Near the table on the left side, I see an IcePower 1200AS2 amplifier. It seems to be a very interesting module. Could you tell me more about it and compare it to other amplifiers?

Ahoj, mal by som na Teba otázku, bol by som rád keby si mi na to odpovedal, si skusený tak si myslim že tvoja odpoveď bude mať váhu :) Si počul oba zosilňovače , Normu IPA 140 a aj Audiophonics Purifi D class . Ktorý je lepší alebo ktorý znie pre teba lepšie? Ja mám momentalne zosilňovač od Audiophonics s Eversolo DMP -A8, ktoré pohaňaju B&W 702 S3, a Norma vyzerá na papieri veľmi zaujimavo :) Za skorú odpoveď Ti vopred ďakujem.... A veľa úspechov do ďalšej práce ;)

Supersonic V2 is my pick.

Great comparison! 211 is analytical, not warm. 2A3 is very similar to 300B. 300B was the richer and warmer sound (in my AvantGarde horn speaker, 300B excels in monoblock amplifier), with better attacks (probably due to its output power...). Trick for people finding then mellow: try with silver interconnects (VS only cooper) and Furutech GTX-D NCF(R) Rhodium receptacles.

Unitra brzmi świetnie, Epos wypada jak uniwersalny żołnierz w tym demo. Fajne zestawienie.

Hi Greg, I like your channel for your always very informative videos If you hadn't said there were two amplifiers I probably would never have heard a difference, using my modest little SONY wired headphones (MDR EX-650), on my laptop through a decent external USB DAC.

The current draw on some of these is insane. Many preamp / DAC regulators max out at 500mA and provide power to multiple opamps and other components. The 'Brute Force 1' requires 290mA. Probably worth thoroughly assessing a power circuit's abilities before installing a few of these.

Ciekawy projekt! Będę musiał przetestować. PS. mieliśmy okazję uścisnąć sobie ręce na AVS. Pozdrawiam więc ponownie :)

Very nice! Thanks for sharing.

Automatically voids original warranty of an amp or any other device, plus risk of over heating or worse. Space Lego gimmicks in this case but Grzesiu has a sense for creativity and marketing :)

EPOS is most natural to me. Thank you for your hard work.

Well now the A10 in the house? When it going to end with this bait and switch!

funny to see how you compare devices on song with dynamic range of few dBs, i think any op amp can do it well in 7-8 bit audio resolution

Weiss sound best to me. Lampizator sounds a little too soft compared to Weiss.

For the FOSI ZA3, what are your recommendations for the op amps you've already tested, from low to high? Thanks!

I've just ordered the Hypersonic, curious to compare it with the opamp i prefer until now

I have listened to this video before. I still like Amp B better that said I am not dropping $7000 on an amp. It is not that my credit card will not allow me to do it rather I object on principal alone. Since this is me listening again a few weeks latter I have to say I enjoyed both of them. There where things I liked about both of the amp choices. I can allow myself to purchase two of the ZA3's though! I could get two of the Fosi ZA3's and 4 opamps and have a fantastic sounding amp for a fraction of the price which is win win in my book!

С классом "D" это пустые хлопоты.

The V1 reminds me of the Muse 02 only a bit punchier. The V2 was the one that made my ears perk up first. When it switched to the V2 it was so drastic that even across the room I could immediately hear the difference. The V2 reminds me of the really nice sounding Kenwood intergrated amps that where Dual mono internal construction with everything being discreate componets no op amps from 1970's early 1980's. I might like to get 2 of those V2's and 2 hypsonics! The Hypersonic was amazing and that is what I will be ordering for sure. I have a wife and 3 sons and Christmas is awfuly close so might have to wait. I would like to get 4 or more to have on hand but will likely just order 2. I like it all. I like good highs, mids and lows and the ability to be very dynamic and quick when it is required. I like a clarity but not at the cost of texture, sound stage, and warmth. The hypersonic seemed to have it all while still being very balanced. The Brute Force was absolutely incredible sounding!! In the early 1990's I owned a McIntosh tube amp and a set of Sansui Mono Block amps and the Brute Force reminded me of those with a good source that was well mastered and very dynamic. It had it all the highs, lows and mids as well as incredible seperation and sound stage with lots of punch. It made the amp sound like an entirely different amp. I used to run really powerful amps and then only run them in the 1wpc to 20wpc range into very effecient speakers and that is what the Brute Force reminded me of. It was as if the amp suddenly developed more dynamic head room and power. It was hard to believe it was the same speakers and amp! Too bad it is so power hungry and generates so much heat!

i'm very curious about your opamps, sparcos labs Muses01,02,03, ss3602, burson audio v7 vivid, burson audio v7 classic pro, are they superior to these high-end opamps?

A decent poweramplifier doesn't need to be controlled by the pre-amplifier, it will listen to it's output signal and amplify it fully faithful and therefore fully transparent with the exception of the power needed to drive the loudspeaker correctly. I don't like your useless products certainly when you scratch of the type numbers of the OpAmps you use as I have seen on your own website. That is a shame in it self and show that none of your customers can trust you and your products. It's a discrase.

For the YT app. Settings - advanced - switch off stable volume may help a bit.

Hi-so with this parallel arrangement-these have got to draw way more current-so this is approved for DACs and Pre’s but not power amps yes? But wait I am confused--you are using these in power amps (ZA3) not DACs or preamps. Have you tested them with the Fosi V3 monos? Maybe cannot use in the V3 monos because they are already challenged with heat generation/dissipation. What about with the ZD3 DAC? Will the Supersonic V1 or the hypersonic further tame the SABR 9039 "glare" or "sheen"? I am listening on headphones attached to my laptop via Firefox. I can't hear much difference between these --they all sound good. Would be interesting to compare them with the non-parralled version of the op amps, and vs the muses02 and the Sparkos.

Which exact model op-amps used in 2/4/8 models? 🤔

Another idiotfool product... Will read them on forums discovering their CD tracks 😂😂😂

Would like to test "Hypersonic"in my XD05PRO via dip8 extenders :D very curious how these compare to V7 Burson or Sparkos SS3602 🫣

for me - A

Would the Hypersonic work in my Zero Zone TPA 3255 AliExpress monoblocks u think?

I’d like to see if you could install one of these op amps into an eversolo and see if there’s an improvement

Nice stuff. I'm very inclined to try them but I would need to know which one easily fit in which amp. It would be useful to have the info in the website, for example I have a fosi v3 at hand (in the past I bought some big op amps and had to sent them back cause I could not fit them).

Your a genius, thank you. I would like to see more about what looks to be some interesting power supplies you have there on my left. This 1 is tough, I'm leaning toward v2 but not sure, i think i would need to hear 15 - 30s clips with time stamps of each to compare.

i couldn't hear much of a difference. but i didn't download the video and didn't use my Hi-X55 headphone. this reminds me of an elektor low power amp project where they used something about 25 NE5532 op-amps or so as output stage.

My dac streamer has a transformator on the output❤

So you're telling me, by using 8 opamps to increase the current capability of the whole thing by 8, it's now capable of driving 256 poweramp input stages at once, instead of only 64? 😂😂 Seriously, that's such an exercise in futility. Input stages are so high in input impedance, any bog standard opamp is severely overpowered for the purpose already.

co za bzdury, litości. Kolejny etap wyciągania kasy od ludzi.

Maybe get a new hi-fi system, what you are hearing is bull. How does a sound become faster, The speed of sound is 344 km/s or do you listen under water. The op=amp cant sound fuller they all the same size filled with plastic. You have no idea what you are talking about. What kind of shit tastes best, dog, human, cat or bird shit. That would be more believable that to trust your ears since your mouth already speaks shit..

You talk so much shit! Why don't you go study some engineering rather than punt this nonsense on line. Typically a power amp has an input impedance of 10k or more, why would you need high current input drive. You are just plain stupid. Now you want to tel us how op-amps has another level of sound. You are just plain stupid.Have you got any idea how many op-amps the signal passes through from your microphone to my speakers, and now you want us to listen to that extra op-amp in the circuit. How dumb are you? You must have studied audiophile from some European backstreet institution? Amongst all those pieces of coloured bubblegum, can you identify which op-amps actually sound the best, there are thousands upon thousands of op-amps from different manufacturers all over the world and especially great faked ones from the East. Which are you promoting, do you have any idea.

You say that it is better to listen via browser. In my case: W11 optimized for multimedia (reduction of JITTER generated in the CPU: ALU <--> internal registers), Firefox -> JRiver MC 64 bits, which takes control of the audio via WDM driver. Firefox with uBlock Origin to avoid the advertising inserted by KZbin (or free Spotify). The sound from Firefox is better than in Chrome-based browsers.

This is a pretty cool idea!

This is a new product and needs better visualization during sound test. Hyper/SuperSonic V1/V2 means nothing to us when we can’t even see which opamp to relate to and what type/tech it has during sound demo. All we saw was a pretty carousel and names. Just skipped through it as usually…

This is a new product and needs better visualization during sound test. Hyper/SuperSonic V1/V2 means nothing to us when we can’t even see which opamp to relate to and what type/tech it has during sound demo. All we saw was a pretty carousel and names. Just skipped through it as usually…

I am currently in a noisy cafe so will listen to these later, but I think there's something about appealing to other senses when opamps start getting silly candy colors and shapes. I suspect people will get a preconditioned expectation bias based on looks and subconscious triggering of candy/fruit flavors. This colouring and shaping, if not out of necessity, has no place for internal components and costs extra money as part of design and manufacturing. I can therefore only suspect it's to intentionally play on subconscious bias cues.

More transistors in parallel ===> more output current, hence, giving you greater drive to produce the output signal presented to the power amplifier's input stage. The sound output would be more dynamic, ease of sound reproduction. and a fuller sound. Another way is to have a CLASS A transistor or tube output stage, this was done before many years ago, but bulkier. Viewers are conscious that sufficient or ample power in the sound chain produces excellent sound.

Great work, Greg. They all sound good in different ways. Perhaps the 8x was my least favourite. I prefer (without detailed listening) the x2V2 and x4. All the best, Rob in Switzerland

Please compare to the Sparkolabs SS2590 dual opamp.

Hi, can you test the Akliam lc5? I use them in my ZA3 and they sound great to my ears but I dont have other opamps to compare.

Hi! I'm glad that this idea, which I tried and made a video for, now has a factory implementation! Did you manage to find out which op-amps are included in parallel in these assemblies?

Did you test them with Fosi v3 mono? what opamps did you use to compare FOSI ZD3 & T+A DAC 200? Did you do it with open case? Pozdrawiam, Detektyw zakupowy ;)

I have an Allen&Heath Mod2 mixing desk from 1972, do you think the op-amps would reduce noise and clean up the signal, would love to use the desk as Stem mixer (it has 16 channels with 16 monitor return channels, take off 2 monitor channels for master and in theory I could have a 30 channel audio summing with 16 channels with original CARNHILL Transformers and a simple EQ), I don’t know how many op-amps are on each channel, so do you do bulk discount? (Or be interested in working with me as a joint project?) I think the power supply would need a major upgrade as well then if your op-amps are so hungry 🤭🤭🤭 Where are you based, I’m in Hannover, Germany

My real-time impressions. Magnat MA 900 (mod) in Direct OFF (JJ 12AT7 preamping). Convolution with brightness at 6.5kHz, +0.3dB, Q=2. KEF Q100 5.25" coaxial (mod) in near field. With Kimber Kabnle 8PR cables, now with 5 mm cotton rope inside (as Danny Richie suggested weeks ago and does with his cables, with similar geometry to Kimber's). 05:29 - Cherry - Hara Noda Super Sonic V2 - the best, more musical 08:29 - Falconeer - Lovren Super Sonic V2 - the best, more musical 10:29 - World Goes By - Houses On the Hill Super Sonic V2 - the best, more musical 13:29 - Love You For It All - Daniel Gunnarsson Super Sonic V2 - the best, more musical 16:29 - Hotel Lalo - Harry Edvino Super Sonic V2 - the best, more musical Super Sonic V2 - 10 points (more bass, highs OK) Super Sonic V1 - 8 points (more highs, too much with your speakers) 👉Hypersonic and Brute Force one - UNREAL SOUND, not credible. It is the same thing I notice in most 24/192 vinyl rips, too much spatiality, not credible, liking it better in 24/96 FLAC 0. Sometimes it is not like that, I have to decide in each rip