The Fosi Audio HT4S is a compact integrated power amplifier with 5 channels capable of delivering 30W each thanks to two TPA3116 amplifier chips.
For even more flexibility, the HT4S can alternate between 5.0 and 4.1 modes, allowing you to use it in a full-range 5-speaker configuration or reserve one of the channels for a passive subwoofer. In addition, the HT4S has a pre-out so you can connect an active subwoofer and enjoy a 5.1 surround configuration.
Finally, for even more versatility, the HT4S offers a Bluetooth input in addition to a Toslink optical input and a 3.5mm auxiliary input. As an aesthetic touch, the light strip on the front of the unit changes color depending on the input in use: blue for Bluetooth, orange for the auxiliary input, and red for the optical input.
Fosi Audio HT4S Specifications:
- Product Type: 5-Channel Integrated Amplifier
- Amplification type: Class D
- Gain ICs: 2x TPA3116
- Number of channels: 5.0/4.1
- Inputs: 1x Aux Jack 3.5mm/1x Optical Toslink/Bluetooth
- Outputs: 1x pre-out/5x speaker terminals
- Output power: 5.0: 5x30W 4 Ohm/4.1: 4x30W + 1x60W 4 Ohm
- Output impedance: 4-8 Ohm
- Crosstalk: 79 dB
- Total Harmonic Distortion (THD): 0.03%
- Signal to Noise Ratio (SNR): 88 dB
- Dynamic range: 89 dB
- Noise floor: 350 µV
- Frequency response: 20 Hz – 20 kHz (±0.5 dB)
- Power voltage: 110 – 240 VAC
- Dimensions: 284 x 178 x 100 mm
- Weight: 1.8 kg
- Black color
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