Fosi Audio V3
L2 · Documented recordChoose V3 when an existing source or preamp needs a small, low-cost stereo power stage for compatible passive speakers.Minimal TPA3255 stereo power amplifier with RCA input and pre-out, intended for systems with an external source or preamplifier.
- System role
- Power amplifierConfirm the complete connection path
- Documented official version
- Not applicableNo 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.
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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
An RCA-input stereo power/integrated amplifier with volume control and pre-out.
Limits: A DAC, Bluetooth/network streamer, HDMI hub, phono stage or headphone amplifier.
Keep the conditions visible
Its simplicity is the value; quoted maximum wattage is not a guarantee at every load or with every power supply.
Full test scope, specifications & owner feedback ↓Full specifications, test scope, existing assessments & owner feedback
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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