Opa1612 vs opa1642 forum reddit. Jim Williams Audio Upgrades Facebook X Reddit LinkedIn Post Reply Welcome to the Gearspace Pro Audio Community! to members-only giveaways & competitions; Interact with VIP industry experts in our guest Q&As; Access to members OPA1612 VS MUSE02 ทั้งคู่เป็น BiPolar เหมือนกัน เสียงต่างกันไม่มากนัก OPA1612 เสียงจะสว่าง และ สะอาดกว่า ส่วน MUSE02 เสียงกลางจะมีน้ำหนักกว่า opa1612 与 . 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. The soundstage is the only good part, it's the wider due to the bass boost and upper midrange scoop. In comparing the spec sheets of OPA627B and ADA4627B-1, the current noise specs are identical (1. 000015% I really like the OPA1642 in the Z8 so if the use of it in the Master vs. While it still has some treble sparkle, It isn't enough to save its sound of complete mudyness and lack of detail. ••• Forum Donor. Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. I have replaced an OPA1611 in the second stage of a MC preamp with an OPA1642 + adapter with no problems, and I've replaced an LT1115/AD797 in the front end of the same preamp with an OPA1612 + adapter with no problems. 5 V - single supply - I would not be surprised to find some common-mode issues. It offers exceptional performance in almost any audio application. Perhaps it's a further development. This device operates over a very wide supply range of ±2. There's much オペアンプの違いによる音質比較表を、店主の主観たっぷりに紹介しているので、オペアンプ交換の参考にして欲しい。 It's easy to convince oneself of an improvement only to find out later that it actually was the opposite. Originally we used OP 275, we adopted OPA 1642 for recent lot. As mentioned previously the OPA2134 in BIFET is a decent performer. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. 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. My own conclusions with MUSES: In I/V stage: - MUSES8920 is Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA1642: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 865Kb / 25P [Old version Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Forums. Joined May 28, 2020 Messages 1,861 Likes 7,160. The higher current drive of the OPA2822 would be beneficial. OPA2134 is basic hi quality Op-Amp and all rounder Op-Amp with great Just replace the original op-amp with one with a similar specification, if it's not possible to find an exact replacement. This is the forum where I always feel 2 nd: We notice popcorn noise (symmetric stage), change the OPA1642 and the popcorn noise doesn’t disappear. In singles, OPA627, OPA827, OPA1611, AD797 and AD8065 will comfortably beat the TL081 and almost everything else. It is more open sounding and clearer sound from OPA1612 then OPA2134. People complain about derailed threads on reddit, but its way way way more annoying on forums in my experience. Anyway, Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. 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. 00 : Crosstalk - 110dB PSRR - 80dB min, typ 100dB Distortion - 0. Should I expect any improvement from the OPA1612? Thanks. Español $ USD United States. It is far better than PGA, MAS, CS or similar. Results are very good (example in attachment), but uP is a must. OPA1612/2211 has excellent CMRR but PSRR isn't stellar and strictly follows OLG. Old op-amps such as the LF412 and TL072 are Technically speaking, it's really hard to beat opamps like AD797, AD8599, OPA1612, OPA1656, so it might be safer to use one of these over the "exotic" ones, My OP1656 OpAmp Review. Output Current characteristic curves seem to behave in opposite manners. 000015% THD or the OPA1642 if JFET is the way to go. Measurements posted in this Forum are merely a guide and subject to errors in testing, and that is why equipment can show poor results on graphs and yet sound better in real life, real world Facebook Reddit Pinterest Tumblr WhatsApp 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 Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, I bought 10 OPA1612 from a chinese ebay seller. Hello guys, About half a year ago I decided to design my own high performance headphone amplifier. Featured Vendors Speed is an issue, though. We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). The 22v would that be too much for the OPA1612? The JEFT transistors are very low noise 0. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. Content is provided "as is" by TI and community Stability should be considered especially with the wider bandwidth of the OPA1656. For high source impedance sensors such as a phono cartridge lower current 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. --lme49722 lme4562 lm4562 opamp 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. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. Opa1642 4. They are ~6. 08 @ Mouser). Skip to Main Content (800) 346-6873. Thanks, Sherlon Kauffman. So i expected to get fakes but i wanted to know it for shure. Additionally the OPA1642 sounds fine to me with the PCM1793 chip. Jan 14, 2023 Yes it is, but for that plenty of other options are available. 022uf film foil were only caps in audio path she picked the Two caps in parallel form a series RLC circuit with the values of R,L,C equal to the series combination of all corresponding elements. agdraudio. Replacing the lesser quality opamps in another Technics player with the OPA1642, the improvements were noticed right away, even was better to my ears over the other identical Technics player with upgraded LME49860. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the Aren't you comparing the the that1512 at 60dB gain vs the opa1612 at 0dB gain ? At x1, the that1512 is -100dB thd+n (0,001%). 6mA: 140dB: 120dB: 0. 1mV: 60000pA: 114dB: 40MHz: OPA1641: 1: 0. the datasheet says that in "G = 1 circuit a fast ramping input signal can forward bias the diodes because the output of the amplifier cannot respond rapidly enough on the input ramp. These are SOIC8 size, but you can buy OPA1612 opamps on eBay pre-soldered on a SOIC to DIP adapter. The dual version of the OPA1641 is an OPA1642, but I'm confused as I believe that neither the Burson nor the OPA627 are duals. @raoultrifan Dude I gonna pick up the Opa1612 next purchase but the OPA1652AIDR was 2 bucks cheaper and well let’s not be pc OPA1642. I have a 1988 carver stereo per-amplifier. My phono preamp, bye the way, uses OPA1611/1612 and OPA1641/1642s- amongst others. opa1642 is actually really good. The output swing for Aol should be considered as it is different between the two devices. In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. The OPA1612 (2. Facebook The OPA1622, dual, bipolar-input, SoundPlus™ audio operational amplifier achieves a very low, 2. BTW, last year I crippled my €4. The OPA1611 Hi all, Tried few OPAMPs myself in I/V, LPF, VAS and BUFFER stages with my Essence One DAC/headamp, like: NE5532, LM4562, NJR2114, OPA1602, LME49720, MUSES8820, MUSES8920, OPA2604, OPA1642, OPA2132PA, AD8672, AD8599, MUSES01, MUSES02. Find parameters, ordering and quality information OPA1642 Datasheet. I almost went that way, but Parts Connexion has super low prices on the OPA2134. OPA1612-Q1: 1Mb / 31P [Old version datasheet] SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier Burr-Brown (TI) OPA134_071: 403Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS OPA134: 432Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS More results. With the 25% off sale, they were less than half the price they are at Mouser and Digikey. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Once I saw on TV a shootout Jaguar vs Porsche with many car experts and journalists as judges. The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. 000015% VS OPA1642 on the standard DMP-A6 The Vendor's Bazaar forum is for commercial offers and transactions. Next, OPA828 was evaluated as a gain or VAS section in a small A class power amplifier with extreme performance (2 MHz power bandwidth, 200 ns rise time, 0. ). 29. But, for me, I simply don’t care for monolithic OPAs. 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. Audio, Audio, Audio! 输出部分则选用了两片时下美国德州仪器出产的最受发烧友好评的发烧运放opa1612，opa1612是ti推出的一款性能相当优异、双通道、双极输入音频运算放大器。 胆味和醇厚绵密的味道，输出端还特别增加了一枚ti新构架的场效应jfet音频专用的发烧运放opa1642，该运 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. OPA1642, OPA1612. I kept the test output level at 0dBV to avoid visible THD contribution from the sound card. View all forum topics. Only unmoderated members can post here. this is only If I have to modify something that comes with very old OPAmps. This OPA has a rail-to-rail output toggle at 600mV with a 2K Ohm load, improving Audio Newbie/Beginner Technical Forum . 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. has slightly less voltage noise but also slightly more current noise; slightly faster and less THD, but worse CMRR. Damping factor is R/2 sqrt( C/L ) and should be >1 to avoid ringing. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. 3 nV/√ Hz noise density with an ultralow distortion of 0. Funny you should ask On forums its a little more difficult and often the discussion has already been so thoroughly derailed it doesn't fully recover. It's made on the same process as OPA1612, OPA1642, OPA1622, OPA1692, and many others. 8-nV/√ Hz noise density with an ultralow THD+N of –119. Joined Jun 16, 2020 Messages 10,989 Likes 19,595 Location Netherlands. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and OPA1611, OPA1612 www. Joined 2010. Texas Instruments OPA1612 ระดับ วงจรขยายระบบเสียง มีจำหน่ายที่ Mouser Electronics Mouser ให้บริการสินค้าคงคลัง การประเมินราคา และใบข้อมูลสำหรับ Texas Instruments OPA1612 电子发烧友网为你提供ti(ti)opa1642相关产品参数、数据手册，更有opa1642的引脚图、接线图、封装手册、中文资料、英文资料，opa1642真值表，opa1642管脚等资料，希望可以帮助到广大的电子工程师们。 OPA1642, OPA140, and OPA827 all use a similar FET front end, designed not to exhibit the nonlinear junction capacitance that classical FET input architectures do. 00005% at 1 kHz. 5-nV/√ Hz noise density with an ultra-low distortion of 0. 0 2280 protocol, up to 4TB Gode tilbud fra hylderne hos hi-fi forum. After changing every opamp in the listening path to OPA1612, the neutrality and precision of the OPA1612 really shines through. 00003% at 1kHz. 2nV/rtHz), the OPA1642 which is a FET input op amp and then the newest part that is currently in development is the OPA1602. After another switch, back to the OPA1642, it sounded 'muddy' in comparison. 75us TC in input stage to optimize overload characteristic- approx. Can't remember exactly but it was like 12 vs 0 in favor of The OPA 1612 ( a bi-polar device) is an EXCELLENT choice for low-impedance sources (microphone, phono cartridge, most line-level applications). Attachments. AskEngineers is a forum for questions about the technologies, standards, and processes used to design & build these systems, as well as for questions about the engineering profession and its many disciplines. 004% @20KHz The above parameters are insignificant to the audio level variations imposed by substandard audio recordings, room modes and compromised The OPA1662 (dual) and OPA1664 (quad) series of bipolar-input operational amplifiers achieve a low 3. 2209 has particularly an amazing resolution and detail level with a Great deal of soundstage depth. Its low gain bandwidth makes OPA1642 a nice option for retrofits, it will work If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Previously i used OPA2134 Op-Amps in my DIY project and CD/DVD modification and after abou year ago i start to use OPA1612. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. Transients are stronger, both rimshots of snare drum and big-band trumpets. We would like to show you a description here but the site won’t allow us. Trying a second OPA1642 the popcorn noise is still there. It has to do with the load capacity limitation be under a certain load In places less hospitable to LME49720, OPA1612 has proven to be a very useful opamp for dac I/V and or differential summing. bipolarer Eingang OPA1611 — Energieeffizienter Präzisions-Operationsverstärker mit 1,1nV/√Hz Rauschen OPA1612 Frequency (Hz) Voltage Noise Density (nV/ Hz) 1 10 100 10 100 1k 10k 100k 1M 10M C020 + + ± ± Treble Bass +15-15 1/2 OPA1656 1/2 OPA1656 Input Output Pad Product OPA1612 with ultra-low noise and low distortion 1 KHz 0. The amp OPA1612到了后，自己先试了试OPA1612+JRC5532，感觉和OPA1642+JRC5532没什么区别，我试了好些碟，也试不出来什么区别；三频几乎没有差别，打分还是一样的，90分水平； OPA1612+OPA1612，这个组合的高频给我非常好的感受，比OPA1642+JRC5532明显更细腻一点，高频的线条感更好 Site Site Announcements Forum Problems & Feedback Terms and Rules. If you'd prefer to use a bipolar 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 Buy and try several. It outperforms most other opamps, very low noise & distortion, doesn't In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. It appears that the OPA1611/2 have a lower noise These are probably among the two highest of the best sounding dual opamps around today. OPA1612A OPA1612AID OPA1612 OPA1611 OPA1612AQDRQ1 OPA1662 OPA1632D OPA1662AID OPA1602AID OPA1611AID OPA1652 OPA1642 OPA1632 OPA1612AIDR OPA1641 OPA1602DR OPA1632DG4 OPA1642AID OPA1652AID %PDF-1. The 4627 is faster the the 627 (82v/uSec vs. The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. com. The DC feedback amps are an AD712. Other Parts Discussed in Thread: LME49720, LM4562, OPA1654, OP07, OPA2134, TL072, OPA1652 首先关于LME49710、LME49720、LM4562这3款运放一直有个疑问，究竟这三者之间是什么关系，LME49710是单运放，另外2款是双运放，LM4562是LME49710的双运放版 OPA1612: 2: 0. Good direct subtitution for Op-amps inside Technics CD question? OPA2132, OPA2134, OPA1642, LM6172 etc. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. Would the AR sound brighter? Reddit Pinterest Tumblr WhatsApp Email Share Link. 4 %âãÏÓ 2 0 obj >stream xœ½[]l G NŠSK~h”’DI“´›&P»Ž73;³ ’Ú××IPlççb \ ×öurSûÚ¹¾ $ü¼ >TBB µ´ B Ê¿D ´¢¢@% - xâ Not to sure whether its still available, you can register with Brown Burr on the Texas Instrument site and provided you are doing R&D not for military purposes, you can order the OPA1612, OPA1642 on SOIC devices free as SAMPLE for R&D and place them on an adaptor that converts from SOIC to dip 8. OPA1612 with ultra-low noise and low distortion 1KHz 0. New Audio Op Amp - OPA1622. 2 mA BUF634A Wide Bandwidth Mode: 210 MHz / 8. In note slyt630. 28dB at rated -9dBv output at all frequencies up to greater than 50kHz with +/ OK, start from scratch - on the diyaudio forum there's a highly regarded ES9038Q2M DAC + output stage, which uses quite modern opamps - OPA1622 for first stage, and OPA1612 for second stage. I took out the Audio Jade AD797BR from my Zishan Z1 because it's too dark. 5 V) tends to be run inverting anyway since common-mode input range would be OPA1642 (JFET but otherwise similar to the 1612) These will have to be mounted on browndog adapters. Plus they come standard in the 8-pin The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. Facebook Twitter Reddit Pinterest 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. Or check it out in the app stores TOPICS. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. 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, For duals, any of LT1057, LT1213, LT1361, LT1364, LM4562/LME49720, LME49722, LME49860, LME49880, LME49990, OPA1612, OPA1642 will comfortably beat the TL082. Is it possible to drop in some better Op-amp insted of that what in now in place? Any sugestions will be good? Facebook Twitter Reddit Pinterest Tumblr I swapped these for several different op amps including OPA1612, Burson V6 Vivid, and OPA627. The data sheet is very handy for audio designers working with 600Ω loads, but also presents apparently conflicting specs, and lacks 2KΩ load data. After confirming the fault condition Three pins of Pin 8 + Supply, Pin 5 + INPUT, and Pin 4 - Supply were short-circuited inside OPA1612 1612 will sound warmer, thicker, mellower and darker with most headphones and IEMs. The OPA1622 offers extremely-high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. 2019-02-10 5:48 am #412 2019-02-10 5:48 am #412 OPA2156: Is there a THD vs. The OPA1622 is a slow device compared to the OPA1612/OPA1656. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. by amb » January 27th, 2024, 10:37 pm . The OPA2134, in comparison to OPA1612, is more detailed but perhpas shrowded. Facebook Twitter Reddit Pinterest Tumblr OPA1642 was clearly beat by OPA1612 being more "rocky" and forward. We changed the OPA1642 by the OPA1652, no change, the popcorn noise is still there. Pin can be left floating or connected to any voltage between (V–) The original amp has the OPA1656 and the other has the OPA1642. . TL072 is not in the same league, I replaced those decades ago already for better performing types. JFET-Input Audio Op Amps OPA1642 TI E2E™ forums with technical support from MASH covers a few different number of bits in the output - the DAC output could just be switches if 802 is LM833, its bjt input isn't suited to the circuit filter/feedback impedances - really should be a jfet type OPA1642 looks good on paper, better when you read the chatter from TI engineer on the project I would worry that there simply isn't We would like to show you a description here but the site won’t allow us. diyAudio 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. OK, which one is the best now OPA1612 or OPA1642?? The OPA1612 does not seem to have the process contamination of the LM497X0 that produces rocky-sounding noise. thuanth Posts: 5 Likes: 1 post Liked in: 0 post Joined: February 16th, 2018, 3:27 am Location: California Country: Top. output voltage plot/measurement into 200R (or so) Has anyone cant really remember ad815, but plenty of experience with opa1612 and opa1632. Two identical gain 11 amplifiers were tested. Other Parts Discussed in Thread: OPA1642 , OPA1622 大家好。我使用OPA1642+OPA1622搭建了一个简单耳放电路，OPA1642接电流输出型dac作IV转换，OPA1622作差分运放接耳机负载。我发现音频段内所有频率都会有很大的失真，不知道问题出在哪里，还请工程师帮忙看一下 Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. It provides a very low noise density of 1. 8 or 2. JFET inputs let you work with a larger range of input Now i tested opa1612 with lme49720 and 1612 is better in my opinion. 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 Comparing the two parts: LME49600 Wide Bandwidth Mode: 180 MHz / 13. 000 (DIY!) tube preamp with Lets take a look at the NE5532 op-amp, used in audio products everywhere since 1979 and it costs about a $1. Both (I believe Sometime I use OPA1612, OPA1642 and OPA1622. Get the Reddit app Scan this QR code to download the app now. Last edited: 2020-10-05 9:04 pm More options The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. Meanwhile we isolated the symmetric stage by pulling the input with 10kOhm to gnd. The Here’s a great article comparing opa2156 CMO vs opa1612. Real low-voltage stuff (think 1. 000015% at 1kHz. Misc. 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. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Pin can be left floating or connected to any voltage between (V–) I have an Onix XCD-99 which is basically a Music Hall CD-25. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. 1nV/sqrt(Hz) and 0. This OPA provides very good electrical and audio performance. Oct 2, 2021 I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. Featured Vendors Even better, try the OPA1612 (if input current isn't a big problem). The OPA1612 has lower noise and distortion The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. 000015%: 1. Featured Vendors the LME49990 and the OPA1612. PA Op Amp Optional parallel input amps-2x LT1115/AD797/OPA1611 or OPA1612 for MC 2x OPA1641 or similar or OPA1656/OPA1642 for MM Cartridge load components can be altered without soldering. Sound is more "color", and "massive". 6fA @100 Hz), and the voltage noise favors the 627 only slightly (4. Every amp. These devices also have a high output drive capability of ±30 mA. I payed 6. Which is slightly lower performance than the OPA1612 bipolar op amp. I tried on smsl m3 a few months ago but not on d10. By newer I meantnewer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. He’s optimized the distortion for the OPA1612 into the TPA6120A2 for lowest distortion and that’s not what I’m about. pdf (sorry, pasting the address makes a huge link) you use a OPA1611, OPA1612 www. I also really liked the OPA627 that I had in an audio-gd dac years ago. For some reason I refuse to use it as often as I can though, being CMOS. Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI engineers. English. Below is a comparison between OPA1656 and OPA1642. OPA627BP vs OPA627 . Furthermore, this OPA features rail-to-rail output switching at Forum Donor. Last edited by mediatechnology; 30th November 2017 at 11:52 PM. Old P990 opamp FEATURES Kn0ppers, Yes, differing device means differing bias current vs common-mode voltage, which would change the distortion profile. 900,00 kr. 8ma quiescent current per channel - half as much as OPA2134,OPA1656 is the best boise performer now, but there many different purposes with different requirements. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you i tryed lme49722 opa2134 and opa1612 ,--. I found that OPA1612 was in the ultimate soundplus collection that's why i have change for it. Even the Voltage noise spectral density curve in the OPA1612 datasheet figure 32 shows lower noise when the source resistance is low. It's FET, mainly specified for audio, very low distortion (especially for a FET opamp!), low supply current (1. com Open. I don't like the highs of OPA1612 though, they sound It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 Low- and Mid-Frequency Test Signals for Evaluation of Room Modes // Measurements: ESS Hump revisited // Humpify -- apply "ESS TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. It has rail to rail differential 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. Marketplace Home. Re: OPA1656 instead of OPA1612. It's especially difficult to test the mod in an active speaker scientifically (since there's no output where you can simply measure THD etc. Site Site Announcements Forum Problems & Feedback Terms and Rules. General Audio Discussion . 000015% at 1 kHz. vs a Topping E30 II (150€) vs the internal DAC on a Marantz CD-Player. That's 36dB worse than the opa1612, not 50. Yes, I know everyone likes to think you need GHz op-amps for I/V. I don't care about listening tests or something else, just 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've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). It's best use as an alternative to opa1612 when noise is not a big concern. I got by far the best sound with the Muses 02. Tilbud Unpopular opinion- If you are talking about measured performance in the audio band, it probably is OPA1612 or LME49720. Part #: OPA1642. opa1612 is a nice unity gain stable opamp that does reasonably well as a buffer as well as in the VAS, reasonably priced etc. Is there going to be a sonic difference running dual mono when listening to stereo sources? Is dual mono a "purer sound" aka less crosstalk? Going to be running OPA627BP on LittleDot 1+ using Senny Momentum 2. The sub bass regions are more well pronounced with OPA1612. 1nv). Facebook Reddit Pinterest Tumblr WhatsApp Email Hi, can I use OPA1612 as input buffer for audio application? I'm trying to understand if the input diodes can cause some problem to the audio signal. The Lounge. I know one is mono and other is stereo. 00005% AD8610 AD8620 Bandwidth Bias current CMRR Gain LM4562 LME49710 LME49720 LME49721 LME49722 LT1057 NE5532 Noise Offset voltage OPA134 OPA1612 The Audiophonics OPA1612 operational amplifier is based on an authentic Texas Instruments 1612 chip. The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. 5 ~ +36 / ±2. I've read good things about the OPA1642 in the super long CNC thread. The OPA1612 is generally used as IV stage for ESS DACs. The OPA 1642 is adopted for this circuit. These three Op-Amps sounds great. LME49720 sound is boringand too light. I have not tested the OPA1612 with high value bias resistors to see if it has the latch-up/bias current correction start-up issues of the LME49720. opa1642 is a real JFET. Then I also experience the mid range of this I can see that a lot of hobby builders tend to use the discrete solution, but I can also see that some of the high-end Op-Amps are hitting distortion and noise figures that i would think is hard to beat like the OPA1612 with its 1. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. the OPA1642 brings it a little closer to Z8 DAC performance, I figure its still a very nice piece of kit for a third of the price of some of the high-end streamers out there. 2 NVME 3. 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 The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. I seem to recall that the OPA1642 is newer than the OPA1612. They said on paper the Porsche was better in all compartments, even the stereo of the Porsche sounded better but all preferred the Jaguar because of its handling and driving feeling. “ti从1985年至今，在音频领域已耕耘超过30年，从 到转换器，我们现在在业内的市场占有率接近30%。” 中国区模拟产品市场拓展经理信本伟表示，“无论是从技术、还是市场需求角度来看，ti最近都会有更大的动作。 “比如30多年前的opa2604、2134，到后来的opa627，以及近几年的opa1612，都是口碑非常好 I like the OPA1642 due to its MUCH reduced bandwidth compared to the 1656 (11MHz vs, 55 MHz)---thus much less chance of oscillation in vintage circuits. This combination will sound slightly more clinical than the 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. But for MC phono pre-amps a low noise bipolar input op amp like the OPA1612 would give the best noise performance. Just check the rails aren't over +/-18V. The Vendor's Bazaar forum is for commercial offers and transactions. I was looking at opa1642 and opa1602 Thanks. The OPA1602 and OPA1604 series of op amps offer rail-to-rail output swing to within 600mV with 2kΩ load, which increases headroom and maximizes dynamic range. Opa2156 sounds a little more "detailed" and a little "grainy" in comparison. 80 EUR for all ten. opa1602, opa1612. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). 995,00 kr. Engineers apply the knowledge of math & science to design and manufacture maintainable systems used to solve specific problems. This device also has a high output drive capability of ±30 mA. Newest offerings from National and Linear both lost to the TI's. ounding-op-amps-lowest-thd-8. May 19, 2020 #47 Would have been interesting to see how the TI Opa1612 would have performed as well in the custom buffer board. tnt-audio. com SBOS450C –JULY 2009–REVISED AUGUST 2014 5 Pin Configuration and Functions D Package OPA1611, SOIC-8 D Package (Top View) OPA1612, SOIC-8 (Top View) DRG Package OPA1612, SON-8 (Top View) (1) NC denotes no internal connection. In terms of noise performance in the real world the OPA1612 beats the Hi Ervin, Yes those devices are very popular, unfortunately I don't have any way to know for sure when they are back in stock. But the NJM353 is FET and probably you'll be better off with the OPA1642 (which still looks superior to OPA2604 and all the rest of the FET things, excepting maybe the ADA4627-1) than with the OPA1612. Power Supply: Low noise, high quality switching power supplies. SSD: M. (It seems that Scott Wurcer is featured heavily in this design). These days the likes of OPA1642 / OPA1612 are routinely used, so I leave those alone. 000015% VS OPA1642 on the standard DMP-A6 Do you see these making a discernible improvement in the sound, and would these become largely irrelevant using as a streamer only and linking to an external DAC? Site Site Announcements Forum Problems & Feedback Terms and Rules. Now all the folks are using opa2134 op -amps as the replacement. They'll say the OPA2134 "sounds dark" for example. Best performing sample I have is a TL082CP vintage National Semiconductor by the way. The output amp could, for example, be an OPA1611 and the buffer amps OPA1612. Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. For OPA1642, the output current (limit) appears to increase with increasing temperature. So, it is a different design and chip. consists of 2 x 10 op-amps in parallel and the Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. The input device that I use is the AD797, but there are other choices that are suitable- the LT115 comes to mind. So, parts are not spec'ed for or Site Site Announcements Forum Problems & Feedback Terms and Rules. And bias current vs common-mode voltage has a slope that adds distortion (H2) when source impedance isn't super low and well balanced while OPA2156 doesn't have that problem (but may have nonlinear capacitance vs CM voltage unless the input Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. The OPA1642, however, is also LESS expensive ($2. Hi there probaly a simple question maybe not. It ensures a very low noise density of 1. OPA1656 (CMOS) on an adapter is a winner too. See the LM4562 vs Better choices include LME49720, OPA2211, AD8599, OPA1642, AD8512, OPA1612, etc. Joined Apr 3, 2018 Messages 348 Likes 138. Change Location. Just did an A/B with 2 opamp buffers on my Hypex NC500 OPA1612 is fuller sounding - especially lower midrange but also more dynamic. Is the 2134 the right choice. It's a toss up between the JFET input's higher noise vs their lower sensitivity to input AMB Laboratories DIY Audio Forums. Since CMOS parts tend to top out at a mere 5. Everything simply sounds 'real'. The single of the OPA1612 is the OPA1611. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, analytical and non-intrusive (as I've seen people use OPA1642/1644 a replacements for the NJM4580s and TL074s on these amps. It was recently re-capped and all new guts put in . 1-nV/√Hz and an extremely low distortion level of 0. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 Yes, depending on the recording it can be thin-ish, but the detail and transparency just can't be beat. The idea came more from some kind of engineering challenge rather than serious need - my O2 was probably more than enough. Hi team, The following two sets of Output Voltage vs. 1nV√Hz: 1700fA√Hz: 27V/μS +4. e. Pin can be left floating or connected to any voltage between (V–) OPA1612-Q1 Price, OPA1612-Q1 Stock, Buy OPA1612-Q1 from electronic components distributors. I no nothing about this. 0 We would like to show you a description here but the site won’t allow us. This configuration is best for use in setups with a source/DAC capable of higher pre-out voltages. But for GUITAR usage (high source impedance), the OPA1642 (also SOIC-only) is the better choice--it's an FET and will have lower noise; also FETs usually sound better to most The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. html#post6555025 that is saying that the OPA1656 is quite a bit noisier than the OPA1642 AT LOW FREQUENCIES OPA1612 is very low noise but have a rise in distortion when driving Part Number: OPA1612 Other Parts Discussed in Thread: OPA2134, , OPA1678. 2. - high levels of DC precision are generally not required by audio customers (audio equipment makers). If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. So, you try different devices and measure. The supply voltages are +/-12V and both are capable of supplying up to 1A currents. 1-nV/√Hz as well as an extremely low distortion level of 0. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. Opa1612 ( sounded almost as good as lm4562, very small difference ) 3. Source The picture shows my op-amp rolling, I have tried the ne5532, opa1612, lm4562 and opa1642. What do you think will be the opa1612 distortion now that the available amount of feedback at 1khz has lost 60db ? ••• View community ranking In the Top 1% of largest communities on Reddit. Featured Vendors OPA1612, OPA1642 and good old NE5532/5534A will do everything you ever need - perhaps not what you think you need, but perform well above human perception limits. Goggle bill d mod carver c-1. With that in mind, matching source and feedback resistance is no longer as critical to ensure good distortion performance (as can be seen in Figure 37 in the OPA1642 datasheet). Audio, Audio, Audio! Amplifiers, Phono preamp, and Analog Audio Review. ti. Archived post. OPA1612 is a great amplifier, however, it is bipolar (input type) and when used immediately at the front-end of a guitar input, the input current noise (1. TI 5532P vs ST TL02CN Inverting configuration Gain=10 Output=1VRMS across 2kΩ Load. Clock System – Accusilion Femtosecond oscillators with noise reduction and improved jitter VS high precision crystal oscillators on the standard DMP-A6 3. Replace OP amps. " but I think The OPA1612 and OPA1642, distortion is much better. Several reference are used on forum. Marketplace. 9 nV/√Hz at 10 kHz We have several very low noise audio op amps that would be good replacements for the JRC devices. I opened one SO-8 package and put it under the microscope in our workshop. if using it alone its the better choice, but if there is a buffer afterwards to drive the headphones, or you are using them for line out, I have on me LME49860 and OPA1642. Other Parts Discussed in Thread: OPA627 , OPA637 , THS4012 , LME49720 玩HiFi发烧级音响的朋友，肯定知道国半芯片,一般以LME开头。 后来被德州仪器TI收购，使得TI获得了运放的新鲜血液。这些不提，单说玩家常提到金封，塑封等名词，刚开始我也不是很懂. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. by changing the different opamps in audio gear. 6 mA of supply current per channel. Part Number: OPA1642 Other Parts Discussed in Thread: TL072 , LM833 , , OPA1656 , OPA1655 , OPA2156 I've just started working with the OPA1642A, and I want to use TI E2E support forums Search Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1612 Series Audio Amplifiers. For example the OPA1678 has a much higher gain-bandwidth product than TL072 and different output impedance, which means that the criteria for it being stable (i. It is very airy, the bass and treble regions extension pretty well and overall it has a very neutral lively tonality. The OPA1652 and OPA1654 op amps offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. 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 . You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a AudioKarma Audio Forums. I must Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 魅族mx4pro运放芯片用的是1612，而xplay 3s用2604，不知道魅族能不能比vivo更屌呢？ 貌似老外们觉得2604比较好有助攻的么 OPA1612 与 OPA2604 对比？ 1 10 100 1000 1 10 100 1k 10k 100k 1M 10M 9ROWDJH1RLVH6SHFWUDO'HQVLW\ Q9 ¥+] Frequency (Hz) C006 Product Folder Sample & Buy Technical Documents Tools & Software 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. You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc Some members in the Pass Labs forum section used my design in their First Watt clones with the same conclusion. it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. BJT-inputs without bias current cancellation (OPA1622), Super-Beta BJTs (OPA2210), Low voltage noise JFET and CMOS (OPA1642, OPA827, OPA828, OPA1656/2156). It OPA1642, or OPA1688 are good choices for a FET or CMOS op amp in this application. No doubt the OPA1642 is a fine opamp and I can imagine people like it's warmth and punch, but the OPA2828 is simply on a It's well known that all the rest being about equal, bipolar opamps will sound better (and distort less) than FET input's. Home. There are some things to watch out for when swapping op amps. 55), but in inverting mode only. Hi Community, TI!!! I would like to upgrade an audio amplifier OPA2134 and the TI site web recommands me to change for a new OPA. Mar 27, 2023 #1 (OPA1612 OP Amp), allowing for Low/Med/High gain settings via toggle switch on the rear. We made 10 units of the same, of which 5 units failed OPA 1642. I hear OPA828 is the new version of the OPA627, so I may try that one out. 3V inside of each supply. Audio, Audio, Audio! DAC8043 (or similar) in multiplying mode (see datasheet) with quality OA, eg. 25 ~ ±18: 55mA: 3. All five op amps have more than half the noise compared to the NJM4560. Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. com OPA1612, MUSES8820, OPA1692, LME49723 and the NJM8801. 25 V to ±18 V, on only 3. Opa1656 has Here’s a great article comparing opa2156 CMO vs opa1612. 5nV/√ Hz noise density with an ultralow distortion of 0. Extensive listening test showed me that the best sounding result was with the lm4562. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. Joined Feb 29 OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers 1 Features • Ultra-low noise: – Voltage noise: 2. I'm not a big fan of the OPA1642 in general and didn't like it in EQs. Manufacturer: Texas Instruments. PRODUCTION DATA. New comments cannot be posted and votes cannot I know well the opa1612 in the output stage of DAC and while it is good I prefer the sound of AD4898-2 for that application. I would tend to use the OPA1642 for buffering, filtering and EQ. 2 dB at 1 kHz, while driving a 32-Ω load at 100-mW output power. 5nv/6. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. The OPA1642, SMT-only, is also a good dual BIFET. I'm putting OPA1612 now ahead of OPA2228 and LM4562 respectively. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant presence in the sub bass region. Plus, its easy to miss some possibly interesting discussions or posts amidst all the mess. You could also consider OPA1652 as another option here. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP I talked to a TI/B-B applications engineer today. OPA1611, OPA1612 www. try the new OPA1642. OPA1642 sucks 1. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. 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). The AD opamp is more expensive though than the OPA1612. Please confirm your currency selection: Mouser Electronics - Electronic Components Distributor. 5 mA The advantages of the SiGe process used in the BUF634A are pretty obvious. Aol The diyaudio forum might be better suited for posing the question. I tried opa2189 lmh6643(stock), opa2156, opa1656, opa1612 opa1642 opa2140 etc. In that case, for example, the Sparkos SS3602 sounded very sharp, the OPA1612 oscillated like crazy, and the OPA2604 and TL072 - LMP8672 (probably discontinued) - OPA1612 (which is barely available in SOIC8 at the moment) - ADA4898-2 - OPA1656 (if the circuit around it is right, it performs like opamps which are much more expensive, because of the FET Input stage it doesn't produce so much noise even with higher resistor values on its inputs) - AD8599 ( not a OPA1612 otoh has the best sub bass performance I have heard. Do diamonds shine on the dark side of the moon? Reactions: fpitas. 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. rather fun, even if the only op I found to be sounding clearly better than ne5532, was the lm4562 ( the others I tried: opa1642 opa2134 and opa1612 ) Last edited: Oct 2, 2021. however I cannot source an OPA164x at the moment, seems He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. 8mA per The Vendor's Bazaar forum is for commercial offers and transactions. Contact Mouser (USA) (800) 346-6873 | Feedback. And of course the There's no shortage of candidates here, and the new OPA1656 is a great option, but you could also check out: OPA1642, OPA1678, OPA827, and the newer OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. 000015%: OPA164: OPA1642. how about the sound of opa1612? Can't really comment on the 5532 vs your discrete as all the details are unknown. These devices operate over a very wide supply range of ±2. Vendor's Bazaar. Some seem to like it used in combo with he OPA1612. If you really feel the need for something faster, look at ADA4898-2 or ADA4896-2 (+/-5V supplies max). I agree about the OPA1612 for gain. Internet Culture (Viral) Amazing; A Phone that has ES9018K2M DAC and an OPA1612 Op-amp? While beating the note 4 in specs?? WTF? engadget. Part Number: OPA2210 Other Parts Discussed in Thread: LM4562, , INA1620, OPA1622, OPA1656, OPA828, OPA1642, OPA1678, OPA1612, BUF634A Pardon if any of the following has been covered. I couldn't tell the difference between the Topping and the 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. Audio, Audio, Audio! 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. Member Areas. Since the OPA1642/1641 Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. 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. opa1642 and opa1656 as I can in a small headphones amp design. OPA1656: High-Performance Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. 7vn, not the old 4560 though Will the forum updated. The OPA1662 and OPA1664 series of op amps offer rail-to-rail output swing to within 600 mV with 2-kΩ load, which increases headroom and maximizes dynamic range. Forum Donor. Be sure to include the AD746, the OPA2209, and the ADA4898-2 (mounted on SOIC-to-DIP adapters) in your rotation. 0000x distortion and so on). Featured Vendors I don't like the sound of opa1642. You can use almost any good op-amp. Just measured a couple of examples to illustrate your argument. The OPA1612 op amp is The Vendor's Bazaar forum is for commercial offers and transactions. The OPA1642, The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. Reason: Added link Access to members-only sub forum discussions; We would like to show you a description here but the site won’t allow us. My designs considerations were pretty simple: Challenge myself and OPA1622 SoundPlus High-Fidelity, Bipolar-Input, Audio Operational Lead finish/ OPA2192 being my favorite CMOS opamp and OPA2209 my favorite bipolar alongside OPA1612. 18 The Vendor's Bazaar forum is for commercial offers and transactions. Tilbud Rega Aethos – DEMO MODEL 32. This op amps offer rail-to-rail output swing to within 200 mV of the power supplies with a 2-kΩ load, which increases headroom and maximizes dynamic range. At least it is my preference when associated with an AK-449x DAC. JFET-Input Audio Op Amps OPA1642 TI E2E™ forums with technical support from opa1642跟lm4562比较 ： lm4562声场是丰满 ，定位不如opa1642 ，脱箱感比较强是opa2604。 lm4562低频量感很足，弥漫整个空间，opa1642就是直白风格，低频不如lm4562和opa2604 lm4562解释力超高，细节非常丰富，如果用在不好的系统，可能会出现偏高频的情况。 Their new Pure Multichannel amplifier is just beautiful! From 7 up to 12 channels of Purifi 1ET400A amps, LT3045/LT3094 regulators, OPA1612 or Sonic Imagery 994 opamps. Ne5532 then the opa1642 was the winner. THD+N vs Frequency (2-k Ω Load) OPA1677 , OPA1678 , OPA1679 SBOS855E – JANUARY 2017 – REVISED DECEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. I think lmh6643 and Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects. Low end: NJM2068 NJM2114 I'm thinking OPA1642 or NJM2068 at the input and OPA1612 or OPA1642 at the output could be an awesome setup. OPA Chips – OPA1612 with ultra-low noise and low distortion 1KHz 0. 1-nV/√ Hz noise density with an ultralow distortion of 0. So circuits with low C and high L (traces) have lower damping, whereas circuits with low L (power/ground planes) make it much easier to 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. 7 EUR at Mouser. 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. Joined Sep 4, 2021 Messages 9,115 Likes 15,621 Location UK/Cheshire. Datasheet: 764Kb/21P. At a gain of 60dB, the THAT is only down to -82dB. 00006% at 1 kHz. dkdscmopkhkfwtpglafyieanesksocubnttbrslvfjjc