説明
In an era dominated by hyper-compressed streaming and clinical digital-to-analog converters, sound has lost its physical warmth. The Fosi Audio P4 is designed as the restorative heart of the modern desktop audio system—a precision analog preamplifier engineered to reclaim tone, dynamic headroom, and intimate musical presence.
The Fosi Audio P4 featuring precision CNC aluminum volume dial, independent tone controls, and source selector switch.
Architectural Masterclass in Analog Sound
The P4 acts as an uncompromised control center between your digital sources (DACs, streamers, turntables) and power amplifiers or active studio monitors. Featuring three independent gold-plated RCA inputs, the P4 eliminates the need to constantly swap audio interconnects. With a dedicated source selector switch on the front panel, transitions between digital streaming, analog vinyl, and secondary DAC setups remain seamless and noiseless.
Key Performance Highlights
- Swappable Dual DIP-8 Op-Amp Sockets: Comes factory-equipped with Texas Instruments NE5532 op-amps, allowing audiophiles to effortlessly roll op-amps (e.g., OPA2134, MUSES02, SparkoS SS3602) to tailor soundstage and tonal texture.
- 3 Gold-Plated RCA Inputs + 1 RCA Output: Simultaneously connect multiple desktop sources without signal degradation or crosstalk.
- Hardware Tone Bypass Mode: Pure direct analog pass-through switch bypasses treble/bass equalization circuits for absolute signal neutrality when paired with high-end reference DACs.
- Precision Equalization Circuitry: Smooth ±6dB treble and bass tone controls allow tailored acoustic correction for near-field desktop reflections and speaker voicing.
Rear panel gold-plated RCA terminals ensuring high conductivity and zero ground loop noise.
Technical Specifications
| Parameter | Specification |
|---|---|
| Audio Inputs | 3 Sets of Stereo RCA Terminals |
| Audio Output | 1 Set of Stereo RCA Terminals |
| Op-Amp Architecture | Dual TI NE5532 (DIP-8 Swappable Sockets) |
| Frequency Response | 20Hz - 20kHz (±0.5dB) |
| Tone Adjustment Range | Treble ±6dB, Bass ±6dB (Bypass Switchable) |
| THD+N | ≤ 0.003% @ 1kHz |
| SNR | ≥ 102dB |
| Power Supply | DC 12V High-Precision Power Adapter |
Tool-less op-amp swapping architecture allowing infinite customization of sound characteristics.
Customer Reviews
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