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Fosi Audio P4 Preamplifier Review

Rate this preamplifier:

  • 1. Poor (headless panther)

    Votes: 1 0.5%
  • 2. Not terrible (postman panther)

    Votes: 4 1.9%
  • 3. Fine (happy panther)

    Votes: 52 24.3%
  • 4. Great (golfing panther)

    Votes: 157 73.4%

  • Total voters
    214
Motorized volume control & input selection relays for a paltry $80, incredible. Surely a Wiim beating integrated will be the next step, follow the money!
 
Give me more details please.
Analog plus digital I/Os (balanced ADC+DAC) would allow and provide flexibility in doing EQ, even for those who wish to use 'cheater' cables between RCA/XLR I/Os.

I'd fundme that project, without giving you grief for throwing in different opamps; that I'd never entertain to use. What do you think?;)
 
I wonder if/when we'll ever see a high-pass filter from @Fosi Audio - either on an amp or preamp with a sub out. Seems odd not to have the option yet.
 
Thank you. Can you please also clarify the input impedance value? It’s missing from the specs
Oh,I didn't see your post.No matter how low it is,they should mention it.Topping does.
 
If it says 24-36V, then you can only use 24-36V power supply, but not 48V.


How do you use the 4-8 channels then?
@phoenixdogfan probably meant input channels, but I can think of how I'd use 4 output channels: 2 for mains, 2 to subwoofer(s). If mains have a basic adjustable 24db/oct highpass option, plus mono sum switch for sub outs, it would turn this thing into a true market gap filler, even if it cost 200 or 250. Make it 300 if they added selectable XLR/RCA in and out. Won't be as tiny anymore, obviously, but who cares.

Seriously, an affordable, good quality stereo preamp with simple but effective analog subwoofer management is perhaps THE biggest market gap I see right now.
 
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In the next products I would like to see a high pass filter with a sub output, as the A5 from douk audio did.
And then, even if I know that many do not care, a good old "loudness" button to click in the evening for low volume listening, audiophiles have campaigned against it, but in all the amplifiers and preamplifiers in which it was not there I have always missed it
 
In the next products I would like to see a high pass filter with a sub output, as the A5 from douk audio did.
And then, even if I know that many do not care, a good old "loudness" button to click in the evening for low volume listening, audiophiles have campaigned against it, but in all the amplifiers and preamplifiers in which it was not there I have always missed it
Thank you for your suggestions, HPF will be released soon, keep an eye on our new products.
 
It's just one of the most common successes encountered in audio...anyone with a little experience knows it or has been confronted with it...

i just ask...

without balance the subject is sensitive....
 
It's just one of the most common successes encountered in audio...anyone with a little experience knows it or has been confronted with it...

i just ask...

without balance the subject is sensitive....
Ok. Were you planning on purchasing this unit and doing research?
 
Come on with the BS, man. You're just being an insufferable know-it-all looking for reasons to complain.

This is a great product at a great price.
.
Please keep personal insults out of it.

Not what we do here.
 
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