Fosi Audio P4 Pre Amplifier

Highlights of the Fosi Audio P4

• Three RCA inputs for connecting multiple analog audio sources
• Bass and treble control with bypass function for a pure signal path
• High-precision motorized analog potentiometer for smooth volume adjustment
• Three-level gain adjustment to match different source output levels
• RCA output and pre-out for system expansion with powered speakers or subwoofers

Product details Fosi Audio P4

Fosi Audio P4 Mini Preamplifier

The Fosi Audio P4 is built as a compact control center for a home audio system. With three RCA inputs, it lets you connect sources such as CD players, streamers, DACs, cassette decks and turntables with a built-in phono preamp, then switch between them easily from one central unit.

For fine-tuning your listening setup, the P4 offers volume control, bass and treble adjustment, and a three-level gain setting. The bypass function lets you remove the tone control circuit from the signal path when you want the cleanest possible high-fidelity playback, while the gain control helps match different source output levels.

The high-precision motorized analog potentiometer gives the P4 smooth and precise volume adjustment while helping to reduce noise and distortion. When using the remote control, the motorized control follows the physical volume knob, making operation intuitive from your listening position.

System integration is straightforward: connect your sources to the P4, then run RCA cables to an amplifier or use the pre-out for powered speakers, a powered subwoofer or additional amplification. With an SNR of at least 110 dB, THD+N of no more than 0.003% and a 20 Hz to 20 kHz frequency response within ±0.1 dB, the P4 is designed for clean, accurate stereo performance in a space-saving enclosure.