AliexpressThe Fosi Audio V3 Stereo is a two-channel Class-D power amplifier for a straightforward passive-speaker setup. It uses the TI TPA3255 amplifier chip and provides stereo RCA analog input, speaker binding posts and a 3.5mm pre-out. This selected variant is the amplifier only: it does not include a DC power supply, speakers, source device or connection cables.
Connections and controls
The front panel has a power indicator and a combined power and volume knob. On the rear, the stereo RCA input accepts an analog source such as a preamp, DAC or other line-level device. Speaker binding posts connect to passive speakers, while the 3.5mm pre-out can connect to compatible downstream equipment. The manufacturer describes the pre-out as variable, but revisions may differ, so confirm the actual revision if pre-out volume behavior is important.
- Two-channel Class-D amplification using TI TPA3255
- Stereo RCA analog input
- Speaker binding-post outputs for passive speakers
- 3.5mm pre-out
- Front power and volume control
- Ventilated case design
What this variant requires
Because this listing option is “no power supply,” the DC adapter and AC cable or plug are excluded. A compatible manufacturer-specified DC supply must be obtained separately. The manufacturer identifies a DC24–48V range and names 32V5A and 48V5A options, but voltage alone is not enough: check the connector, polarity and required capacity before connecting power.
You will also need passive speakers, an analog source or separate DAC, and suitable cables. This amplifier does not provide Bluetooth, USB, optical DAC, microphone input or tone controls. Powered speakers should not be connected to its amplified speaker outputs.
Specifications
| Model | Fosi Audio V3 Stereo |
|---|---|
| Amplifier type | Two-channel Class-D |
| Amplifier chip | TI TPA3255 |
| Input | Stereo RCA analog |
| Outputs | Speaker binding posts; 3.5mm pre-out |
| Power supply | Not included; manufacturer range DC24–48V |
| Selected package | One V3 stereo amplifier only |
Practical limitations and buying checks
Keep the ventilation openings clear and follow the manual when connecting speakers and power. Do not treat illustrations showing alternate knob finishes or internal components as confirmation that extra knobs or accessories are included. This is not the V3 Mono, V3+P3 bundle or a two-unit package.
- Confirm that your speakers are passive and compatible with the amplifier connection.
- Plan for a separate analog source or DAC.
- Verify the DC adapter’s connector, polarity and capacity, not just its voltage.
- Check the product revision if control of the pre-out is central to your setup.
US price and shipping snapshot
Price checked: October 19, 2026. The selected Color: no power supply; one V3 stereo amplifier only, not V3 Mono and not V3+P3 bundle option from Fosi Audio Official Store showed free ordinary shipping to the checked Cedar Lane, US destination, with estimated arrival October 26–November 2. These are live listing observations, not a completed checkout or delivery guarantee. Prices and availability vary with variant, seller, destination, account, promotion and time. The listing marked this as a one-time offer for one item. Check applicable taxes and final charges before paying, and re-select this exact option if the affiliate link resets the variant.
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