You can buy V3+48V (without 32V) on Aliexpress. Also look on Fosi website, and eBay.Amir also reviewed the very similar aiyima a07 that looks uglier but cheaper.
Wonder which one I should buy? Is it possible to buy one with the 48V PS, it will be a shame to have to pay for two, the 32 V that apparently comes with the amp and the 48 V that has to be bought separately.
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AIYIMA A07 TPA3255 Review (Amplifier)
This is a review and detailed measurements of the AIYIMA A07 desktop amplifier based on TPA3255 class D amplifier chip. It was kindly purchased new by a member and drop shipped to me. The cost is US $72 on Amazon including prime shipping. And as of this shipping, it also included a 32 volt, 5...www.audiosciencereview.com
I watched the linked video, thanks. After that, a few more popped up, most said the V3 sounded great, one said sounded better to his Marantz NR1200, but most of those Youtubers don't even understand they had to turned to volume up to almost max not because it was less "powerful" than the other amps they compared it to, but most likely because they didn't know the V3 is really a power amp, and volume max if quite normal for normal use with an active preamp.You can buy V3+48V (without 32V) on Aliexpress. Also look on Fosi website, and eBay.
I can't say anything really interesting about A07 vs V3. I think I remember people who had the A07 wrote they were happier with the V3. But this if far too vague to make your decision.
I would go with the prettiest (V3)
Edit: I remember this video. It focuses on stress test and temperature management. You are probably never going to use the amp like this. But it shows that the V3 case-heatsink design is not a gimmick, and works as advertised.
With a 32 v 5 amp source, with 1.5v vrms of the dac (preamplification), [the maximum it supports is 2 vrms]. At a distance of 2 meters I got 103db which already makes the ears hurt, the fosi was already with the knob at maximum. I can't imagine getting 117db out of it, it would have to be trimmed from the analog input, it doesn't give it 4 vrms and it's also a DAC for indoor environments. 117db is like for outdoor music. Nobody said it but the demand they made is outrageous. I get a maximum of 95 db peak and it can be heard loudly throughout the house. I have it in the living room which is on the second floor, the house is made of wood and is 120 m2. The living room is open. I don't know why I want more. In a closed room it will be 85db, a desk 75db, so I am deaf in one ear. For normal indoor use it has plenty of power, and as indicated only using the 32v source. My speakers are the Klipsch rp-160m. That its sensitivity should be around 88db.
Have you honestly seen the video and read the comments? Doesn't look like it.How is it not absurd and misleading to compare the $100 Fosi V3 to the $3,000 Yamaha A-S2100, and well above 100db to boot? It's hard not to conclude the whole exercise was a bad faith exercise IMO.
Also, was it noted anywhere the signal level fed to the V3? There were quite a few comments underneath the video calling the poster out about that. His answers brought more questions about his knowledge of gain and power.
Bottom line: OK, the $100 paperback-sized amp can't hack it at the most distant margins of operation possible. For the vast majority of use cases the little Fosi is a great performer as noted by Amir's testing.
Seems like he did, as he got the facts (probably most of it, in case I missed a thing or two) right.Have you honestly seen the video and read the comments? Doesn't look like it.
It wasn't just the A-S2100 but the little one as well. I react strongly to just calling people out as doing something in bad faith. But it seems like @SimpleTheater doesn't have anything more to say about it.Seems like he did, as he got the facts (probably most of it, in case I missed a thing or two) right.
It wasn't just the A-S2100 but the little one as well. I react strongly to just calling people out as doing something in bad faith. But it seems like @SimpleTheater doesn't have anything more to say about it.
I obviously watched the entire video AND read through the comments underneath. Silly question. The entire S.A. exercise seems in bad faith, or lacking in common sense, as do some of the insistent posters who dig for bad things to say about this little amp.Have you honestly seen the video and read the comments? Doesn't look like it.
I react strongly to people digging for bad things to say about something like this little amp that costs $100. I also believe that the poster of that video should have known the absurdity of comparing the Fosi to the A-S2100, not to mention the absurdity of driving the Fosi well over 100db in testing.It wasn't just the A-S2100 but the little one as well. I react strongly to just calling people out as doing something in bad faith. But it seems like @SimpleTheater doesn't have anything more to say about it.
Watch the video again @peng. The measurements and bulk of discussion were/was about the A-S2100, not the A-S1100. The A-S2100 sells for $3,000USD. You cannot see an argument for potential bad faith, lack of common sense at minimum, in asking a $100 amplifier to match performance with one costing $3,000, all at 100+db?I missed the part if he said anything "in bad faith". On that, I agree with you. In the video, S.T. did mention the little one but iirc, there wasn't measurements shown for that one so that's part of comparison is by subjective measurements (that I tend to ignore in most cases), but I might have missed a point there too if he did include measurements like he did with the A-S1100.
I think Holdt's reference of the "little one" was not the A-S1100, but something more entry level such as the A-S201 or S301 (don't remember exactly which one, but one of those two anyway, iirc). As I also said, I tend to ignore subjective views, and value reviews that have specs and measurement data.Watch the video again @peng. The measurements and bulk of discussion was about the A-S2100, not the A-S1100. The A-S2100 sells for $3,000USD. You cannot see an argument for potential bad faith in asking a $100 amplifier to match performance with one costing $3,000, all at 100+db?
Not if it's advertised as being as or more powerful as the Yamahas in question. -Why should it not be scrutinized for that?Watch the video again @peng. The measurements and bulk of discussion was about the A-S2100, not the A-S1100. The A-S2100 sells for $3,000USD. You cannot see an argument for potential bad faith in asking a $100 amplifier to match performance with one costing $3,000, all at 100+db?
Not if it's advertised as being as or more powerful as the Yamahas in question. -Why should it not be scrutinized for that?
Fosi-->
View attachment 314860
Yamaha A-S301-->
View attachment 314867
Yamaha A-S2100-->
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Being silly for pointing out false advertising..Now you're being silly. It is widely known that the typical amp specs advertised by the ChiFi companies are incomplete at best. If the argument was that you wish the ChiFi amp makers would create and publish full, complete specs of their equipment then you'd find no argument from me. I'd love to know dynamic power and damping factor for their gear, but this is $100 we're talking about from makers who are in their relative infancy.
The thing in this particular case is that long before this thread was launched, you already had in hand Amir's substantive testing results for the V3, showing something like 88wpc/8ohm and 144wpc/4ohms and good SINAD performance relative to the other amps tested by ASR. That the Fosi can't match the output of a $3,000 integrated amplifier, at 100+db, from one of the historical greats in the industry should not surprise you.
Being silly for pointing out false advertising..-Have we really gotten so used to cheap toy amps with nice SINAD values that we just don't care?
And no, I wasn't at all surprised it can't do what proper amps do. It was all expected and since the ASR review I figured it was a matter of time before it was pointed out. There will be more.