Fosi Audio V3 Amplifier Review

[Juampa1989]

That makes sense. I was testing with a cheap Mii Bluetooth receiver that has no Vrms output specs. My plan was to use an iPhone with a ligtning to 3.5 dongle as a source. It's supposed to put out 1 Vrms with higher than 300 Ohns loads, which I guess any amp input is a lot higher than that. I'll see how this plays out and look for a proper DAC if not satisfied.

Thank you, @GXAlan!

Don't forget to look for a maximum of 2 vrms to avoid cuts. I have it with the fiio taishan d03k that gives 1.5 vrms. I bought and the smsl c100 quw gives 2 vrms which is the maximum of the fosi to use the entire volume of the fosi. I tested it with a fiio bta30 which is 3 vrms and trimmed with half a knob. It worked horrible, if I turned down the DAC, which can be adjusted with a knob, the audio was not of good quality. That's why I use the fiio taishan while the c100 arrives

 

[Juampa1989]

Hello, I take this opportunity to inform you that the c100 is discounted in case anyone is interested.
I just found this incredible item on AliExpress. Check it out! 50% DISCOUNT | SMSL C100 USB MQA DAC AK4493S XMOS

https://a.aliexpress.com/_mrefqXC

It is a dac that I consider to be a good companion for the fosi v3 given its specifications. The su1 was reviewed by amirm and it measured very well.
This one is quite similar to that one, the difference is that it has a remote control

 

[gasolin75]

Hello, I take this opportunity to inform you that the c100 is discounted in case anyone is interested.
I just found this incredible item on AliExpress. Check it out! 50% DISCOUNT | SMSL C100 USB MQA DAC AK4493S XMOS

https://a.aliexpress.com/_mrefqXC

It is a dac that I consider to be a good companion for the fosi v3 given its specifications. The su1 was reviewed by amirm and it measured very well.
This one is quite similar to that one, the difference is that it has a remote control

Not close to 50% off. Audiophonics just about the same price + what ever delivery you choose 2-3 days is fastest delivery for a european country

 

[Juampa1989]

Maybe it depends on the country or area

 

[gasolin75]

Used the provided link

 

[Zek]

It's really a 50% discount.

 

[Juampa1989]

Apparently it is not for all countries

 

[gasolin75]

Doesn't matter i don't need one

 

[burkm]

I discovered already, that some products and offers - unfortunatley - are not available to some countries. To bad...

 

[Mirmayand]

I think it's the best way to cool it down.

 

[antcollinet]

I think it's the best way to cool it down.

I don't know if you are joking or not. Either way - un-necessary

 

[wpo7]

I think it's the best way to cool it down.

why

 

[restorer-john]

I think it's the best way to cool it down.

Yeah, nah. This is better:

 

[Mirmayand]

I don't know if you are joking or not. Either way - un-necessary

I am not kidding. perfect solution

 

[Mirmayand]

Yeah, nah. This is better:

View attachment 314250

 

[Mirmayand]

I use this device

 

[Mirmayand]

I think it is a must for powerful devices…

 

[Kunti]

layman's question. The v3 uses standard 32v/5a power. running 6 ohm speakers. nominal input power 60 watts/maximum input power 150 watts. how many watts does v3 output? is this standard enough to run NS-333. or I need 48v/5a to get the most out of the speakers. thank you for your advice. sorry for my language, which may contain errors. Indonesia

 

[antcollinet]

I think it is a must for powerful devices…

If you don't mind 50+ dB of fan noise in your listening room.

 

[TheBatsEar]

I think it's the best way to cool it down.

Get yourself one of these, you can find them by searching for "Infrared Thermometer GM320" for below 10 bucks:
https://de.aliexpress.com/item/1005004177656909.html

I suspect it may be off half a degree or so at times, but it's close enough for technical applications. Try to measure the temperature of a clear sky in the heat of the summer, you will be surprised. ;-)

Anyway, i measured my V3@48V at 46°C at the highest, driving a pair of Wharefedale Linton 85 at "groovy" levels over a few weeks. 46°C feels hot to the touch, but is far from overheating the chip or any components. It's about as warm as the inside of my Yamaha A-S1200 or the surface of the enclosure of a MiniDSP Flex.
No need for active cooling, in my opinion. It may make yourself feel better, but there really is no need.


@Fosi Audio You got a winner, but it doesn't even come close to even the cheapest Yamaha, Denon, Rotel, NAD integrated amplifiers. Where is the remote? I want to switch between speakers, i want to connect multiple sources, i want tone controls and a headphone jack. Just a good implementation of a Texas Instruments TPA3255 won't be good enough in the long run.