This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages. However some manufactures (eg, NAD 3150) went for +/-18. Now, we run through a hand calculation to find the total noise of a simplified audio system. This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages. Dec 27, 2019 · Dec 27, 2019. 18 hours ago · Search: Opa1612 Review. Thread starter oldphaser; Start date Jan 10, 2016; oldphaser Chief Journeyman. Differential amplifier stage has a gain of 0. OPA1612 is very good, but expensive and available in SOIC only. Running higher signal voltages through OPA1656 or 1612, for eg. Jan 24, 2016 · With a 2K Rsource the OPA1612 and NJM2068 have similar noise signatures. Now, we run through a hand calculation to find the total noise of a simplified audio system. Sound is more "color", and "massive". 2022-05-20 10:23 am. Opa1612 is generally slightly light weighted but very balanced otherwise. OPA1612 otoh has the best sub bass performance I have heard. I'm not a fan of Op-amps, but if you're faced with no other option, the Burson V5i is perfect. 100% of my limited supply of LME49860 and LME49720 over several different dates codes have burst noise in high gain circuits. This circuit can keep the sound quality natural and smooth when playing at a. lm358, mcp602, lm2904m, ne5532, opa2228, opa2134 and opa2604 Brief Description bought a few month ago some OPA2604; they were really, really, really bad (in any case on these Sabre-boards) 191: Re: LM6172 vs OPA2134 vs OPA2604 (4 When designing the Burson V5i, our goal was to create a product that was to manage When designing the Burson V5i. 3X gain). OPA2134 has good tone and detail when in single mono mode ie with two op amps one per channel. All Activity. Fast forward to today and we have the Supreme Sound V5 and V5i Opamps. 186 ชิ้น. OPA 627 sind. This entry was posted on Wednesday January 3rd, 2007 at 10:19 PM and is filed under Tweaks. The B4-X is the most expensive though, at about a 40% premium over the basic B4. OPA1612 is one the most low-noise opamps . It can also be used to replace other dual op-amps, such as those found in the TL072, NE5532, and OPA2134. Ne5532 Vs Opa1612. OPA1612 is open sounding but is a little warmer possibly because of the lower midrange roundness. Thread starter oldphaser; Start date Jan 10, 2016; oldphaser Chief Journeyman. I must test muses now. 5 V to 36 V) on 3. OPA1612; Panasonic DMP BDT 385 / playing finally. Topping D30 and SMSL M8A, and built in AKM are no game to Bifrost in terms of details - at half or less the price, it is not a fair comparison If the sound quality is an improvement over the Topping D50 then I'd be tempted Free International Shipping Dac Smsl SU-8 vs Topping D50 I want something that doesn't fuck up the sound (aka plays it as it is but. 1 DC interface and wire socket). · Search: Opa1612 Review. Adopts NE5532 front chip for for better performance. 4 Calculating Voltage Noise at the Output. including the deservedly revered OPA627, a pair of which was much better than LM4562 (same. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant presence in the sub bass region. Thanks for that recommendation. 64 GBP / €7,06 one off from RS. Running higher signal voltages through OPA1656 or 1612, for eg. newer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. With OPA1632 both channels show equally low -116 dBV (non-weighted) noise while with LME49724 there is some variation in one channel. The OPA1612 does have a higher maximum Ib. Running higher signal voltages through OPA1656 or 1612, for eg. Cancel; 0 ROD over 12 years ago. I must test muses now. 18 hours ago · Search: Opa1612 Review. I'm not a fan of Op-amps, but if you're faced with no other option, the Burson V5i is perfect. This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages. lm358, mcp602, lm2904m, ne5532, opa2228, opa2134 and opa2604. Search: Opa1612 Review. This is also AKM's recommended opamp in many AKM DAC's in both IV and LPF stages. A quick snapshot of the OPA1656 performance specs: 2. This video title is; 2Which OpAmp is Better for 20W Class A Amplifier . NE5532, e. NE5532AN vs NE5532N. 39 NJM2068 in the O2’s gain stage. Running higher signal voltages through OPA1656 or 1612, for eg. 65 NE5532 except by a few dB in noise performance. NE5532 it is a very good opamp. Through research and over-engineering, we turn unconventional approaches into design benchmarks, And we thank all the like-minded audiophiles who appreciate our approach and witness. Inputs will be balanced or unbalanced line level,. 그러고도 모자라 이젠 OPamp DAC를 손본기 시작해 오늘은 NE5532대신 오스트렐리아 OPamp인 V5i-D를 장착 했습니다. If possible, you could try all of the three op-amps from above without getting worried to get oscillations. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant presence in the sub bass region. OPA1611 vs OPA134 or OPA1612 vs OPA2134. Results: 4. Op-Amp Test Board Schematic The circuit board has decoupling capacitor C1,C3,C2, and C4 very close to the op-amp so that it can achieve it's best noise performance. Each of the op-amps listed below are certified to work on the NU Audio Pro cards. So far I don't hear any harsh sibilants (very clean) but it is virtue of my speakers. newer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. · NE5532 is very flat and even sounding but is no comparison to OPA1612. For I/V: OPA1692 is best, compared to - OPA1612, OPA2192, OPA2209, OPA1652, NE5532, LME9720, OPA1622, OPA1602, OPA1662 For LP: OPA1692 for now, I have good expectations from OPA2209 but they are out of stock. # 2. The only drawback it's the input stage which is on bipolars. I don't like the highs of OPA1612 though, they sound artificial to me. OPA1622 Dual OPA DIP8 (Unit) This OPA1622 is ideal for the replacement of any OP NE5532, OPA2134 DIP8 compatible amplifier, An excellent stereo AOP, dynamic, straight, affordable, which will find its place notably in the output of DAC and headphone amplifier. 10 for the NE5532 than $3~$4 for the . OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. com/product/OPA1642, the OPA1642 can be used fully diferential (balanced) to a studio monitor or amp, just like the OPA2134, but which has a better sound quality? the OPA1642 is in a Roland Mobile UA USB interface ( https://www. Distortion will strongly depend on load it drives. 2022. # 2. In other words, NE5532 might be used in place of JRC4558. It is very pleasant. 2 per channel with a OPA1612 op amp, the author more than a bit of 96-inch OLED display But it's already superior to most ordinary preamps Also, a "classic" OPA1612 buffer was used Automotive, 1 Automotive, 1. About Ne5532 Vs Opa2604. 20 for OPA1632. NE5532 Op-Amp Pinout, Datasheet, Features & Alternatives. opa1612 vs lm4562, lt1469, lt1364, opa1612, opa2211 bランク ad8066, lm4562, lme49720, ne5532, muses02, muses8820,. 2022: Author: harley. NE5532AN vs NE5532NG. OPA1632 measures slightly better in isolated tests but it does not give measurable difference on H-DAC as LME49724 is already good enough, the DAC chip probably being the weakest link. NE5532AN vs TLE2024BCDW. About Ne5532 Vs Opa2604. Total Noise of OPA1656 vs OPA1612. FWIW, I'd suggest OPA827 (x2) or OPA1641/42 for TL072 and OPA211/2211A for NE5532. OPA2228 NE5532 I am trying these chips in different combos. 0 to 20 V Compensated for Unity Gain Pb−Free Packages are Available OPA2604 VS NE5532 Pinout. But it's already superior to most ordinary preamps The D70 is a very good example to have both good measurements and enjoyable sound But if you simply use op amps It would have been nice to see how the OPA1612 and OPA1642 measure up but they only come in Very content with the Rothwell attenuators : no impact on sound quality and very nice build quality Il D50s è. THD+N level vs. Tuesday, January 28, 2020 2:47 PM ( permalink ) Our friends at Audio Note did some extensive listening testing with the NU Audio Pro before launch and compiled a list of Op-amps they tested. # 2. Thanks for that recommendation. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). พวก opa627 opa2134 muse01/02 muses8820 muses8920 lme49720 ne5532/34. This is especially true if you’re concerned about power consumption for battery operation. In case used CD player OPA2134 is clearly best of four. Because anything better is overkill and not cost-effective, a lot of new audio. 10 Nis 2019. Hi guys, I've decided to replace the stock opamps of my Onkyo SE90. The B4-X is the most expensive though, at about a 40% premium over the basic B4. OPA2228 NE5532 I am trying these chips in different combos. noise, bandwidth, THD and output current. com/product/OPA1642, the OPA1642 can be used fully diferential (balanced) to a studio monitor or amp, just like the OPA2134, but which has a better sound quality? the OPA1642 is in a Roland Mobile UA USB interface ( https://www. Mais prenons simplement un AOP comme le NE5532. This board is a software-controlled version of W-DAC 4493, plus a few tricks added to improve it's practical performance and usability especially in preamplifier applications. Hard to tell from their messy website I have the dac smsl m300 mk2 for 5 weeks I will share my experience with you with this dac (my setup is smsl m300 mk2 + smsl sp200 + akg k712 pro): 1- I have no noise by connecting this dac to my pc via the View and Download SMSL SA-50 plus manual online 1x Power Supply Ne5532 Vs Opa1612 Ne5532 Vs Opa1612. Il D50s è equipaggiato con amplificatori operazionali OPA1612 SoundPlus ed un TI LME49720, a comporre il filtro passa-basso ACTIVO CT10 Hi-Res Portable Music Player Toppin D50 comes with the OPA1612 that supports the sound plus of high-performance audio D50 use XMOS(XU208) + 2 x ES9038Q2M +3 x OPA1612 for DAC, in. OPA1612 is bipolar input opamp. Quality single to dual op amp with free worldwide shipping. 15" IPS LCD 10-Finger Touch Display, Dual AK4499EQ DACs, 768 kHz/32-bit and DSD512 Playback, Hi-Res Audio & MQA 8x Playback, USB DAC, Dual-Band Wi-Fi & Bluetooth, 2 TOPPING D50S Bluetooth DAC ES9038Q2M MINI AUDIO Decoding USB DAC XMOS XU208 DSD512 32Bit / 768Khz OPA1612 USB/OPT/COAX input $249 I may offer OPA1612 option later if there is demand Automotive, 1 Any decent. · Search: Opa1612 Review. By newer I meant. Because anything better is overkill and not cost-effective, a lot of new audio. OPA1612 otoh has the best sub bass performance I have heard. 3X gain). New circuit techniques and special laser trimming of. Decoding analog low-pass filter circuit is also very important, H2 I guess that only means that people find this page helpful OPA 2134 is good, and (even if I don't really like ICs for audio in general) way "better" sounding than the NE5532 if I may say In SMT the OPA1612, rated at 40V absolute maximum, is a very good part TOPPING D50S. Most Opamps labeled ne5532 are Actually not NE5532. Topping D50 vs SMSL SU-8 vs Denafrips ARES I Vincent Audio SV237 Troels Gravesen SBA 941 First part is Topping D50 The Topping D50s is tiny and brilliant! I accidentally refer to the Audiofly Dragonfly Cobalt in this review. OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. AD8066 AD823 AD826 AD827 AD8397 AD8599 AD8610 AD8620 Bandwidth Bias current CMRR Gain LM4562 LME49710 LME49720 LME49721 LME49722 LT1057 NE5532 Noise Offset voltage OPA134 OPA1612 OPA1642 OPA2111. It is listed for the TI part (OPA1632 and OPA1612) but not for the former National parts. OPA1612 is bipolar input opamp. newer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. The overall sound balance is quite neutral, and detail is very good but not extreme. Mar 7, 2008 · They are the generic NE5532. NE5532, e. Search: Opa1612 Review. High quality and stable for audio output. Results: 4. I can't really hear difference this time. The OPA2134 is more a better replacement for the TL072 when you need a FET type. The one thing that the V6 Vivid lacks is the meat at the lower frequency. If possible, you could try all of the three op-amps from above without getting worried to get oscillations. At gains of 5X and higher nothing could beat the $0. db; yg. 100% of my limited supply of LME49860 and LME49720 over several different dates codes have burst noise in high gain circuits. Dual FET-Input, Low Distortion OPERATIONAL AMPLIFIER 14 in) the V6 are the smallest discrete op-amps in the world In addition, it's generally a good idea to use slightly more generous decoupling caps with the OPA 627/637, so the 637 might not be a suitable replacement in a pinch However, when looking for a frequency. item 1 DUAL Channels HDAM Full Discrete Op Amp Module replace SS3602 OPA1612 LME49720 DUAL Channels HDAM Full Discrete Op Amp Module. The OPAx132 is the slightly better version for DC critical applications. • High Open-Loop Gain: 130 dB. So far, my favorite combo is the 2228 in the input (U1) and the 2134 in the output buffer (U3, U4). The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. Re: Q: (better) alternative for OPA627 ? The Analog Devices ADA4627 is essentially a second source version of the OPA627. OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. 17 Nis 2021. I would suggest a single dual-opamp the OPA2134. It is. The sub bass regions are more well pronounced with OPA1612. Lives for gear. com/product/OPA2134 OR http://www. This entry was posted on Wednesday January 3rd, 2007 at 10:19 PM and is filed under Tweaks. NE5532 is a very good amplifier especially for. 가도가도 끝이없는 해상력의 끝은 어디인지 도저히 모르겠습니다. 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). Ne5532 Vs Opa1612. NE5532AN vs NE5532NG. You must log in or register to reply here. OPA2134 Vs NE5532. newer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. 35MM出力 バランス入力 AMP 3ステップゲイン設定 ヘッドフォンアンプ (シルバー) ブランド: Topping 5つ星のうち4. 18 hours ago · Search: Opa1612 Review. Pin can be left floating or connected to any voltage between (V–) and (V+). I'm looking for a replacement for the NE5532 (dual opamp), which can handle +/-18Volt. Share Reply Quote. # 2. I must test muses now. All Activity. For FET, I've found the AD825 sounds quite nice - better than OPA2134 and OPA2604; the OPA827 has also. For FET, I've found the AD825 sounds quite nice - better than OPA2134 and OPA2604; the OPA827 has also. For the dual op-amps you can see one of the op-amps is configured for inverting 6dB gain with 10k and 4. Total Noise of OPA1656 vs OPA1612. The 2134 in all three positions is also nice and pleasant, but missing a bit of realism. So far, my favorite combo is the 2228 in the input (U1) and the 2134 in the output buffer (U3, U4). 66 for LME49724 and £4. It is actually best to test them in the circuit. If the voltage range is larger, more than 18V, then the 2604 is better. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant presence in the sub bass region. dotneck335 said: An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. bipolar in the NE5532) there may some perceivable performance differences. One other very noteworthy difference is the Vivid has a strong attack, but loses a bit on the decay so sustain is better on the SS360x. Łącząc w sobie wysokiej klasy komponenty, stanowi doskonałe wzbogacenie każdego systemu audio Hi-Fi o konwerter cyfrowo-analogowy, odtwarzający pliki dźwiękowe zarówno ze wspaniałą. 1mV: 60000pA: 114dB: 40MHz:. The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. 5-millimeter jack for pairing with balanced IEMs Added short reviews of the AD8512 and NE5532 Opa1612_fake&Orig_dwn Very content with the Rothwell attenuators : no impact on sound quality and very nice build quality 1ET400A is a single-channel, ultra-high performance, analog-input Class D amplifier module capable of over 400W of power and. venator shard osrs, excel vba send email outlook web access
This will drive easily a signal to a power amplifier. . Opa1612 vs ne5532
Burson V5iD chính hãng. 65 NE5532 except by a few dB in noise performance. Total Noise of OPA1656 vs OPA1612. 0 V into 330 Ω. Also, SS V5 and SS V6 has the same harmonics as NE5532 and LME49720 when used in I/V of my ASUS Essence One (MUSES01 instead has higher 2nd and 3rd harmonics). This video title is; 2Which OpAmp is Better for 20W Class A Amplifier . Because anything better is overkill and not cost-effective, a lot of new audio. Bottom line, check the supply voltages, pin 4 and 8. Haven't tried the new OPA164x series, but word is that they sound good. Log In My Account se. Moreover, OPA1632 costs significantly more; at the time of writing, prices (no VAT) for single quantities at Mouser are £2. Sound is more "color", and "massive". much better than old chips like the NE5532 and TL072. Jul 4, 2009 · OPA1612 is relatively new opamp and is widely used in several medium-priced but also high-priced DACs. This has become a good choice for an all around opamp. So they may not be as expensive as they appear to be. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. · About Vs Ne5532 Opa2604. I am using these chips for ultra low distortion audio range sine oscillators manufacturing. Ne5532 Vs Opa1612. 1 day ago · Search: Opa1612 Review. Find many great new & used options and get the best deals for Dual Channels Full Discrete Op Amp Module Replace Ne5532 Mus02 Opa2604 Lme49720 at the best online prices at eBay! Free shipping for many products!. opa1612 opa1656($3) have thd performance better than -140db. Below are THD+N vs. 1-nV/√Hz as well Opa1612_fake&Orig_dwn Use XMOS XU208 + 2 x AK4493 + OPA1612 to support USB input up to 32bit 768kHz PCM decoding and DSD512 native decoding Reviews (2) The BrownDog™ 060301 is an SO8 (SOIC-8) or 8 pin DIP to single-inline SIL/SIP adapter Download a datasheet or document on TIs OPA1612. The sub bass regions are more well pronounced with OPA1612. We further grow as an "Analog solution provider". 14in) high it is the smallest discrete type op-amp in the world. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. I don't like the highs of OPA1612 though, they sound artificial to me. This gives a very fast, detailed, and involving sound. Although many people dismiss the NE5532 as an obsolete component and try to locate a replacement, the NE5532 is still adequate for most applications. Opa1612 is generally slightly light weighted but very balanced otherwise. You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a DIP8 socket. The NE5532 also has 8 legs but is less than half the size. May 15, 2022 · 2022-05-20 10:23 am. 65 NE5532 except by a few dB in noise performance. LME49720 sound is boringand too light. Search: Opa1612 Review. Search: Smsl M300 Vs Topping D50s. Where the highs were slightly energetic on the V5, they sound more resolving on the V6 Vivid. 0 SU6 Desktop Mini Audio DAC with Remote Control. Nisshinbo Micro Devices Inc. com Community. OPA2134 Vs NE5532 - Electronic Projects Design/Ideas - Electronics-Lab. Likes: 633. My YouTube Review Channel (Check it out and subscribe!) Decoding analog low-pass filter circuit is also very important, H2 VTV Amplifier Custom Hypex Input Buffer made for the Hypex NC500, NC1200 and NC2K 22 votes, 24 comments 5mm 4極バランス) ：320mW (16Ω負荷時)、200mW (32Ω負荷時) ライン出力レベル：1 We now measure and review equipment for free!. NE5532, NE5532A, SA5532, SA5532A www. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. I may offer OPA1612 option later if there is demand They are paired with dual independent crystal oscillators, multiple OPA1612 operational amplifiers, all of these combine together and tuned by professional acoustic engineers I will surely look at OPA2228/2823, my other option was Podaj jak najwięcej informacji o przedmiocie 173-29-459, Wzmacniacz operacyjny Dual 40. lm358, mcp602, lm2904m, ne5532, opa2228, opa2134 and opa2604 Brief Description bought a few month ago some OPA2604; they were really, really, really bad (in any case on these Sabre-boards) 191: Re: LM6172 vs OPA2134 vs OPA2604 (4 When designing the Burson V5i, our goal was to create a product that was to manage When designing the Burson V5i. In SMT the OPA1612, rated at 40V absolute maximum, is a very good part and i think my opa1612 is bad It ensures a very low noise density of 1 Have enough experience enthusiasts know, DAC chip is only a machine foundation, the most critical is the external circuit design and adjustment, in order to achieve the use of ES9038pro and get treplay effect, Melokin. In other words, NE5532 might be used in place of JRC4558. lme49720这个双运放和ne5532一样具有内补偿功能吗 - ： 是的,它们都是内补偿运放. amplitude and THD+N vs. They feature very low noise, high output-drive capability, high unity-gain and. You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a DIP8 socket. Running higher signal voltages through OPA1656 or 1612, for eg. This may be the case with low frequency filters. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. May 23, 2018 · Funny thing, SS V5 used in the gain stage of my Objective2 has lower noise than the original NJM2068 and the same 2nd and 3rd harmonics (3. OPA1612 is one the most low-noise opamps . 2022-05-20 10:23 am. You could probably drop in a '4580 and be 99% there. Mar 7, 2008 · They are the generic NE5532. For gain: OPA209 but only against NE5534 and V6V singles. 2W is plenty of power, and will fill my garage with music well enough, bu. This gives a very fast, detailed, and involving sound. 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. Normally, that's not newsworthy because higher performing parts are coming out all the time. The Supreme Sound Opamp (SS Opamp) is a specialized, single-purpose opamp for high quality analogue audio amplification. Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution Have enough experience enthusiasts know, DAC chip is only a machine foundation, the most critical is the external circuit design and adjustment, in order to achieve the use of ES9038pro and get treplay effect, Melokin uncompromising around Circuit. Will be trying these in gain stage: OPA1611, ADA4610-1, OPA189. Now i tested opa1612 with lme49720 and 1612 is better in my opinion. Search: Opa1612 Review; ⑧ USB mode selection switch: When the switch is set to 1 TI’s OPA1642 is a Dual sound-plus high-performance, JFET-input audio op amps So correct me if I am wrong the output is 1 Vrms in HiFi mode From my experience these older OP/ OPA op amps all sound vaious degrees of "not-that-great" (cloudy, lacking details, taking away. frequency plots. Will be trying these in gain stage: OPA1611, ADA4610-1, OPA189. 9 + Shipping: US $1. Joined Sep 8, 2012 Messages 845. Đầu giải mã DAC SMSL Audio M3; 2. Differential amplifier stage has a gain of 0. Other Parts Discussed in Thread: NE5532, OPA2134, LM4562, TPA6120A2, OPA1652, OPA1612, OPA1662-Q1, OPA1622, OPA1688, OPA627. The advantage of the OPA1612 in my experience is that you don't have to throw 20% or more of them away due to noise. May 15, 2022 · 2022-05-20 10:23 am. If you have NE5532 after the volume potentiometer, than exchange it with OPA2134 •••. Its design and operation reflect and evolve a proven circuit architecture recognized for its efficiency. The OPA2134 is more a better replacement for the TL072 when you need a FET type. For gain: OPA209 but only against NE5534 and V6V singles. 35MM出力 バランス入力 AMP 3ステップゲイン設定 ヘッドフォンアンプ (シルバー) ブランド: Topping 5つ星のうち4. LME49720 sound is boringand too light. Where the highs were slightly energetic on the V5, they sound more resolving on the V6 Vivid. If possible, you could try all of the three op-amps from above without getting worried to get oscillations. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. Lives for gear. The OPA 627 is well over price and is bass heavy and it’s not worth the price you pay for it. Note the size difference between the two units. . women humping a man