SoundPath Lab · Verified product profile
Fosi Audio P3
Budget tube-buffer preamplifier and headphone amplifier with RCA input and Bluetooth 5.1 aptX support.
Verified data
Category-specific specifications
| Brand | Fosi Audio |
|---|---|
| Model | P3 |
| Product category | Tube preamplifier / headphone amplifier |
| Bluetooth | 5.1 QCC3031; aptX/aptX HD/aptX LL/AAC/SBC |
| Inputs | RCA and Bluetooth |
| Outputs | RCA/AUX and 3.5 mm headphone |
| Headphone power | 20 mW at 300 Ω; 150 mW at 32 Ω manufacturer rating |
| Claimed SNR | ≥103 dB |
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
- Low-cost headphone listening
- Adding Bluetooth to an analogue system
- Users seeking tube-buffer flavor
- Easy-to-drive headphones
Not ideal for
- Demanding planars or insensitive headphones
- Balanced systems
- Users seeking measurement-neutral transparency
SoundPath verdict
What matters beyond the spec sheet
Strengths
- Verified bluetooth data
- Strong functional value for the category
Weaknesses
- Demanding planars or insensitive headphones
- Balanced systems
Biggest limitation
Headphone output is modest for demanding loads and the tube stage is a preference, not an accuracy upgrade.
Best alternative
Fosi ZH3 for a full USB DAC and more capable desktop hub.
Best-value use case
Low-cost headphone listening
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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