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Fosi Audio V3 Mono Amplifier Review

Rate this amplifier:

  • 1. Poor (headless panther)

    Votes: 14 2.2%
  • 2. Not terrible (postman panther)

    Votes: 20 3.1%
  • 3. Fine (happy panther)

    Votes: 126 19.4%
  • 4. Great (golfing panther)

    Votes: 490 75.4%

  • Total voters
    650
I think it's misleading that the V3 mono shows up in the ranking at 100 points, but when using RCA it would be at 94.
I recommend to change the ranking to:
V3 mono (balanced) 100
V3 mono (RCA) 94
 
I think it's misleading that the V3 mono shows up in the ranking at 100 points, but when using RCA it would be at 94.
I recommend to change the ranking to:
V3 mono (balanced) 100
V3 mono (RCA) 94
I think you’ll find the balanced measurement is used whenever available. It is typically a higher Sinad. It’s not misleading and many of us prefer to use balanced connections.
 
I think it's misleading that the V3 mono shows up in the ranking at 100 points, but when using RCA it would be at 94.
I recommend to change the ranking to:
V3 mono (balanced) 100
V3 mono (RCA) 94
you'll need to do that on every amplifier with balanced inputs .. so, i think is simpler to have the ranking with "the best result" as a standard and it's done.
if someone is interested in the details (i'll use rca / whatever), so read the review.
 
I understand, but if these rankings were in a database, and I'd filter by RCA.. the products would be in quite a different order I guess.
Some devices might even have better RCA implementation than balanced. And I wonder what the market shares are, 90% RCA?
 
I understand, but if these rankings were in a database, and I'd filter by RCA.. the products would be in quite a different order I guess.
Some devices might even have better RCA implementation than balanced. And I wonder what the market shares are, 90% RCA?
Perhaps closer to 80% overall market share for RCA, but for ASR reader base more like 80% XLR if I had to guess.

Complete guess though.

-Ed
 
I understand, but if these rankings were in a database, and I'd filter by RCA.. the products would be in quite a different order I guess.
Some devices might even have better RCA implementation than balanced. And I wonder what the market shares are, 90% RCA?

if the better implementation is RCA ... RCA SINAD will be in the ranking ... i don't get your point.
 
My Nakamichi PA-7 Mkll finally decided to take a time out the other day with a bad soft start circuit, so I decided to try these Fosi's out in the interim.

WOW!!!

Running 2 thru my Nak preamp, 2 10 Amp power bricks pushing the current, making my Montana ESP 2's sound sweet as ever.

Im sold.
 
My Nakamichi PA-7 Mkll finally decided to take a time out the other day with a bad soft start circuit, so I decided to try these Fosi's out in the interim.

WOW!!!

Running 2 thru my Nak preamp, 2 10 Amp power bricks pushing the current, making my Montana ESP 2's sound sweet as ever.

Im sold.
Can you give some info on your 10amp power bricks please.
Voltage,manufacturer, type, andwhere to purchase.

Thank you
 
Considering a pair of these to mount behind my floor standing speakers, it would be very interesting to see how they get on powering my ATC SCM40 loudspeakers.

Speakers not especially efficient 85dB @ 1m @ 1W
 
I am really interested to get a pair of V3 Mono amp, but saw there is a lot of issue with the amp burning. Not sure if Fosi have solved the issue with newer batch of V3 mono? Anyone who recently bought the V3 mono encountered any issue?
 
Probably a somewhat exaggerated way to say overheating and thermal failure.

-Ed
Has there been any significant evidence of that though? Other than the odd report of someone's amps failing, and the common misapprehension that "feeling warm" is "overheating"
 
Has there been any significant evidence of that though? Other than the odd report of someone's amps failing, and the common misapprehension that "feeling warm" is "overheating"
If there is, I haven’t seen it. My dad listens a few hours a day with the V3 Monos I gave him, driving Maggie LRS+ to levels a good bit higher than I listen to, and has had zero issues so far.

-Ed
 
If there is, I haven’t seen it. My dad listens a few hours a day with the V3 Monos I gave him, driving Maggie LRS+ to levels a good bit higher than I listen to, and has had zero issues so far.

-Ed
I suspect this is the experience of almost all owners. Just like any product though, there can be some early life failures.
 
I am really interested to get a pair of V3 Mono amp, but saw there is a lot of issue with the amp burning. Not sure if Fosi have solved the issue with newer batch of V3 mono? Anyone who recently bought the V3 mono encountered any issue?
As far as I know Erin's audio corner is the only one that has burned up one amp
 
As far as I know Erin's audio corner is the only one that has burned up one amp
There are many reported case in Fosi's forum and review page. I saw a few here as well. Go back 1 page you can see there's a few reported. Youtube Reviewer New Record Day also had one burned.
 
There are many reported case in Fosi's forum and review page. I saw a few here as well. Go back 1 page you can see there's a few reported. Youtube Reviewer New Record Day also had one burned.
If people (EG Erin) are killing them doing full power sine sweeps as tests, that is a whole different ball game from breaking them listening to music.

There is a reason Amir doesn't do that here - especially with people's loaned units.
 
There are many reported case in Fosi's forum and review page. I saw a few here as well. Go back 1 page you can see there's a few reported. Youtube Reviewer New Record Day also had one burned.
Well I can give you a contrary report that my 300s have always run flawlessly and at comfortable temperatures when working, completely cool to the touch when in standby. Does that help :)

That said i just play music on mine in normal sized room at levels that won't damage my hearing so they aren't really being stressed at all. Their single 10A supply is sufficient as well - I haven't needed to get the second power supply I had originally considered.
 
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