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

Normaler Preis
$99.99 USD
Verkaufspreis
$99.99 USD
Normaler Preis
$99.99 USD
Steuern inklusive. Der Versand wird an der Kasse berechnet.
  • supports up to 3 RCA inputs
  • 3-Level Gain Adjustment
  • Treble & Bass Adjustment
  • Perfectly Paired with the V3 Amp
  • Pre-order Shipping: Shipping is expected to begin in July
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: ≥ 105dB
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 59 reviews
86%
(51)
3%
(2)
2%
(1)
3%
(2)
5%
(3)
J
Jochen Hüfing
Super Vorverstärker

Klasse Vorverstärker, mit genügend Anschlussmöglichkeiten, gut durchdachtes Konzept, Bypass und Gainschaltung, individuell anpassbar, klanglich sehr guter Sound, das Warten auf die Lieferung hat sich gelohnt. Vielen Dank

I
Igor Bogatsch

Obwohl meine Bestellung vor 20 Tagen bearbeitet und bezahlt wurde, habe ich sie immer noch nicht erhalten

H
Håkan Lekberg
To sensitive Volume control

A very solid built preamp, this was the last step in my HiFi setup. The idea was to regulate the volume before the signal goes out to the amp. Unfortunately the volume is so sensitive so just a small increase from 0 volume makes the volume to high. I needed to reconnect the amp and continue to regulate the volume in the streamer.

P
PAOLO AMADORI
Small size great sound

I bought a P4 pre with 2 Fosi mono amplifiers. Indiana line Diva 6 tower speakers. Compared with previous Rotel ra 12 integrated amplifier the result is impressive: deep basses , detailed voices, calibrated mediums.

N
Neeraj Kumar
P4 preamplifier with v3 mono amplifier

The preamp matches the v3 mono blocks beautifully. Unbelievable audio quality out of the box. The one thing missing from fosi audio is a network streamer. Hopefully fosi as always will listen to their customers soon. Way to go fosi…