Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio
Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control - Fosi Audio

Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control with Remote Control

Prix habituel
$99.99 USD
Prix soldé
$99.99 USD
Prix habituel
$99.99 USD
Taxe inclu. Frais de port calculés à la caisse.
Learn More

Another Masterpiece Driven by Voice of Customers

The P4 is a mini preamp self-developed by Fosi Audio based on extensive feedback from users worldwide after the launch of the V3 stereo amp.
Input: RCA x3; Output: RCA, Pre-Out
SNR≥ 110dB; THD+N≤ 0.003%
Frequency Response: 20Hz-20kHz(±0.1dB)

The Mini Control Hub for Your Home Audio System

Easily connect up to three audio sources, with one-touch input switching for ultimate audio freedom.

Perfectly Paired with the V3 Amp

With a harmonious appearance, it elevates both the visual and audio experience of your sound system.

All-Aluminum Alloy CNC Construction

Metallic texture, compact and refined, with enhanced resistance to electromagnetic interference.

Adjust Bass and Treble at Ease

Achieve personalized sound signature for a tailored listening experience.

3-Level Gain Adjustment

Match different output levels from audio sources for improved sound quality.

Tone Control Bypass

Bypass the tone control circuit to enjoy the purest high-fidelity sound.

Enjoying a Convenient Audio Experience

Easily adjust the volume, switch sources, and control the tone without leaving your seat.

High-Precision Motorized Analog Pot

Offer smooth volume adjustment while reducing noise and distortion for a purer soundscape.

Swappable Op-Amp

Pre-Out Port

Expandable connection for powered subwoofers/powered speakers.
  • Mini Control Hub: The P4 supports up to 3 RCA inputs, allowing easy connection to CD players, streamers, DACs, cassette decks, and turntables with built-in phono preamp. Switch between sources with a click for seamless audio control.

  • Practical and User-Friendly: Equipped with volume control, bass and treble adjustment with bypass function, three-level gain control, and a remote. The preamplifier offers convenient audio setup and optimization, making every listening session effortless.

  • Motorized Potentiometer: Featuring a high-precision motorized analog pot, the P4 delivers smooth volume adjustment, reduced noise, and minimal distortion for a purer and more refined sound experience

  • Compact and Solid: The P4 stereo pre amp features a sleek, minimalist design that saves space and provides robust resistance to electromagnetic interference, ensuring reliable performance over time

  • Exceptional Performance: With a low noise floor, high signal-to-noise ratio, and extremely low distortion, the P4 pre amplifier delivers pristine audio, ensuring accurate sound reproduction and enhancing the listening experience for audiophiles

Channel: 2.0
Input Mode: RCA*3
Output Mode: RCA, Pre-out
SNR: ≥ 110dB
Dynamic Range: ≥ 110dB
THD+N: ≤ 0.003%
Crosstalk: ≥ 103dB
Noise Floor: ≤ 9μV
Tone Adjustment Gain: ±12dB
Frequency Response: 20Hz-20kHz(±0.1dB)
Power Supply: DC 12V/1.5A

  • Fosi Audio P4 Mini Preamplifier x 1

  • 12V/1.5A Power Supply x 1

First, connect P4 to your audio sources via RCA cables, then connect P4 to an amplifier via RCA cables, and lastly, use speaker cables to connect the amplifier to the passive speakers.

This is the bypass function for turning the tone control on and off. Sliding it up bypasses the bass and treble adjustments while sliding it down enables the bass and treble controls. The bypass switch won’t function on the volume control.

It ensures smooth, precise volume control, and enhances usability while reducing noise and distortion. When adjusting the volume with the remote, the potentiometer‘s motor syncs with the physical knob, providing a seamless and intuitive experience.

Allows for easy connection to external powered subwoofers or additional amplification. It ensures seamless integration with your audio system, enabling enhanced bass response or driving additional speakers for a more immersive listening experience.

Customer Reviews

Based on 8 reviews
88%
(7)
0%
(0)
0%
(0)
0%
(0)
13%
(1)
C
Charles Jackson
Order is lost in shipping

I would love to give a real review but the order seems to be lost in shipping.

T
Tony Zeigler Ii
Pre-amp for any level !

If you over look the size , the P4 have all the attributes “any” full size pre-amp has. It’s sounds great , built well and the price you can’t beat it. I bought it to try it , but after trying I found it can stand on it own ! I feel anyone will not be sorry ! Fosi P4 is a A+ !

G
GARRY KIYAMA

Fosi Audio P4 Mini Preamp with 3 RCA Inputs, EQ/Bypass, Treble & Bass Tone Control with Remote Control

H
Hreinn Jónsson
This was missing

Got my P4 yeasterday and have to say im werry pleased with it. Sounds great 3 rca just what I wanted tone adjust good. The volume jumps a little with the remote I can live with it maybe adjust that a little bit in the future otherwise its werry good gain adjust nice to have. And good price for 5 star amp :)

M
Michael
Future improvements

This looks incredible. I would absolutely love to see this with a 5-band equalizer. It’s the only thing missing from my fosi setup.