Name: Fosi Audio V3 2.0 Stereo Amplifier 2x300W with 48V 5A PSU
Brand: Fosi
SKU: V3
Price: 130.38 EUR
Availability: InStock

2.0 stereo amplifier with 48V / 5A power supply

Small box, serious two-channel headroom.

The Fosi Audio V3 is a compact 2.0 Class-D stereo amplifier built around the TI TPA3255 chip. This version includes the 48V / 5A power supply, giving the amp the voltage headroom it needs for strong passive speaker setups or a serious two-channel tactile rig. Use it for left/right bass shakers, seat and pedal feedback, compact Hi-Fi, or larger tactile transducers where you want real punch without a full rack-style amplifier.

48V / 5A PSU included 2x300W max @4 Ohm TI TPA3255 chip RCA input

Fosi Audio V3 stereo amplifier - OCRacing

Fosi Audio V3 front and rear connections - OCRacing

Fosi Audio V3 with 48V 5A power supply - OCRacing

Why it works for sim racing

A strong stereo amp for small and serious shakers.

The V3 is not only for 50W-class shakers. It also makes sense for stronger 4 Ohm tactile transducers such as Xcite XBS100-4 or Dayton BST-300EX when you want a compact amp with real punch. The important detail is how the number is used: 2x300W @4 Ohm is max output headroom, not a promise of continuous 300W RMS per channel from the included 48V / 5A supply. For sim racing effects, that is still exactly the kind of short-burst power reserve that can make a large shaker feel alive.

01Two clear zones

Run two tactile positions separately instead of blending every effect into one channel.

02From BST-1 to bigger shakers

Works for 50W-class units, but also has useful headroom for Xcite XBS100-4 and Dayton BST-300EX style builds.

03Short-burst headroom

Ideal for tactile effects that hit hard in pulses rather than running as full-power continuous test tones.

04Simple signal path

RCA input makes it easy to feed the amp from a DAC, sound card or dedicated tactile audio output.

Fosi Audio V3 48V 5A package contents - OCRacing

48V / 5A matters

The included power supply is the right version to care about.

The V3 can be supplied in different power versions, but this product is the 48V / 5A setup. That matters because the power supply is a big part of the amplifier’s usable headroom. For tactile use, it means the amp is not fighting a weak supply when short, punchy effects hit the rig.

2x300W max @4 Ohm

Peak output headroom for strong tactile hits, not a continuous RMS claim.

48V / 5A PSU

The included external power supply gives the V3 stronger headroom than lower-voltage bundles.

2-8 Ohm load range

Use suitable speakers or shakers and avoid unsafe wiring combinations.

Logarithmic volume pot

Fine physical control over the output level without changing every software profile.

TPA3255 Class-D platform

Efficient power in a small chassis.

The TI TPA3255 platform is the reason the V3 can stay this compact while still delivering serious output. For speaker use, it gives clean stereo power from a very small box. For sim racing, it gives the punch needed for tactile effects without dedicating half the room to amplifier hardware.

TI TPA3255 Class-D efficiency <= 0.003% THD >= 110 dB SNR

Fosi Audio V3 TI TPA3255 amplifier chip - OCRacing

Fosi Audio V3 heat dissipation design - OCRacing

Fosi Audio V3 internal quality components - OCRacing

Fosi Audio V3 rear input and speaker outputs - OCRacing

Cooling and components

Built to run hard without turning into a bulky amp stack.

Top and bottom ventilation help move heat away from the amplifier stage, while the compact metal body keeps the setup tidy. Inside, the V3 uses quality audio components and swappable dual op-amps for users who like to tune their sound signature later.

Signal and outputs

Simple RCA in, speaker output and pre-out.

The V3 keeps the signal path straightforward: RCA input, passive speaker binding posts and a pre-out. There is no Bluetooth and no tone-control layer to overcomplicate the setup. That makes it a clean amplifier for a dedicated input device, whether that device is a DAC, PC sound card or sim racing tactile output.

Fosi Audio V3 RCA input, speaker outputs and pre-out - OCRacing

Setup workflow

Set it up cleanly, then tune the effect.

A powerful amplifier can make a tactile rig feel precise, but only when the wiring and effect levels are under control. Mount the shakers firmly, label the left and right channels and increase output in small steps.

1Choose two zones

Common starting points are seat left/right, pedal tray plus seat, or front and rear tactile feedback.

2Wire the load correctly

Keep the final load within the 2-8 Ohm range and use proper speaker cable for the run length.

3Start with low gain

The V3 has more headroom than many shakers need at full tilt, so tune by feel instead of chasing volume.

4Save the profile

Once road, kerb, shift and ABS effects feel separated, save the profile before experimenting further.

Fosi Audio V3 desktop Hi-Fi setup - OCRacing

Not only for shakers

A compact stereo amp for passive speakers too.

Outside sim racing, the V3 is a clean little amplifier for passive bookshelf or desktop speakers. It is a good fit when you want real speaker terminals, a physical volume knob and a small footprint instead of a full-size receiver.

What’s in the box

The 48V / 5A bundle.

The package includes the Fosi Audio V3 amplifier, 48V / 5A power adapter and user manual. Speakers, bass shakers, RCA cable and speaker wire are selected separately based on your setup.

Technical overview

Fosi Audio V3 specifications.

Product	Fosi Audio V3 2.0 Stereo Amplifier
SKU	V3
EAN	6976136960225
Amplifier type	2.0 channel Class-D stereo amplifier
Amplifier chip	TI TPA3255
Max output	2x300W @4 Ohm
Supported impedance	2-8 Ohm
Input	RCA
Outputs	Passive speaker outputs, pre-out
Frequency range	20 Hz – 20 kHz (+/-0.1 dB)
SINAD	88 dB
THD	<= 0.003%
SNR	>= 110 dB
DC input range	24-48V
Included power supply	48V / 5A
Dimensions	approx. 166 x 105 x 35 mm
Included	Amplifier, 48V / 5A power adapter, user manual
Not included	Speakers, bass shakers, RCA cable and speaker wire

Small box, serious two-channel headroom.

A strong stereo amp for small and serious shakers.

The included power supply is the right version to care about.

Efficient power in a small chassis.

Built to run hard without turning into a bulky amp stack.

Simple RCA in, speaker output and pre-out.

Set it up cleanly, then tune the effect.

A compact stereo amp for passive speakers too.

The 48V / 5A bundle.

Fosi Audio V3 specifications.

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