Fosi Audio HT4S 4.1/5 Channel Bluetooth Amplifier

The Fosi Audio HT4S is a compact multi-channel integrated amplifier designed for flexible audio setups, from home theater systems to gaming and outdoor environments. With support for up to 5 channels, it offers versatile performance for immersive multi-speaker configurations.

This all-in-one amplifier combines DAC functionality and power amplification, supporting Bluetooth, optical, and 3.5mm AUX inputs. It can be configured in 4.1 or 5.0 channel modes, allowing users to adapt the system based on their speaker setup and listening needs.

With a rated output of 30W per channel and a dedicated 60W subwoofer channel, the HT4S delivers clear and dynamic sound. It is well suited for enhancing sim racing setups, home cinema systems, or multi-room audio environments.

The unit features a built-in power supply for a clean installation and includes a remote control for convenient operation. Bass and treble adjustments, a multifunction control knob, and LED indicators ensure intuitive control and a modern user experience.

Features
Multi-Channel 4.1 And 5.0 Amplifier Design
Integrated DAC And Power Amplifier
Bluetooth Optical And AUX Inputs
Up To 5 Speaker Outputs
Dedicated Subwoofer Channel Output
Built-In Power Supply Design
Remote Control With Bass And Treble Adjustment
LED Indicator Ambient Lighting
Aluminum Alloy Chassis

Compatibility
Passive Speakers 4Ω To 8Ω
Subwoofers
Bluetooth Enabled Devices
Optical And AUX Audio Sources

Specifications
Channels: 4.1 Or 5.0
Rated Power Output: 30W x4 + 60W x1 @4Ω
Max Power Output: 50W x5 @4Ω
Inputs: Bluetooth 3.5mm AUX Optical
Outputs: Speaker Output 3.5mm Pre-Out
SNR: ≥88dB
THD: ≤0.03%
Impedance: 4-8Ω
Power Supply: AC 110-240V

Dimensions & Weight
Dimensions: 15.5 × 18.3 × 5.1 cm

In The Box
HT4S Amplifier
Power Cord
Bluetooth Antenna
3.5mm Auxiliary Cable
Remote Control
User Manual