Fosi Audio V3 Amplifier Review

[saberger0357]

Bizarre. I really think, unfortunately, that there's still a misunderstanding because of language.


Hopefully they provide the right answer about return, and if not, I'd get the credit card involved and leave it to them.

 

[SuperDerpBro]

I forgot to mention what the problem was with my TB10D. The volume control lost balance at anywhere under 12 o'clock. The PSU also made a very annoying high pitched noise. It took about 7823 emails to get them to replace it.

The replacement did not include a PSU .. I gave up and recycled the original AMP, and PSU. I then sold the replacement for $25 on FB marketplace.

Fun times

Edit: they still want me to bend it. Maybe next time they will provide instructions for return.

 

[Jeromeof]

I see there is a very nice new V3 Promo Video on YouTube - heavily referencing ASR and @amirm testing of the V3:

 

[Ron Texas]

Does anyone know what the power draw of this amplifier is when it is idle, both when switched on and off?

 

[wpo7]

Does anyone know what the power draw of this amplifier is when it is idle, both when switched on and off?

which power suppy

 

[kelontong]

I see there is a very nice new V3 Promo Video on YouTube - heavily referencing ASR and @amirm testing of the V3:

They should pay ASR/Amir for adding in to their online ads...

 

[kelontong]

Does anyone know what the power draw of this amplifier is when it is idle, both when switched on and off?

based on my trusted watts-meter with 32V power brick:
* Idle is 1 Watt (very efficient)
* Good enough and not loud driving synergy bookshelf speaker set is ~4-7 watts. it stays 4W usually.

Disclaimer:
you may experience differences...

 

[kelontong]

I forgot to mention what the problem was with my TB10D. The volume control lost balance at anywhere under 12 o'clock. The PSU also made a very annoying high pitched noise. It took about 7823 emails to get them to replace it.

The replacement did not include a PSU .. I gave up and recycled the original AMP, and PSU. I then sold the replacement for $25 on FB marketplace.

Fun times

Edit: they still want me to bend it. Maybe next time they will provide instructions for return.

can you get discounted price?

when dealing with Chinese seller, I always ask discount due to not delivering their promise. They are rarely to do exchange and return (RMA).

Note:
If I am in doubt, I usually buy from Amazon prime that having easy returns, I did bought mini-pc and found out not as they advertise and returning to Amazon was easy.

 

[wpo7]

They should pay ASR/Amir for adding in to their online ads...

what about the rest of the YouTubers that they used in that video?

 

[Ron Texas]

which power suppy

48V

 

[wpo7]

based on my trusted watts-meter with 32V power brick:
* Idle is 1 Watt (very efficient)
* Good enough and not loud driving synergy bookshelf speaker set is ~4-7 watts. it stays 4W usually.

Disclaimer:
you may experience differences...

with 48v power supply I get approx 6 watts at idle

 

[Joe Smith]

Nice video, was interesting to see the scale of their production facilities...

 

[nishamn27]

The bass region, specificall around 60 to 100hz, seems to be very weak in low volumes for the v3. Giving an input signal of 2vrms.
I tried plugging in a couple of speakers as well as different power supplys.
The bass region tends to change after the volume reaches almost 3 o clock. Then the bass really thumbs out. I felt a change of tone as well at this point.
Didn't get any satisfactory response from fosi as well. Tried returning the amp and got another one. Same thing.
I'm not facing this issue with aiyima a07.

I doubt whether it could be related to any feedback resister value in the loop.

Anybody have felt the same ?

Thank you.

 

[kelontong]

what about the rest of the YouTubers that they used in that video?

not sure, might be adhere with youtube ToS?

 

[Zek]

I doubt whether it could be related to any feedback resister value in the loop.

I think that this is due to the fact that the V3 has a logarithmic volume potentiometer and not a linear one like most other amplifiers.

 

[antcollinet]

I think that this is due to the fact that the V3 has a logarithmic volume potentiometer and not a linear one like most other amplifiers.

Meaning you have to turn it further to get to the higher powers. Whereas a linear one might get close to maximum power at 12 clock, and then do very little after that.

 

[Zek]

Meaning you have to turn it further to get to the higher powers. Whereas a linear one might get close to maximum power at 12 clock, and then do very little after that.

 

[gasolin75]

On a separate note, are all amps that measure at 1 kHz the same? A 50 watt Yamaha blowing this 85+ watt amp out of the water on pure power?

Start watching at the 11 min 10 sec mark

32 or 48v psu ?

For max power he needs to use 4 ohm speakers, period.

 

[gasolin75]

The bass region, specificall around 60 to 100hz, seems to be very weak in low volumes for the v3. Giving an input signal of 2vrms.
I tried plugging in a couple of speakers as well as different power supplys.
The bass region tends to change after the volume reaches almost 3 o clock. Then the bass really thumbs out. I felt a change of tone as well at this point.
Didn't get any satisfactory response from fosi as well. Tried returning the amp and got another one. Same thing.
I'm not facing this issue with aiyima a07.

I doubt whether it could be related to any feedback resister value in the loop.

Anybody have felt the same ?

Thank you.

No problem here Fosi Audio TB10D quality 32v 10a power supply

Mabye the amp+ the a standard laptop power supply doesn't provide enough power at low levels, volume, like a car with not enough tourqe at low rpm

Someone wrote about a Fosi Audio TPA3255 amp it distorts above 75% or 3 o'clock

 

[antcollinet]

Mabye the amp+ the a standard laptop power supply doesn't provide enough power at low levels, volume, like a car with not enough tourqe at low rpm

That is not how amps work.

Low levels are low power. You don't need high power at low levels.