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
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Availability:
20 left in stock
Arrives
Sunday, Aug 3
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 aesthetic
Item dimensions L x W x H: 6.1 x 7.2 x 2 inches
Voltage: 230 Volts
Manufacturer: Fosi Audio
Brand: Fosi Audio
Number of Channels: 5
Product Dimensions: 6.1 x 7.2 x 2 inches
Item Weight: 3.61 pounds
Item model number: HT4S
Date First Available: March 21, 2024
Manufacturer: Fosi Audio
Language: English
Country of Origin: China
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 3
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Nice 4 channel amp. Use with BT and an iPhone plus 4 in ceiling speakers.
Reviewed in the United States on May 27, 2025 by Amazon Customer
TLDR: If you're looking for a beautifully built, excellent sounding bluetooth amp this is the one. It excels in audio clarity with little to no distortion at high realistic listening volumes, offers multiple audio input modes that you can select between with a convenient remote, and has the most output channels of any bluetooth amp for this price point. An absolute MUST BUY for any one in the market for a small nice amp. Right out of the gate, this new Fosi Audio bluetooth amp is absolutely amazing. The build quality and design are top notch given the price of this amp. Really hard to beat especially when compared to other similarly priced amps on Amazon. Rated at max power of 50watts per channel at 4ohms, this thing has enough power to realistically handle any speakers you throw at it given its use case. I tested these on my Wharfedale Evo 4.2 bookshelf speakers (these are no slouch!) and WOW what a difference in audio quality over my $1k Denon AVR for music. The DAC on this bluetooth amp is shockingly very clear and defined, definitely ideal for music. Added with the tone controls on the front of the amp, this amp is more versatile than ever. I've got 2 other models of Fosi Audio amps, and this is by-far superior to the other older models that I've got. It's got much better clarity and doesn't distort at higher volumes in comparison to the TB10D that I have. One of my favorite improvements over the previous model bluetooth amps from Fosi is that this new HT4S model has the ability to select your audio input mode. I can now swap between bluetooth on my phone for music and optical/aux in from the TV/Apple TV. On my older bluetooth amp from Fosi it was an on/off switch control and that was it. Both bluetooth and aux were active at the same time. So if I was watching something via the TV somebody else could bluetooth freely and play music over my TV audio which was very frustrating. With this new HT4S model that issue is now gone and the beautiful LED light bar on the front panel displays which audio mode you're currently in by changing colors.
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Reviewed in the United States on September 4, 2024 by Kenny Vannavong Kenny Vannavong
Bluetooth connects quickly and works fine. This amp will be used in my garage, and I have concern that there is no fan in the unit. We'll see how it does during the summer months. For now, I just have a couple of Klipsch SB2 bookshelf speakers. The sound is decent, base and treble are fine, but the volume is pretty "meh". At high volume there is little distortion, but my ears aren't what they used to be. The setup will be fine but I'll likely update the amp at some point. My speakers have a lot more capability than what this amp can provide. All in all, for the money, not a bad unit.
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Reviewed in the United States on February 23, 2025 by Rob&Glo
Sounds great! I love the fact it has a remote and an internal power supply. These items make it much more usable.
Reviewed in the United States on May 1, 2025 by CDScott
Sounds really good, but not as powerful as I hoped. I’m powering four outdoor rock speakers, at its highest volume it leaves a lot to be desired. My back yard isn’t very big and I have the speakers pointing at the pool from fifteen feet away. Other than that hookup was a breeze and the Bluetooth has great reach.
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Reviewed in the United States on May 20, 2025 by These are garbage. Collapsed as soon as I turned the pump on.
Do not buy for sim racing setup. I don't understand, they have a photo of a sim setup with multiple bass shakers but it won't work for mora than 2 channels. Bluetooth only shows 2 channels and optical the same. Not sure why it says it's 4.1 channel when it's not. It just takes 2 channel audio and duplicates it.
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Reviewed in the United States on April 28, 2025 by Daniel Barreto
We ordered this for our outdoor sound system. Can’t ask for better quality at this price point! Set up was easy and it is holding up to the SW summer heat. It works exactly as advertised and doesn’t take up too much room!
Reviewed in the United States on April 18, 2025 by Jen
This product is a bit of a dud. They try to label it as for home theater, 4.1 audio but it only accepts stereo audio. So if you plug it to your tv, play Netflix etc, your “surrounds” will basically be the exact same as the fronts. It’s really 2.0 at that point, if your tv only has 2.0 pcm, the subwoofers are incredibly weak. Just double set of front speakers and weak bass signal. That’s why this product is a dud, it only suits very niche scenarios. It outputs stereo but across 4/5 speakers? Can’t imagine it for a restaurant unless you want half your speakers playing different things than the other. Definitely not home audio which is what I was excited for. Can’t replace a receiver. Maybe just for that race game thing they show.
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Reviewed in the United States on August 13, 2024 by david li