---
product_id: 657411224
title: "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"
brand: "fosi audio"
price: "₩464911"
currency: KRW
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.kr/products/657411224-ht4s-bluetooth-amplifier-4-1-5-0-ch-stereo-outdoor
store_origin: KR
region: South Korea
---

# Bluetooth + AUX + Optical inputs 120W clean power output 5-channel switchable stereo modes 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

**Brand:** fosi audio
**Price:** ₩464911
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your soundscape—because your audio setup deserves to be as ambitious as you are.

## Quick Answers

- **What is this?** 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 by fosi audio
- **How much does it cost?** ₩464911 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/657411224-ht4s-bluetooth-amplifier-4-1-5-0-ch-stereo-outdoor)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Powerful yet Compact:** 120 watts of crystal-clear audio packed in a sleek aluminum chassis—unleash rich sound anywhere.
- • **Seamless Connectivity:** Effortlessly switch between Bluetooth, AUX, and optical inputs for versatile, modern setups.
- • **User-Friendly Control:** Remote control with bass/treble adjustment and LED indicators makes fine-tuning your sound a breeze.
- • **Durable Minimalist Design:** CNC-machined aluminum alloy body combines premium durability with a clean, modern aesthetic.
- • **Immersive Multi-Channel Sound:** Supports 4.1 and 5.0 channel modes to elevate your outdoor speakers or sim racing cockpit experience.

## Overview

The Fosi Audio HT4S is a versatile 4-channel Bluetooth amplifier delivering 120 watts of power with support for 4.1 and 5.0 channel stereo modes. Designed for both indoor and outdoor use, it features Bluetooth, AUX, and optical inputs, remote control with tone adjustments, and a durable CNC-machined aluminum alloy body. Ideal for enhancing outdoor speakers, sim racing cockpits, or home theater setups, it offers immersive sound with easy operation and a sleek, minimalist design.

## Description

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 : desertcart.in: Electronics

Review: Compact, Powerful & Crystal Clear! - The Fosi Audio HT4S is a fantastic little amplifier with rich, detailed sound and strong Bluetooth connectivity. It delivers clean highs, solid bass, and more power than you’d expect for its size. The build quality is premium, setup is easy, and it runs cool even after hours of use — provided you pair it with good speakers.
Review: Fosi audio HT4S amplifier - This is a very good amplifier machine, it is very strong, the sound is really crystal clear, for those who think that the sound is low I would like to tell them that they should play it with an equalizer app, it will shake your house, this amplifier plays my 12" inch woofer very well

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CYQ1B598 |
| Audio Wattage | 120 Watts |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #27,334 in Electronics ( See Top 100 in Electronics ) #25 in Hi-Fi Amplifiers |
| Brand | Fosi Audio |
| Country of Origin | China |
| Customer Reviews | 4.0 4.0 out of 5 stars (270) |
| Date First Available | 20 August 2024 |
| Generic Name | AMPLIFIER |
| Importer | support@fosiaudio.com |
| Item Dimensions LxWxH | 15.5 x 18.3 x 5.1 Centimeters |
| Item Weight | 1 kg 570 g |
| Item dimensions L x W x H | 15.5 x 18.3 x 5.1 Centimeters |
| Item model number | HT4S |
| Manufacturer | Fosi Audio |
| Material | Made entirely of aluminum alloy |
| Maximum Supply Voltage | 230 Volts |
| Model | HT4S |
| Mounting Hardware | HT4S Bluetooth Amplifier |
| Mounting Type | Freestanding |
| Number of Channels | 5 |
| Number of items | 1 |
| Operating Temperature | 20 Degrees Celsius |
| Output Power | 400 Watts |
| Package Type Name | Box |
| Packer | support@fosiaudio.com |
| Product Dimensions | 15.49 x 18.29 x 5.08 cm; 1.57 kg |
| Specification Met | FCC |
| Voltage | 230 Volts |
| Wattage | 250 Watts |

## Product Details

- **Item dimensions L x W x H:** 15.5 x 18.3 x 5.1 Centimeters
- **Manufacturer:** Fosi Audio
- **Maximum Supply Voltage:** 230 Volts
- **Mounting Type:** Freestanding
- **Voltage:** 230 Volts

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51Iqgx-WUaL.jpg)

## Questions & Answers

**Q: Q: HT4S Default Blue Light, Manual Mode Switch Required After Powering On**
A: Upon powering up, the indicator light will turn blue (indicating Bluetooth mode by default). You have to switch modes manually.

**Q: Q: HT4S Indicator Lights for Input Modes**
A: Input modes are color-coded for easy use: blue for Bluetooth, orange for AUX, and red for OPT.

**Q: Q: Does the HT4S Have a Standby Function?**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Compact, Powerful & Crystal Clear!
*by A***O on 18 October 2025*

The Fosi Audio HT4S is a fantastic little amplifier with rich, detailed sound and strong Bluetooth connectivity. It delivers clean highs, solid bass, and more power than you’d expect for its size. The build quality is premium, setup is easy, and it runs cool even after hours of use — provided you pair it with good speakers.

### ⭐⭐⭐⭐⭐ Fosi audio HT4S amplifier
*by P***. on 3 January 2025*

This is a very good amplifier machine, it is very strong, the sound is really crystal clear, for those who think that the sound is low I would like to tell them that they should play it with an equalizer app, it will shake your house, this amplifier plays my 12" inch woofer very well

### ⭐⭐⭐⭐ 2 months usage review
*by S***. on 8 December 2025*

Believe that an amplifier can turn old Sony home theatre speakers alive. The original Sony system stopped working due to motherboard issue and it being some 15-16 yrs old could not be repaired. After several research and review finally bought this amplifier. Gambling 10k on this and went ahead. Have been using daily for 12-15hrs (TV usage) and there has been no issue. Listening to music has been pretty good. One issue I faced was buzzing sound after around 15 days when connected via bluetooth and Airtel set top box however with mobile that sound was not coming. So it might be the issue with the set top box itself. Currently TV and amplifier are connected with 3mm cable and has no lag in picture and speaker.

## Frequently Bought Together

- Fosi Audio HT4S Bluetooth Amplifier for Outdoor Speakers, 4 Channel Power Amp for Home Theater, Outdoor Gathering, 4.1/5.0 Ch Stereo Home Audio Receiver, Supports AUX/Optical Input with Remote Control
- Banana Plugs with Dual Set Screws,Black and Red Aluminum Shell,6 Pairs
- Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System

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**Shop now:** [https://www.desertcart.kr/products/657411224-ht4s-bluetooth-amplifier-4-1-5-0-ch-stereo-outdoor](https://www.desertcart.kr/products/657411224-ht4s-bluetooth-amplifier-4-1-5-0-ch-stereo-outdoor)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-14*