Fosi Audio P4 Mini Preamplifier Preamp w/ Bypass Function Adjustable Gains & 3 Groups of RCA Inputs

Fosi Audio P4 Mini Preamplifier Preamp w/ Bypass Function Adjustable Gains & 3 Groups of RCA Inputs

Features:
Studio-Level Signal Accuracy | ±0.1dB Frequency Response & 105dB SINAD
* Pure, untainted reference-quality sound, tailored for discerning ears
* With a flat frequency response from 20Hz to 20kHz (±0.1dB) and a 105dB SINAD, the P4 achieves nearly lossless signal transmission. Featuring Japanese audio capacitors (for ELNA) and gold-plated signal relays for Omron, it eliminates current noise to ensure every detail is faithfully reproduced, rivaling the performance of high-end preamps costing tens of thousands.

Three-Input Hub | One-Touch Switch Between CD, Vinyl, and DAC
* Say goodbye to constant plugging and unplugging. And you can build a multi-device HiFi system.
* Three independent RCA inputs allow you to simultaneously connect a turntable (with external phono preamp), CD player, and high-end DAC. With the infrared remote, you can easily switch between sources with a single button press. Whether you're enjoying your classic vinyl collection or streaming Hi-Res music, simply press a button to experience seamless listening.

Gain Staging + Motorized Potentiometer | Precision Matching for Power Amplifiers
* Perfectly adaptable from low-sensitivity to high-resolution systems
* 3dB/6dB/9dB Gain Adjustment
  * * Low Gain (3dB): Protects sensitive power amplifiers from overload distortion.
  * * High Gain (9dB): Reduces system noise floor and enhances dynamic range.
* The vintage motorized volume knob for ALPS uses an analog potentiometer structure with left-right channel error <0.1dB, ensuring smooth, unbiased volume control

Tone Control Freedom | Adjustable EQ + Replaceable Op-Amps + Bypass Mode
* Supports precise monitoring and personalized sound tuning
* Midpoint-adjustable bass and treble: Compensate for room acoustics or enhance rock/jazz atmospheres.
* HiFi Bypass Mode: Provides a direct signal path by bypassing the EQ circuit, delivering pure, uncolored, high-resolution sound.
* Replaceable op-amp design: Compatible with popular dual-op-amp chips (such as MUSES02 and OPA2604), allowing you to easily customize the sound signature to your preference—whether it's a "warm tube-like" or "crisp, analytical" tone.

Minimalist Control Aesthetic | Full-Function Remote + Compact Metal Chassis
* Ideal for both desktop and rack setups, blending seamlessly into high-end systems.
* Comprehensive remote control: Power on/off, switch inputs, and adjust volume/mute without the awkward "bending over to find the knob" experience.
* PRE OUT Output: Connect an active subwoofer for a 2.1 system, or link multiple amplifiers for multi-room audio.

Specifications:
* Channel: 2.0
* Input: RCA × 3 groups
* Output: RCA and 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

Packing List:
* 1 × P4 Preamplifier
* 1 × IR Remote Control
* 1 × 12V 1.5A Power Adapter
* 1 × User Manual
    
Packaging Details:
* Weight: 1kg