Fosi Audio P4 Mini
L2 · Documented recordChoose P4 Mini when several analogue line sources need compact remote volume control before a power amp or active speakers.Compact analogue preamplifier with three RCA inputs, remote volume control and bass/treble adjustment.
- System role
- PreamplifierConfirm the complete connection path
- Documented official version
- No recorded versionNo dated release recorded
- Independent test scope
- No dated SPL test recordedPublished scope and limitations remain separate
- Source checked
- 2026-09-24A source-check date is not a new device test
Updates & issues, along a timeline.
Latest record first. Expand to read the complete documented history.
Firmware & software
No matching public record has been added. This is not proof that no issue or update exists.
Product issues
No matching public record has been added. This is not proof that no issue or update exists.
Complete history: 0 records. Product, brand and update views use the same canonical event identifiers. Event date and source-check date remain distinct.
Where it fits
Compact analogue preamplifier and line-level source selector.
Limits: A DAC, phono preamp, streamer, headphone amplifier or speaker power amplifier.
Keep the conditions visible
It is intentionally analogue-only and should not be mistaken for a DAC, phono stage or streamer.
Full test scope, specifications & owner feedback ↓Full specifications, test scope, existing assessments & owner feedback
SoundPath Lab · Verified product profile
Fosi Audio P4 Mini
Compact analogue preamplifier with three RCA inputs, remote volume control and bass/treble adjustment.
Verified data
Category-specific specifications
| Brand | Fosi Audio |
|---|---|
| Model | P4 Mini |
| Product category | Preamplifier |
| Inputs | 3 × RCA line |
| Outputs | RCA pre-out/line path |
| Tone controls | Bass and treble ±12 dB |
| Claimed SNR | ≥110 dB |
| Claimed THD+N | ≤0.003% |
| Remote | Included; motorized volume control |
Unknown fields are not treated as supported. Exact services, firmware behavior and regional availability can change after the checked date.
System fit
Best for / not ideal for
Best for
- Multiple analogue sources
- Remote volume control
- Simple power-amplifier systems
- Budget source switching
Not ideal for
- Digital inputs
- Phono without an external stage
- Balanced systems
SoundPath verdict
What matters beyond the spec sheet
Strengths
- Verified inputs data
- Strong functional value for the category
Weaknesses
- Digital inputs
- Phono without an external stage
Biggest limitation
It is analogue-only and provides no DAC, phono stage or streaming.
Best alternative
Fosi ZP3 for balanced I/O, high-pass filters and trigger control.
Best-value use case
Multiple analogue sources
Knowledge graph
Reviews, comparisons, guides and risks
Reviews & explainers
No dedicated review is published yet.
Comparisons
No dedicated comparison is published yet.
Guides
Use the System Builder for a complete signal path.
Problems & risks
No model-specific issue page is published; absence of a report is not proof of no issues.
Firmware
Latest known software status
- Latest known version
- See official support page / tracker
- Updated
- Not separately verified
- Last checked
- 2026-08-22
- Notes
- See the official support page and SoundPath firmware tracker before applying an update.
Purchase verification
Available channels
Official channel is listed first. A missing retailer link means the exact model/region was not verified, not that the retailer never carries it.
Member knowledge · editor reviewed
Questions, owner experience and product issues
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