If you're looking for a solid bluetooth capable speaker amp to run some outdoor speakers (amp is kept indoors of course), look no further than the HT4S. Works a treat!

Hooked it up to my turntable via aux, television via optical and the Bluetooth is open for my phone or any other device running a 2.1 system for now provides great power and makes my turntable sound amazing which is also going through a fosi p2 phono preamp. Control could be better but I can’t complain makes switching inputs a breeze

Extremely easy to hook up, also was very impressed with the amount of sound it puts out. You cannot beat the value. 👌

Great Bluetooth/amplifier for my needs, perfect for outdoors and vasatile as an indoor amp. Very pleased with this purchase simple and easy to set up and it looks good. Highly recommend this unit.

A unique, well built and practical solution to a number of specific applications. It’s now driving 4 garden speakers and buried sub. Nothing out there with such quality components.

Fosi Audio HT4S 4.1/5 Channel Bluetooth Amplifier

Using it to power 5 bass shakers and works excellent!

I am beyond impressed, using this on a pair of KEF Q150s, they have never sounded better.

I wanted a stereo digital integrated amp with a phono input, 1 line input, 1 optical input, bluetooth, headphone output and subwoofer output with a remote but had to settle for this HT4S. It's a solid performer that sounds good. It's a fine, fine product. I don't like the orange knob. It should have been silver gray. Better yet make that big knob opaque and put a color changing LED light behind it and let the customer choose the color of the light they would like on the volume control knob. As soon as I can find the integrated amp I mentioned earlier for $300 or under, I'm selling this one on ebay and buy the other.

Great product and even better support, can't recommend enough

Clean sound.
Great for movies, Youtube, and music.
Optics still needs to be tested to see if audio quality is 'fuller'
Bluetooth signal strength is impressive. A proper 5m distance with two walls between device and amp. Not a beat missed.

I love the way the amp and looks. I think this is a great amp for home uses. I need it for 3rd party uses in vacation homes where guest can access it and not actually touch it. I needed it for 2 zones to play the same source and stay set to Bluetooth even if the power goes out comes back on. A physical switch would be great to lock it in to Bluetooth only mode. Also, it someone is connected to it and leaves the area, it will release their device and allow it for others to find it and connect to it.

I have not installed it yet at the place where it will be used, but I plan on using a IR/RF remote system to reset the amp back to Bluetooth incase it resets. This is an added cost, but it is the only way I know to work around this issue, providing the amp allows a 3 party IR system to control it.

Overall, for home use, I think this is a great amp and the remote that comes with it is a nice feature.

Power is bit low or not i donno, some audio i feel low output even at full volume

Very good

👎🏻Very weak power,
👎🏻Came a week or two late,
👍🏻Perfect build quality,
👍🏻Small and stylish,
👍🏻Remote control,
👍🏻Connectivity toslink,aux,bluetooth.

Fosi Audio HT4S Bluetooth Amplifier for Outdoor Speakers, 4 Channel Power Amp for Bass Shaker with Remote Control

Best in class 5.1 channel Amplifier.

Works great. I connected an active subwoofer and a working feeder. I put high quality speakers and the sound is excellent

I hooked this up to the 4 Advent speakers that I have hooked up in my office. Sounds great - lots of power! I don't have a sub-woofer installed so can't comment on that. The only reason I gave it a 4 instead of a 5 is that it was a bit challenging to connect my speaker wires. I have 16 ga. monster cable and there is limited space to connect the wires and the holes are small. I basically had to re-cut and twist each wire so that it would fit in the hole. The connector holes are not as large as a typical receiver. Sounds Awesome though!

- Pros :
Top notch Build Quality
Easy to setup and use
Connectivity options are good
Stereo amplifier
-Cons :
Feels expensive
No dolby support
Every time need to turn on the device manually

For my specific application, the HT4S is the ideal solution: It replaces an older analog Home Theater 5.1 setup with an active subwoofer which was always used in dual stereo mode (rear speakers duplicating the front speaker signal). The HT4S saves a lot of space and is much easier to use than the old amp with dozens of unused connectors and buttons. The color indicator bar is easy to grasp, and the remote control has all the necessary functions. I just would have preferred cinch connectors instead of the 3.5mm jacks for the analog ports. The manual and the description could be a bit clearer about the limitations (no "true" surround sound), and how exactly you should set up an active subwoofer to avoid trial and error.