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

Regular price: $99.99 USD
Sale price: $99.99 USD
Regular price: ~~$99.99 USD~~

Tax included. Shipping calculated at checkout.

supports up to 3 RCA inputs
3-Level Gain Adjustment
Treble & Bass Adjustment
Perfectly Paired with the V3 Amp
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Pre-order Shipping: Shipping is expected to begin in June

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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

User’s Manual 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.

P4 is a great device!

Works flawlessly for my audio setup. Input 1 is for a Bluetooth device. Input 2 is for audio from my hd television. Using the sub out for a powered subwoofer. All going thru a graphic equalizer prior to inputs into stereo receiver.
Audio never sounded better and simpler to integrate into my hi-fi system!

Really enjoying the P4

The P4 has been hooked up for a couple of weeks now and it’s great. I understand that shipping was delayed quite a while due to a key components supply chain but the wait was worth it. It’s exactly as advertised and at a great price. Thank you Fosi.

Brief and to the point

Just what I need and nothing more.

Great little preamp packed with features.

Sound is what it should be, no influence except for expected results from tone controls. I like the ability to disable tone control with switch. Also like the remote to control volume and select source. Remote is a little complex with buttons for products I don’t have. Other issue, which is only during setup, is the P4 is so light that with all the inputs connected the cables tend to move it around when the cables are bumped. All and all I would buy again and recommend it to all that need a small, fully featured preamp.