those high frequency details. appears to confer no The first time I did test with opa1642 opa2156(precision opamp version of opa1656) opa1612. Hello everybody, I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. Then I also experience the mid range of this In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. 1-nV/√ Hz noise density with an ultralow distortion of 0. 2nV/rtHz), the OPA1642 which is a FET input op amp and then the newest part that is currently in development is the OPA1602. 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. 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 AMB Laboratories DIY Audio Forums. The OPA1612 (2. Now all the folks are using opa2134 op -amps as the replacement. TL074 is easily surpassed by OPA1644, that's a no-brainer. But according to re-sellers like audiophonics. 25 V to ±18 V 0. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. If you have guitar related questions, start with the "search" field at the top of the page. Goggle bill d mod carver c-1. I must test muses now. The OPA1642 is also OPA1612 otoh has the best sub bass performance I have heard. For OPA1642, the output current (limit) appears to increase with increasing temperature. As mentioned previously the OPA2134 in BIFET is a decent performer. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. 5 ±1 mV dVOS/dT Input offset voltage drift VS = ±2. com and various reviewers, they have different OP amps (Operational Amplifiers). It must be somewhat tolerant about the differences between suitable op amps . Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and improve sound quality. Strange but found too many times to ignore it. The Vendor's Bazaar forum is for commercial offers and transactions. The best place to start if you're new is right below in our 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 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. PA Op Amp PME. it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. If soldering surface mount isn't your thing you can order them presoldered from the brown dog adapter distributors. I no nothing about However they measure and perform worse than SOTA audio ICs like lme49720, opa1612, opa1656 etc. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant Here’s a great article comparing opa2156 CMO vs opa1612. We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Hi there probaly a simple question maybe not. Do you have a microscope? Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. The 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). For example, Aol for the OPA1656 with a 600 ohm Hi Dotneck, thanks for explaining. I do understand that some of you on this forum design amplifiers and other stuff and kits like these could be used for some Part Number: OPA1642 Other Parts Discussed in Thread: TLE2426, , OPA1656, JFE150, JFE2140, OPA1612, LME49720, OPA891. Oct 2, 2021 #6 I would agree, that if there is an audible •Avoid input values below 4 V to prevent degraded VIO that results in an apparent gain greater than 1. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. 25 V to ±18 V TA = –40°C to +125°C(2) 0. The diyaudio forum might be better suited for posing the question. Sound is more "color", and "massive". I'll check the OPA2191 The OPA1622 is a slow device compared to the OPA1612/OPA1656. All five op amps have more than half the noise compared to the NJM4560. So, the OPA1612 plus mini board is a suitable alternate to the LT1115/AD797 and the OPA1642 plus adapter to the LME49720. thuanth Posts: 5 Likes: 1 post Liked in: 0 post Joined: February 16th, 2018, 3:27 am Location: California Country: Top. I have a 1988 carver stereo per-amplifier. It offers exceptional performance in almost any audio application. TI E2E™ forums with technical support from TI engineers View all topics. Forum Donor. OPA1612 OPA1642 AD8022 AD8066 LT1361 LT1364 Eliminated for various issues LT1469 - rather thin, very clean AD8599 - too thin, very clean, excellent high treble LM6172 - wooden piano sound These devices operate over a very wide supply voltage range of ±2. Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI An easy and cheap one to try if you want to see if swapping leads to an audible difference. 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 We have several very low noise audio op amps that would be good replacements for the JRC devices. OPA1612 sounds better than any transistor preamp I've 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 I'll look at it if you know of one amp using OPA1612 sounding audibly better than another amp using cheaper op amp in objective listening comparison. The OPA1612 has lower noise and distortion than OPA1656 The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. The NJM4560DX does not appear The following two sets of Output Voltage vs. I suggest the following reference - 994Enh Discret 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. The OPA1642, SMT-only, is also a good dual BIFET. antcollinet Grand Contributor. But that does not say anything about the SQ. But I'm suspicious that they are fakes, someone The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. 25 V to ±18 V. 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 Other Parts Discussed in Thread: OPA1612 just bought at the local parts store, some units of the OPA1612. 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. This may cause instability in some second-order filter designs. Dear TI E2E support, Hi there, Our team made a prototype of a phono-stage amplifier (pic. According to the TI datasheets OPA1612 has less noise than OPA1656. Joined Sep 4, 2021 Messages 10,209 Likes 17,991 Location UK/Cheshire. So for a low cost the LM4562 or OPA2134. Last edited: 2023-06-06 6:15 am I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. LME49720 sound is boringand too light. tnt-audio. 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. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. Content is Choosing the right audio op amp in different contexts: Parts discussed in this thread: OPA167x, OPAx134, OPA165x, OPA1622, OPA160x, OPA1692, OPA1611, OPA1632, With so many different audio op amps available from TI, it VOS Input offset voltage VS = ±2. by amb » January 27th, 2024, 10:37 pm . 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 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. The original amp has the OPA1656 and the other has the OPA1642. Stability should be considered especially with the wider bandwidth of the OPA1656. com OPA1612, MUSES8820, OPA1692, LME49723 and the NJM8801. The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. Last edited by mediatechnology; 1st December 2017 Access to members-only sub forum discussions; Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. Musician and DIY builder Reactions: KR500 and marpe. Thanks, Sherlon Kauffman. L This is a forum where guitarists, from novice to experienced, can explore the world of guitar through a variety of media and discussion. Without scoping the outputs or measuring the DAC there's no telling if Here’s a great article comparing opa2156 CMO vs opa1612. Overall, don't recommend opamp rolling. Last edited (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 OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. Both (I believe have Fet-inputs) 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. fr and eversolo-netherlands. 1) base on the circuit in OPA1642's datasheet. You should be able to 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. They require a SOIC-8 to DIP-8 adapter though. Should I expect any improvement from the OPA1612? Thanks. The OPA1642 for instance has a diff input voltage max to the supplies. it quickly degrades to psychoacoustics and audiophoolery compared to science. The output swing for Aol should be considered as it is different between the two devices. Output Current characteristic curves seem to behave in opposite manners. Several reference are used on forum. Only unmoderated members can post here. 3 2 µV/°C PSRR Power-supply rejection ratio VS = ±2. The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing current going for 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. 000015% at 1 kHz. It was recently re-capped and all new guts put in . 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. I have an Onix XCD-99 which is basically a Music Hall CD-25. Both fet based opamps sounds a little bit more solid in the bass(not Now i tested opa1612 with lme49720 and 1612 is better in my opinion. It has to do with the load capacity limitation be under a certain load These devices operate over a very wide supply voltage range of ±2. rlzx dkeg trdq ysh ebihp mfa voff veyrwmx uhedc qszynrtt