Fosi Audio V3 Mono Amplifier Review

[gwing]

I think you mean @Negatywny just needs that. I actually have a few pairs of spare/unused XLR cables laying around as it is.

-Ed

Exactly so, sorry.

 

[Keauval]

Hi everybody,
I just have a little question.
Do you know why the Max power of 2x V3 Mono is really similar that 1x BT20A pro with a 48V PSU ?

BT20A Pro

V3 Mono

I'm asking myself if the upgrade is really valuable.. I have 83db pair of speaker and they need a lot of power !
Thanks

 

[NTK]

Hi everybody,
I just have a little question.
Do you know why the Max power of 2x V3 Mono is really similar that 1x BT20A pro with a 48V PSU ?

BT20A Pro
View attachment 375781

V3 Mono
View attachment 375783

I'm asking myself if the upgrade is really valuable.. I have 83db pair of speaker and they need a lot of power !
Thanks

The mono version runs the TPA3255 amplifier chip in the parallel bridge-tied load (PBTL) mode. It doubles to current output capacity of the stereo version by running both channels in parallel, but it does not increase the voltage output capacity.

The PBTL mode is useful if your loudspeaker has very low impedance (< 4 ohms). It offers very little advantage if your speakers' impedance does not drop significantly below 4 ohms for a large part of the frequency range that demands high power (such as <200 Hz).

 

[rhing]

I inquired Fosi Audio about my Kickstarter order. Here is the response I received via their Web site chat:

“We will be shipping around the 20th of June. Please be patient as orders will be high and we will ship in chronological order of purchase!.”

I am # 92 in the Kickstarter queue.

 

[Megaken]

I inquired Fosi Audio about my Kickstarter order. Here is the response I received via their Web site chat:

“We will be shipping around the 20th of June. Please be patient as orders will be high and we will ship in chronological order of purchase!.”

I am # 92 in the Kickstarter queue.

You'll be lucky if you'll get it in August/Sept.

 

[DavidM1]

You'll be lucky if you'll get it in August/Sept.

Lol. I’m a bit over this kickstarter process too.

 

[Borland]

I am Backer No.4

 

[Chipk]

Just got my tracking id. Email says 1-2 weeks.

 

[Lee T]

I've just had the following message from Fosi.

Thank you for supporting our V3 Mono crowdfunding project on Kickstarter. We have shipped the reward “EARLY BIRD | 4 sets | 20% OFF” to your place and you may receive it in the coming 1-2 weeks. Please monitor the tracking information via the link below.​

TRACKING NO
Thank you again for your great support!

It would inspire more confidence if they listed my entire order, including extras. I'm keeping my fingers crossed that everything arrives.

I believe they're shipping batches in Kickstarter pledge order. I was #37.

 

[kelesh]

I've just had the following message from Fosi.

--------------

Vague, ambiguous. Does this mean they shipped the reward separately from the main order?

 

[GGroch]

Vague, ambiguous. Does this mean they shipped the reward separately from the main order?

No, in Kickstarter the entire order is the reward. Go to your Kickstarter page and click the reward button at the top to see what you signed up for listed. I have done a couple of previous Fosi KS and this response is normal.

 

[DavidMcRoy]

Vague, ambiguous. Does this mean they shipped the reward separately from the main order?

Probably a form letter that everybody gets when their order ships, no matter what it contains?

 

[Keauval]

The mono version runs the TPA3255 amplifier chip in the parallel bridge-tied load (PBTL) mode. It doubles to current output capacity of the stereo version by running both channels in parallel, but it does not increase the voltage output capacity.

The PBTL mode is useful if your loudspeaker has very low impedance (< 4 ohms). It offers very little advantage if your speakers' impedance does not drop significantly below 4 ohms for a large part of the frequency range that demands high power (such as <200 Hz).

Thanks for your answer !
So for a low sensibility speaker (86db, needs 200WPC), TPA3255 is perhaps not the best choice.. any recommendation please ?
Thanks

 

[JeremyFife]

Thanks for your answer !
So for a low sensibility speaker (86db, needs 200WPC), TPA3255 is perhaps not the best choice.. any recommendation please ?
Thanks

How loud are you listening? A quick check indicates that making a sound as loud as a pneumatic drill (91dB) at 3 meters from your speakers (allow 6dB headroom in case you want louder peaks!) with your speakers needs 113W ... That's loud for little amps and normal home hi-fi. Do you really need that?

Crown Audio - Professional Power Amplifiers | English (US)

www.crownaudio.com

 

[gwing]

You'll be lucky if you'll get it in August/Sept.

What do you reckon for #697 then :-(

 

[Keauval]

How loud are you listening? A quick check indicates that making a sound as loud as a pneumatic drill (91dB) at 3 meters from your speakers (allow 6dB headroom in case you want louder peaks!) with your speakers needs 113W ... That's loud for little amps and normal home hi-fi. Do you really need that?

Crown Audio - Professional Power Amplifiers | English (US)

www.crownaudio.com

It's true, I can listen a little bit loud
But more true, the room is 45m2 and listening distance can be around 5~6 meters... perhaps that's the problem
I was surprised to use the BT20Pro at 80~90% power rating.. and prefer to have some power reserve... but perhaps V3 Mono will improve that

 

[JeremyFife]

It's true, I can listen a little bit loud
But more true, the room is 45m2 and listening distance can be around 5~6 meters... perhaps that's the problem
I was surprised to use the BT20Pro at 80~90% power rating.. and prefer to have some power reserve... but perhaps V3 Mono will improve that

Fair enough, that's a decent amount of space to fill. Might be worth opening a new thread and setting out what you are looking for

 

[Lee T]

Vague, ambiguous. Does this mean they shipped the reward separately from the main order?

It would only make sense that they ship everything together (apart from the SP601 speakers, which will be delayed). As yet I've heard nothing from Fosi to confirm what items I've backed. It makes sense that they should do that before shipping as correcting mistakes and misunderstandings after they've already shipped is an expensive way to resolve mistakes.

 

[sl1982]

I've just had the following message from Fosi.



It would inspire more confidence if they listed my entire order, including extras. I'm keeping my fingers crossed that everything arrives.

I believe they're shipping batches in Kickstarter pledge order. I was #37.

I was backer number 35 and have not received any email or tracking info.

 

[DavidM1]

I was backer number 35 and have not received any email or tracking info.

I’m number 7 and no email either.

Curious.