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The Fosi Audio HT4S is a versatile 4-channel power amplifier engineered to bring immersive surround sound to smaller living spaces, gaming setups, and media rooms. Designed with a focus on high-density power and simplified control, the HT4S allows you to drive four passive speakers simultaneously, making it the perfect foundation for a 4.0 or 2.1 channel system.
TPA3116 Multi-Chip Architecture: Utilizing dual Texas Instruments TPA3116 chips, the HT4S delivers a clean 50W x4 (4 ohms) of power. This ensures each speaker receives a dedicated, high-fidelity signal for a balanced soundstage.
Flexible Configurations: Easily switch between a traditional 4-speaker setup or use it to power front and surround channels in a hybrid home theater environment.
Dual Volume Knobs: The front panel features independent volume controls for the front and rear (or left/right pairs) channels. This allows you to perfectly balance the surround levels based on your room's acoustics and seating position.
Independent Power Management: Designed for reliability, the internal circuitry minimizes crosstalk between channels, ensuring that high-impact scenes in your movies remain clear and undistorted.
Aviation-Grade Aluminum: The sleek, black anodized aluminum chassis provides excellent heat dissipation, ensuring the amp stays cool even during extended movie marathons.
Gold-Plated Terminals: High-quality binding posts ensure a secure, low-resistance connection for your speaker wires, preserving every detail of the audio signal.
| Component | Specification |
| Power Output | 50W x4 @4Ω |
| Amp Chip | Dual TI TPA3116 |
| Input Mode | RCA Unbalanced |
| Output Mode | Passive Speakers (4 Channels) |
| THD / SNR | ≤ 0.03% / ≥ 98dB |
| Terminating Impedance | 2Ω - 8Ω |
| Power Supply | 24V/4.5A |
The Fosi Audio HT4S solves the problem of bulky, expensive AV receivers for users with space constraints. It offers a streamlined, pure-analog path to multi-channel audio, focusing on raw power and sound quality. Whether you are upgrading your TV audio or building a dedicated gaming station, the HT4S provides the muscle needed for a truly cinematic experience.
All-in-One
FosiAudioHT4SMulti-Channel
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.
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, Bluetooth. Output: 3.5mm Pre-Out, Passive Speakers+Subwoofer
· Rated Power Output: 4.1 Channel: 30w*4+60W*1 @4Ω; 5.0 Channel: 30W*5
· Max Power Output: 50Wx5 @4Ω
Allowing you to effortlessly restore the original sound when adjusted to thecenter position.
Adaptable to 5.0 or 4.1 channel audio setups indoors or outdoors.
Providing strong vibrations to add a new level of immersion to your
gameplay.
Allowing you to experience a 360° immersive sensation in the world of racing games.
Providing sufficient power output and ensuring pure sound with great
clarity and separation.
Long press to power the device on/off, short press to switch input modes
and volume adjustment.
In FLAT mode, the SUB/CEN channel outputs full-range audio signals, while in SUB mode, it outputs low-frequency signals from 20 to 300Hz.
Input modes are color-coded for easy use: blue for Bluetooth, orange for AUX, and red for OPT, to enhance the intuitiveness of operation.
Provides functions like device power on/off, input mode switching, one-touch mute, etc., offering greater convenience.
Constructed with a full metal casing, CNC machined, finely sandblasted for a simple yet durable and rugged design.
The Fosi Audio HT4S is designed to deliver a true multi-channel cinematic experience without the bulk of a traditional full-sized receiver. It supports a 4.1 channel output configuration, allowing you to drive front and surround speakers plus an active subwoofer. This makes it the perfect centerpiece for users who want to create an immersive surround sound environment in smaller living rooms, bedrooms, or dedicated media pockets.
Absolutely. Most modern slim TVs have integrated speakers that lack depth and clarity. By connecting your TV to the HT4S via Optical, Coaxial, or Bluetooth inputs, you can bypass the TV’s internal audio and utilize high-fidelity amplification. This significantly enhances dialogue clarity, widens the soundstage, and provides the dynamic impact needed for action movies and immersive gaming.
Yes, the HT4S is equipped with high-definition Bluetooth connectivity. This allows you to seamlessly switch from watching movies to streaming your favorite playlists from a smartphone, tablet, or laptop. The external antenna ensures a stable, long-range connection, providing a convenient way to enjoy high-quality wireless audio across all your connected speakers.
The HT4S features a dedicated active subwoofer output. By connecting a powered subwoofer to this port, you can offload the demanding low-frequency tasks from your main speakers. This results in a much more balanced sound where your bookshelf speakers handle the mid-to-high frequencies with precision, while the subwoofer provides the deep, cinematic bass that brings movies to life.
Yes, simplicity is one of the HT4S's strongest features. Unlike complex AV receivers that require extensive menu diving, the HT4S offers a straightforward, plug-and-play interface. With clearly labeled speaker terminals and intuitive front-panel controls for volume and input selection, you can have your multi-channel sound system up and running in minutes, making it an excellent choice for those new to home theater setups.
