Fosi Audio HT4S Bluetooth Amplifier 4.1/5.0 Ch Stereo for Outdoor Speakers, 4-Channel Power Amplifier for Bass Shaker Sim Racing Cockpit, Support AUX/Optical Input with Remote Control
Price: ₹13,999 - ₹10,750.00
(as of Jan 19, 2026 17:57:33 UTC – Details)
Product Description
All-in-One Fosi Audio HT4S Multi-Channel Integrated Power Amplifier
Easily handle various audio inputs and outputs, providing up to 5 channels of output for seamless integration and flexible configurations to meet diverse audio needs.
Designed for Multi-Speaker Scenarios and Sim Racing Gaming
The built-in power supply design achieves minimal footprint, and the front panel indicator light adds a sense of atmosphere; whether it is simulator racing, patio parties, or immersive movie watching, The HT4S integrated amplifier is your ideal choice.
Input: 3.5mm AUX, Optical, BluetoothOutput: 3.5mm Pre-Out, Passive Speakers+SubwooferRated Power Output: 4.1 Channel: 30w*4+60W*1 @4Ω; 5.0 Channel: 30W*5Max Power Output: 50Wx5 @4Ω
1 Bars and Pubs
2 Home Audio
3 Yards and Gardens
4 Family Gatherings
5 Coffee Audio
Enhance the Realism of Racing Simulator Gaming
Providing strong vibrations to add a new level of immersion to your gameplay.
Supports Connection to Up to 5 Bass Shakers
Allowing you to experience a 360° immersive sensation in the world of racing games.
Max Output Power 50W*5
Providing sufficient power output and ensuring pure sound with great clarity and separation.
Integrated Functions of Infinite Rotation
Long press to power the device on/off, short press to switch input modes and volume adjustment.
1 Sim Racing Setup
2 Drives 5 Bass Shakers
3 Dual TPA3116
4 Multi-Functional Knob
Customize Your Favorite Sound Signature
Allowing you to effortlessly restore the original sound when adjusted to the center position.
For Flexible Multi-Channel System
Adaptable to 5.0 or 4.1 channel audio setups indoors or outdoors.
1 Tone Controls
2 Multiple Outputs
3 Front Panel
4 Rear Panel
User-Friendly Design 
Q: HT4S Default Blue Light, Manual Mode Switch Required After Powering On
Upon powering up, the indicator light will turn blue (indicating Bluetooth mode by default). You have to switch modes manually.
Q: HT4S Indicator Lights for Input Modes
Input modes are color-coded for easy use: blue for Bluetooth, orange for AUX, and red for OPT.
Q: Does the HT4S Have a Standby Function?
The HT4S has no standby function. You can leave it powered on continuously. If you turn it off, you have to long-press the main volume knob for 1.5 seconds to activate the HT4S amplifier.
All-in-One Amp: A mini amplifier that integrates DAC and power amplification. This stereo amplifier supports up to 5 channels output, switchable between 4.1 and 5.0 channels. It features Bluetooth, AUX, and optical digital inputs, along with pre-out and support for up to 5 speaker outputs. Note: The HT4S is a stereo amplifier and does not support Dolby, DTS, or other multichannel surround sound modes
Multi-Scenario Solution: Ideal for pairing with outdoor speakers or wall-mounted speakers, perfect for setting up 2 to 5-channel audio systems in environments like patios, cafes, restaurants, bars, etc. It can also serve as a home theater or desktop HiFi system amplifier, meeting your diverse needs from indoor to outdoor settings
Enhanced Immersion: Take your sim racing and home theater experience to a whole new level! By pairing with bass shakers, its sufficient power output and bass boost help significantly enhance the realism of racing simulator games. When watching movies at home, the vibration feedback can also help you experience your movies in another dimension, making every movie feel more realistic like being in a cinema
Effortless Operation: Featuring a comprehensive user-friendly design with a built-in power supply, accompanied by remote control, supporting bass and treble tone adjustment, a multifunctional central knob for volume control, powering on/off and mode switching, LED mode indicator ambient light, etc. Enjoying music has never been easier
Elegant and Durable: Continuing Fosi Audio’s tradition of an all-aluminum alloy body design, the CNC unibody construction and fine metal sandblasting process highlight a minimalist aestheticIf you encounter problems during use, please refer to our manual or contact our after-sales team, and we will have professionals to answer your questions
