Fosi Audio V3 Mono Amplifier Review

[Jtabos]

Hey for $12 per unit, these are not bad at all!

MULTIFAN S1, Quiet USB Cooling Fan, 80mm

Your source to create smart growing systems with components including advance grow tents, inline fans, clip-on fans, LED grow lights, and UIS™ controllers.

acinfinity.com

-Ed

Indeed, but I bought the dual version on amz.es for 40eur!

Later I've found other brand that sells a similar 80mm duals just for 14 eur...

 

[Keauval]

Hi there from Portugal!
For those concerned about the shipping arrival, my V3 monos (2 x 48v 5a) just arrived and quickly joined their new partners: Wiim Mini - Fiio Br13 dac - Heco Aurora 300's - active Sub Jamo C910 and AC Infinity fans.
View attachment 377302
(Also came with two extra opamps).
They have replaced a Fosi Bt20a Pro (48v 5a), and so far, I'm happy with the upgrade.
Probably, I'll replace the Mini and the Fiio for the Wiim Ultra, just for the sub out and the room correction features, thou I don't really have complains about the room, because this is an (one side) open space; speaking of that, it's very common here to go higher than 40 C (104 F), so the fans were very useful to prevent the Bt20a Pro from reaching "melting temperatures".
View attachment 377303
I'd like to thank you all for the great information I've found in this forum that helped me to build this system.
Best regards
Juan

Hi, how is the sound compared to BT20A Pro please ?
Thanks

 

[GoDawgs]

Hey for $12 per unit, these are not bad at all!

AC Infinity makes great gear, I've gotten some of their other thermostats and fan systems for other hobbies. You can see the quality in the equipment they sell.

 

[EddNog]

AC Infinity makes great gear, I've gotten some of their other thermostats and fan systems for other hobbies. You can see the quality in the equipment they sell.

Other…hobbies…definitely the theme of YouTube reviews of their products LOL

 

[Miser_Audioman]

At least I received a standard text from Fosi via Kickstarter today
Better than nothing ...


"Hi, Our team is working diligently to ensure that your order is completed and dispatched by the end of this month at the latest. We are committed to providing you with the highest quality product and service, and we appreciate your understanding as we work to fulfill your order as quickly as possible.

Thank you once again for your patience and understanding. If you have any further questions or concerns, please do not hesitate to reach out to us.

Warm regards,
Fosi Audio Team"

Ah crap, well it seems i have a lot of suffering ahead. I can’t believe I have to keep listening to my HK avr for another couple months. Tragic, as I’m sure these are going to make a HUGE improvement to my sound quality. Youtube said as much lol…

 

[rgpit]

Has anyone from the USA received their V3 Mono or at least a notification of shipment? It seems all of the shipments have been going to the Asian or European markets.

 

[DavidMcRoy]

Has anyone from the USA received their V3 Mono or at least a notification of shipment? It seems all of the shipments have been going to the Asian or European markets.

I'm in (the State of) Washington, USA and got an email today with an estimated June 2024 delivery, but also requesting a shipping address verification. I don't think it'll make it here by the end of this month if they're just now asking for address verification.

 

[EddNog]

Has anyone from the USA received their V3 Mono or at least a notification of shipment? It seems all of the shipments have been going to the Asian or European markets.

I have my pair and have been listening since yesterday. I love them, and am extremely pleased with upgrading to them from the pair of ZA3s I had prior.

-Ed

EDIT: PS I’m in New Jersey.

 

[PJ_Schmidt]

Has anyone from the USA received their V3 Mono or at least a notification of shipment? It seems all of the shipments have been going to the Asian or European markets.

I'm in MN and the tracking I received last week shows delivery in two days (Thursday)

 

[Negatywny]

still nothing for me. I'm starting to feel a little anxious

 

[Nuigurumi]

Received them yesterday.
Great little amps and smaller than I thought. As mentioned before, they do get hot.
Using them to drive 'refurbished' Diatone DS77Z's.

 

[Borland]

Has anyone already received 48V 10A versions or only 5A?

I believe that Fosi has delivery problems with the 10A versions ...

 

[Negatywny]

for me it looks like equal problems with delivering the 5A power bricks also...

 

[Sokel]

Thanks, my mistake. Fosi posted a YouTube video earlier on V3 Mono heat dissipation. I am not worried with or without goop.

If it's connected and tested with a reactive -only- load,this video worths absolutely nothing.
We also don't know any of the test conditions,power used,etc.

 

[Sean B]

My pair arrived yesterday, initial thoughts - Fosi Audio products have blown me away, these are powering a pair of Dynaudio Special 40's, and making them sing like the Chord amp I loaned from a friend, when I say there's no difference that I can tell, apart from the price. These monos' are going to make a lot of supposedly big name and big price manufactures take notice.

I'm letting them run-in for a few days then I'll be back to update.


Thank You Fosi for actually making them, and thank you ASR for being part of the process!

 

[Jtabos]

Hi, how is the sound compared to BT20A Pro please ?
Thanks

Very good first impressions, especially the soundstage, it seems to be wider, so my listening sweet spot (2,5m) is now more flexible and I can move around without loosing information; also, I feel that I don't need to over 55-60 dbs to get all the details in the music.
The first image that came to my mind was the feeling you have when you first drive your car after a tune-up (engine, new tyres and shock absorbers)

 

[rhing]

I just received this message from Fosi Audio via Kickstarter:

Thank you for your continued support of our project. Due to some delays, our power filters will not be available for shipping until after the 15th July. We would like to know if you prefer we ship your other items now, or wait and send everything together once the filters are ready. Your feedback is invaluable to us, and we appreciate your patience and understanding as we work to fulfill your order.

Looking forward to hearing back from you soon.

Fosi Audio Team

I ordered two 48V/10A power supplies and replied to let them know to send my other items now rather than later.

 

[rhing]

My pair arrived yesterday, initial thoughts - Fosi Audio products have blown me away, these are powering a pair of Dynaudio Special 40's, and making them sing like the Chord amp I loaned from a friend, when I say there's no difference that I can tell, apart from the price. These monos' are going to make a lot of supposedly big name and big price manufactures take notice.

I'm letting them run-in for a few days then I'll be back to update.


Thank You Fosi for actually making them, and thank you ASR for being part of the process!


View attachment 377441

Very nice Dynaudio speakers with 86 dB sensitivity and 6 ohm nominal impedance. The Fosi V3 Mono amps should have ideal amplification characteristics to properly drive these to room-filling volumes. Looks like you received the little brown box that Fosi Audio normally ships op amps in. Did you opt to get the MUSES02 op amps or other types?

 

[Sean B]

Very nice Dynaudio speakers with 86 dB sensitivity and 6 ohm nominal impedance. The Fosi V3 Mono amps should have ideal amplification characteristics to properly drive these to room-filling volumes. Looks like you received the little brown box that Fosi Audio normally ships op amps in. Did you opt to get the MUSES02 op amps or other types?

Hi, well spotted! - I received the 2 MUSES02 but I'm not sure what to do with them as yet, I have read up on them and they seem an interesting option, way too early for me to start playing around with the sound stage! And thanks, they are stunning speakers, and as you've mentioned they do need the power these little amps provide. Heat is relative - I once used a Baird valve amp that I switched on in the morning as I left for work, it was warmed up by the time I got home! The heat the V3 mono produce isn't even mildly concerning.

 

[Borland]

I just received this message from Fosi Audio via Kickstarter:



I ordered two 48V/10A power supplies and replied to let them know to send my other items now rather than later.

I received the same email.
What does Fosi mean by "Power Filters"?

Does this mean that the power supplies can only be shipped after 15 July?