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FOSI AUDIO P4 Preamplifier
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Fosi Audio P4 Preamplifier
The Fosi Audio P4 preamplifier is a compact and versatile solution. With its three stereo RCA inputs, volume control with motorised potentiometer, tone control, gain selection and neat design, it offers a high-quality sound experience.
Fosi Audio P4: Motorised volume potentiometer
The Fosi Audio P4 features a motorised volume control. As well as providing smooth volume control, this solution also reduces noise and distortion, delivering a better-defined soundstage.
Fosi Audio P4: Three gain level
The Fosi Audio P4 features a gain selector, allowing you to choose from three levels of gain to suit the output levels of different sources.
Fosi Audio P4: Tone control
Two buttons on the front of the Fosi Audio P4 allow you to adjust the bass and treble levels over a range of ±12dB. This makes it possible to adjust the output of the device to suit your system, your music and your listening style.
Fosi Audio P4: Tone control bypass
If you're not interested in the tone control offered by the Fosi Audio P4, it can be completely disabled using the bypass switch on the back of the unit. So you can enjoy the purest listening experience of the P4.
Fosi Audio P4: Pre-out
The Fosi Audio P4 features a pre-out on a 3.5mm jack, allowing you to expand your system, in particular by adding an active subwoofer.
Fosi Audio P4: Aluminium alloy chassis
The Fosi Audio P4 is housed in a compact, precision CNC-machined aluminium alloy enclosure. As well as giving the device a modern look, this limits the impact of electromagnetic interference on the signal.
Overview of the Fosi Audio P4
| 1 | ON-OFF / Input selection button |
| 2 | Bass control |
| 3 | Treble control |
| 4 | Input indicator |
| 5 | Volume control |
| 6 | IR receiver |
| 7 | Tone control bypass |
| 8 | RCA inputs |
| 9 | RCA output |
| 10 | Jack 3.5mm pre-out |
| 11 | Jack DC 12V power input |
| 12 | Gain switch |
Fosi Audio P4 remote control overview
| 1 | ON-OFF button |
| 2 | Volume + |
| 3 | Input button |
| 4 | Mute |
| 5 | Volume - |
| 6 | P4 mode activation button |
Buttons with no indication are not assigned.
Technical characteristics
| Specifications | |
|---|---|
| Product type | Preamplifier |
| Channels | Stereo (2.0) |
| Inputs | 3x Stereo RCA |
| Outputs | 1x Stereo RCA 1x Jack 3.5mm pre-out |
| SNR | ≥ 110dB |
| Dynamic range | ≥ 110dB |
| THD+N | ≤ 0.003% |
| Crosstalk | ≥ 103dB |
| Noise floor | ≤ 9µV |
| Tone control (bass / treble) | ±12dB |
| Frequency response | 20Hz - 20kHz (±0.1dB) |
| General | |
|---|---|
| Supply voltage | 12VDC 1.5A |
| Color | Black |
| Package | 1x Fosi Audio P4 1x Remote control 1x Power supply |
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