SoundPath Lab · Verified product profile
Fosi Audio V3
Minimal TPA3255 stereo power amplifier with RCA input and pre-out, intended for systems with an external source or preamplifier.
Verified data
Category-specific specifications
| Brand | Fosi Audio |
|---|---|
| Model | V3 |
| Product category | Power amplifier |
| Amplifier chip | TI TPA3255 |
| Claimed maximum | Up to 300 W/ch at 4 Ω; power-supply and load dependent |
| Measured-spec claims | THD ≤0.003%; SNR ≥110 dB |
| Inputs | RCA |
| Outputs | Speaker and pre-out |
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 external-source systems
- Desktop passive speakers
- Simple analogue chains
- Users selecting their own power supply
Not ideal for
- Users needing source switching
- Network/TV streaming
- Buyers treating headline power as continuous output
SoundPath verdict
What matters beyond the spec sheet
Strengths
- Verified amplifier chip data
- Strong functional value for the category
Weaknesses
- Users needing source switching
- Network/TV streaming
Biggest limitation
It requires an external source and its achievable power depends heavily on the power supply.
Best alternative
Fosi BT20A Pro for Bluetooth and tone controls.
Best-value use case
Low-cost external-source systems
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 firmware tracker and official support page.
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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