Opa1656 review. 35MM Output Balanced Input Amplifier (Silver) Brand: TOPPING 4. 6 fa/rtHz broadband current noise. It has the most stable input capacitance vs. Feb 7, 2021 · Topping A30 Pro NFCA Headphone Amplifier OPA1656 4PIN XLR 4. Jun 20, 2023 · But no matter if they are original or not. May 2, 2020 · There are many reviews of audio hardware and expert members to help answer your Group Buy finished amp + Buffer OPA1656 : free shipping to Europe. Two identical gain 11 amplifiers were tested. I will measure the A07 output power and spectrum cleanliness with this power supply. Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. So I suggest just getting opa1656 and enjoy music. OPA1656 TI Design started 2017, preliminary datasheet posted March 2019. Mar 27, 2019 · OPA1656 / OPA1612 / Burson V5i / OPA627 / Genuine NE5532 / Genuine Muse 02 / 0PA1622 / OPA1642 / OPA1602 The question of Op amps has already been debated on DIY audio, and I had used the OPA1656 and I think the opinions are unanimous, these Op amps are very good and seem to work the best with those amps. 4Vp-p output. OPA1656 1/2 OPA1656 Input Output Pad Product Folder Order Now Technical Documents Tools & Software Support & Community 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. Composite amplifier is one of the best application with opa1656. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. To date, bipolar opamps have ruled when Apr 18, 2021 · Technical parameters Hel 2 uses the AKM AK4490 D/A converter with TI OPA1656 based filter stage and an output with 4 amp stages per channel. Not only was that affordable, I could trust that the op-amps would be legitimate. Mar 17, 2018 · Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. My history with Burson Jul 4, 2009 · I'm gonna get the 1656 samples next week and have my surface mounting friend get them on dip adapters. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. 5A. 5Vrms signal, 80-kHz measurement bandwidth. 5mm Mini Desktop Amp with HiFi OPA1656 Op-Amp Chip Aux Stereo for 16-300 Ohm Headphones Two-Stage Bass Gain Switch Alluminum Alloy at Amazon. Apr 21, 2019 · Sound: For purposes of these tests, I started out with a Burson Swing and Fun DAC and amplifier. Audiophonics is proud to present the OPA1656 based on a genuine Texas Instrument chip. Aug 15, 2024 · The quarter-inch headphone socket on the front panel is, according to Schiit, “Booster based on OPA1656, 150mW typical max output”. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. 5V inside of the positive rail . com. 5 out of 5 stars 46 ratings Jul 4, 2009 · In my particular amp, opa1692 has narrower sound stage than opa1656, as 1692 is designed for portbable use with trade-off (low power draw). 35MM Output Balanced Input Amplifier AI-generated from the text of customer reviews. 5amp power supply. It's a jack of all trades so to speak, and this is the op-amp I was able to compare and contrast the V6 Classic to. Read honest and unbiased product reviews from our users. There are many dual opamps to choose from. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety This OPA1656 OPA from Texas Instrument offers very good performances for audio use. Jun 29, 2021 · TOPPING DX7 Pro のオペアンプを交換し、組み合わせを試し、理想の音質へ近づけました。LFP × AMP①MUSES01 × LME49720②MUSES01 × LME49722③LME49722 × LME49722④MUSES01 × LME49990⑤MUSES01 × OPA1656⑥THS4651 × LME49990⑦THS4651 × OPA1656MUSES01は前記事にも書きましたが、最初に聴いたときは美音が衝撃的でした。相手となる The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. I had no oscillations or instability with the OPA1656. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). 5V to 36V) on 3. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. Though I use it only occasionally mostly for tests, and it has not operated more than a couple of hours summed, the right channel started to emit high frequency hiss noise time after time, without any special reason, even if nothing is connected to the input. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. He suggested to buy the parts direct from TI. Transparency got way better. Mar 17, 2019 · I purchased 10 OPA1656's. PRODUCTION DATA. 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 using OPA1656 for first 2 stages and LM4562 for stage 3 & 4: 5. It's best use as an alternative to opa1612 when noise is not a big concern. Dec 6, 2018 · Replacing the part with a more modern device could risk messing it up and ruining the performance so lose, lose. LME47920, LM4562, OPA2134, OPA2132 DIP8 opamps, or SOIC8 on adapters like OPA1656, OPA1678. Aug 21, 2024 · Headphone Stage: Booster based on OPA1656, 150mW typical max output Volume Control : relay-switched stepped attenuator with discrete thin-film 0. Oct 22, 2020 · VS AIYIMA A04 (black PCB Tilear 2. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. I have the Opa1656 and it’s fantastic! I’m dying to try the Opa1692 as I’ve heard it’s nice sounding and more importantly great in the voltage stage of your rig. But more importantly, it's CMOS. 9mA of supply current. Only companies. 1 with OPA1656) - concerning the overall listening, I think that we are rather on amps of the same range, I found the 3E Audio a little less "alive" than my AIYIMA but I think that the OPA1656 are there for something (I did not test the 3E Audio + OPA1656). Aol for the OPA2134 with a 600 ohm load has an output swing that is 2. Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. Jul 4, 2009 · I agree with you on opa1692 being too narrow compared to the Opa1656. 4MM 6. It has a very good dynamic range and a low level of harmonic distortion. I think it's a matter of circuit design and implementation. On the α24, this is a non-issue. I cannot recommend a 48V power supply because of the A07 internal temperature with the 48V PSU, in case I opa1655 , opa1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Find helpful customer reviews and review ratings for Fosi Audio N3 Portable Bluetooth Headphone Amplifier Receiver 3. OPA1656 The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Coupled with an Alps RK09 potentiometer, high-quality filter and amp stages from Texas Instruments, a sophisticated bipolar +/-12V supply, and precision thin-film resistors and film capacitors, Hel 2 delivers amazing performance for its price. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 1 is now ready with OPA1656 in DIP8 socket. Mar 17, 2019 · The OPA1641 would be slightly better. The idea of this group buy is to propose a full pack @fair price for a brand new Purifi Buffer : SPEC : - THD: 0,00026% @ Vin 2,5 V RMS - GAIN: 14 dB - BANDWIDTH: 2 Hz - 150 kHz - SLEW RATE: 24 V/uS - CMRR Apr 29, 2024 · Test protocol: Audio Analyser 1 : APx555 + Passive filter (Aux-0025) Default filter : AES17 20Khz. And the high output current capacity makes it suitable for much more applications. There are many reviews of audio hardware and expert members to help answer your questions. I'm Jun 20, 2023 · When I first got my A07, i fell down the opamp rabbithole. Jan 26, 2023 · I try all five opa1656 but the best sounding was using 2 opa1656 at the front and 1 opa1656 in the back, in the middle 2 opa2604 Opa1656 is the best I tried for Aiyima07 not Pro, the 2604 in that model meehhh Feb 10, 2020 · And I've tried many Opamps as well: the stock 5532, some directly purchased from TI 5532P and 5532AP, LME47920, LM4562 and finally some OPA1656 and OPA1612 on adapters. Feb 7, 2021 · Amazon. Sep 27, 2019 · Texas Instruments' OPA1656 Burr-Brown op amp is designed for audio and industrial applications where maintaining signal fidelity is crucial. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Jun 3, 2021 · My benchmark standard op-amp is the OPA1656 which is not the widest sounding, but it's tight, somewhat linear and has a good balance to the sound. I don't care about listening tests or something else, just want to use the technical better one in my amp. 3V inside of each supply. An infra-red remote control is also part of the deal. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. But I would still like to see the OPA1656 tested. May 2, 2020 · Best price in Europe = Audiophonics = 1500 euros without OPA1656 ) My price : 999 euros with OPA1656 if I sell at least 4 units. Feb 23, 2019 · This is a set of measurements of 19+20kHz IMD distortion of the following opamps: AD4627, ADA4898, AD8597, OPA140, OPA141, OPA1641, OPA209, OPA1611, OPA637, NE5534. 00006%. 5kHz (aggressive I know, but it sounded good to me and made a big difference with the noise) the The OPA2156 is a new, high-performance op-amp from TI. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. Every amp. -131 dB THD+N at 1kHz, 600 ohm load, 3. 5% resistors, 64 1dB steps Power Supply : Wall wart, 24VAC/6VAC, internal +45V/-28V and 5V/3. Ha ha it's funny because I'm a wide and far reached detailed and accurate fanboy and some people find too many details to be annoying. The Opa1656 has a much wider and better soundstage. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. 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. Opa1656 has good phase response at high frequency. I did an A/B comparison to LME47920 (metal cans), burson V5i, V6 and also the Sparkos Pro discrete op-amps on one of my DAC's. Jan 7, 2021 · I have ordered Mean Well RS-100-24 SMPS power supply, 24V/4. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, analytical and non-intrusive (as compared to the bold NE5532) is what I would describe this opamp as. Historically, we utilized the OPA1612, but transitioned to the OPA1656 due to its slightly superior measurements and preferred auditory qualities reported by some users. Soundstage and placement felt more solid. Normally, that's not newsworthy because higher performing parts are coming out all the time. Amplifier: Bamboo V2 3E Audio 260-2-29A Stéréo REB B (OPA1656) Nov 30, 2021 · For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. Apr 29, 2024 · WANTED: Happy members who like to discuss audio and other topics related to our interest. there is also much talk about the NE5532 being fake also and i ended up going to OPA1656 on DIP8 sockets im not a expert but i feel it sounded better with my ELAC debut b6. The cost is about $30 in a local store. I used 10 or 12 in my preamp rolling project - never a problem with Sep 14, 2021 · Yes, the low pipe organ pedal notes down 'round 20Hz are rolled-off at 20dB/decade below that of the mid-band 1KHz level during the cutter/mastering process. But this time it's a bit more interesting. This feature accommodates the power supply constraints of many types of audio products. Just learned how to fix my Jun 27, 2021 · This particular implementation utilizes 10 pcs of OPA1656 op-amps. Tried putting in opa1612 today. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. *****!!! ROLL THE OPAMPS !!! Reviewed in the United States on July 6, 2021 Size: A07+DC 32V Power AdapterVerified Purchase A pair of *genuine* OPA1656's is the consummate and necessary upgrade for it's stock NE5532 opamps. >100mA output current. Measured at non-inverting gain 40dB and 3. Again, from known dealers or vendor like Digikey or Mouser, not Ebay or Aliexpress. 9nV/rtHz broadband voltage noise. CMRR is not a big issue. in order to resurrect those signals the preamp applies a maximum gain of 1000 b/c the basic mid-band gain must be ~ x100. com: Topping A30 Pro NFCA Headphone Amplifier OPA1656 4PIN XLR 4. 3uVの超低ノイズと145dBの高ダイナミックレンジを実現します。 Topping A30 Proの特徴 Dec 9, 2019 · Home: RME ADI-2 Pro FS R BE—Neumann KH80 DSP, Arendal Sound 1723 1S Work from Home: JDS Labs Atom—Etymotic ER4SR, AKG K371, Sennheiser HD820 Measurement: Earthworks M30 (Reed R8090)—Earthworks ZDT 1021 — RME ADI-2 Pro FS R BE — REW May 2, 2020 · Hi amigos, New Purifi Buffer in V2. Review. We would like to show you a description here but the site won’t allow us. I prefer the opa2211 over the opa1612 (same chip but with less better specs). Mar 17, 2019 · OPA1656, and most modern CMOS op amps with rail-to-rail output stages, use a biasing scheme often referred as a Monticelli bias, named after Dennis Monticelli who published the topology while at National Semiconductor. Spec : Fully balanced Dual 1ET400A Purifi modules Hypex SMPS1200A400 PSU Neutrik XLR inputs Sommer Cables Germany Custom Buffer OPA1656 DIP8 Second alu plate for heat dissipation Buffer Spec : - THD: 0,00026% @ Vin 2 opa1655 , opa1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, Mar 8, 2021 · 10 x OPA1656チップを搭載した最新の特別に再設計されたNFCAベースの回路を搭載しており、A30 Proは、同クラスの他のAMPと比較して出力を大幅に改善します。わずか0. This OPA offers excellent performance. 3V rails Jan 15, 2023 · our amplifiers standardly employ the OPA1656 op-amp, with the exception of our premium stereo and mono block models, which come equipped with the Weiss OP2-BP op-amps by default. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. 4 mV With the same configuration as above but reducing the feedback resistors by a factor of 10 for the first 2 stages, and increasing the bandwidth limiting caps to a frequency of 7. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. Jan 15, 2020 · Let's test this out! AnalogSteph had recommended the OPA1656. Marketing 101 by May 23, 2018 · Suggestion: as opa1656 has pretty low voltage noise, and very low current input noise as well as all the benefits of FET, it's less dependent to the source. 53 MHz gain bandwidth product, 24V/us slew rate. The low voltage noise combined with the low current noise make this device great for low and high impedance applications such as a high gain microphone pre-amplifier. This chip doesn't fit in the common DIP8 packaging, but thankfully @Audiophonics sells a pre-modified OPA1656 for 5 €. 2 and the 48v 7. Thread starter Talking about AIYIMA A07, it will end up in a dustbin soon. In conjunction with the UHGF (Ultra High Gain Feedback) topology, this ensures an ultra-low noise floor, where noise levels are recorded as just 0. 5 4. 25V to ±18V or (4. The FET-input architecture achieves a low 2. 1F X7R on the backside with the shortest possible lead length. Feb 20, 2021 · There are many reviews of audio hardware and expert members to help answer your questions. I used though the better TIs in output stages of middle class DACs as these benefitted from a more round /warm presentation with less details, as that masked their weaknesses and in fact Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. Jan 27, 2024 · The advantage of OPA1656 is that it has JFET inputs rather than bipolar, so its input bias current is much lower, making it easier to keep the output DC offset low in some applications. I wasn't compensated by anybody in any way. Desire to learn and share knowledge of science required. These were wired to use USB input to the Swing from my laptop, the DAC (fixed voltage) RCA outputs of the Swing to the RCA inputs on the Fun, and the Hifiman He560, Sennheiser 800, and Campfire Cascade (with Cloth pads) used for all listening sessions. 3µV, which translates to a THD+N of 0. Jul 4, 2009 · There's a thread on DIYaudio about the OPA1656, with a guy from TI telling very useful things. Just getting a better (cheap) opamp worth it. 9 nV/√Hz voltage noise density and 6 fA/√Hz current noise density, allowing for ultra-low-noise performance in a wide variety of circuits. Newer so-called audiophile op-amps have a higher bandwidth, than the traditional ones, so are more sensitive to board layout and can easily oscillate. To help others to understand what other audio components are being used, a SML SU-6 and SH-6 are used. The power supply is an outboard brick. One thing is that TI is not sending samples when request comes from private mail services like gmail and similar. 2V inside the negative rail and 2. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. Mar 17, 2019 · Here is a copy paste of the result for OPA1656 OPA1656 In the past I have to say I prefered widely the AD precise sound vs the softer traditional TI sound. It offers exceptional performance in almost any audio application. My OP1656 OpAmp Review. common mode voltage that I've measured on any op amp. I looked at the Slew Rate as my main May 19, 2017 · 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 really doesn't give much 20 kHz added safe composite loop Aug 26, 2020 · I pasted below my review of the A07 from earlier this month. I felt a great improvement overall. erccmjnrjhxcpziewsdcbrpvmvcahslgdbjqnslidusrvcy