S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS)

Powered off of my 24v lifepo4 battery in my semi truck. Pushes the highs at 2ohm and a kicker comp 10 150w rms 4ohm real nice. Sub is in passenger floor in front of seat, can feel and hear the bass very nicely. I will probably upgrade to the metal encased version in due time, but works good for me.

Does good, with proper power!!! This things a beast

I am totally blown away that something so small can put out so much sound. I have purchased several of these in various sizes for my projects. In my experience with amps i have never seen anything like these. They can plug into accessory plugs in car and the supply cord don't even get warm. Amazing. Anything compatible so far would have to have a supply wire the size of little finger and still get hot. Easy to install and top value for the money. Get a handful of them, you'll find a use for them. They can fit in multiple places because of the compact size and light weight. Controls are easily accessible and sub control is convenient.

Cons: Don't use the bluetooth features, you need an app and the functionality is absolutely limited. It's barely usable to control volume. Pros: Ignoring the lackluster BT connectivity capability, this amp packs some serious power. I'm using a pair of JVC 20W bookshelf monitors, and a pair of 400w JBL 10" subwoofers. Coupled with a 36V 30A power supply, this little amp has had absolutely no problem making my walls shake. I don't need to turn it up more than a few clicks, and it's loud enough to hear across the whole apartment. It's so small that all of my other electronics in the same cabinet dwarf it by far, with the humble Wii being about 3-4x bigger and it's the smallest console in the cabinet. That lacking BT connectivity knocks off a star. Otherwise it is a decent product.

This little amp can put out some good sound. I used this with my old Bose cube speakers, got 4 of them hooked up and a subwoofer.. for the price and sound it’s totally worth it. Wish it was 5+1 though, that would be awesome. But it works well for the price! I can’t find an app for this unfortunately.. I thought there was one, but I searched everywhere and found nothing. Oh well

Gave it 5 months of use before doing a review. Powering a Skar EVL6.5 and a pair of Polk 3.5 all with home brew boxes. Bluetooth has never had problem. Power is good. Sound quality is good. Volume/level controls are not super linear, but work. It's fan can be a bit loud, as loud as my laptop fans at idle and the top plate vibrates sometime. Haven't put much thought into a good remedy, should be an easy fix, maybe orings..

Sub channel doesn't actually play low pass frequency you can hear vocals and is very lacking in power even at 40 volts it can't put out much. It's almost like it just a 3rd speaker channel they tuned the treble out adjustability isn't amazing either though the speaker output is good the sound from the sub is bad and the whole unit resonates and makes horrible noise if u were playing on mounting this to a diy bt speaker its a no go. Not worth the money or time I wasted.

only after reading the manual found out why BT connection didnt work. need to disconnect audio cable input and USB drive according to manual. even at low volume the tiny fan runs constantly. used a 24VDC 5A power supply. just using subwoofer output and 6 inch 4ohm and playing hiphop. I never listen to rap or hiphop, but when I feel like listening to low-vol bass in the kitchen... this amp did it for me. ever-slightly thumping only for the room. just wanted bass, no music. fine tuning sub freq and sub-vol is just simple-basic. if cranking up vol you will get some distortion and flutter of small woofer. 6inch woofer at about 75 percent vol and Im enjoying my time of non-music audio. woofer I used is actually 12 years old and its a name brand. sounds pretty good. for the price Im glad I bought this. really satisfied for bass listening for 1room, low volume. really nice. many years ago I had like 800W amp and dual 10inch subwoofers for the car. those days gone

You can see that it was pulled out of something and there was one screw missing and it was all loose and the smell is also not what it should be. The Master Vol potentiometer also does not work as it should. It does not always want to turn on the first time