Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board TPA3116D2 HiFi Treble and Bass Control Stereo Digital Audio Amp Board for Home Theater DIY Wireless Speakers

Design quality is surprisingly decent. It is not fully enclosed and the sides of the box are open just like the pictures, but the PCB, solder quality, silk screen, etc are all pretty good. Components are obviously not name-brand, but off-brand resistors/capacitors/etc are OK now days it seems like (not sure about long-life though).Bluetooth connection range is OK, reaches through 2 walls in a house at least, but there was a random clicking noise in the bluetooth audio mode even when up close. That's fine for me since I'll be using the 3.5mm jack which doesn't seem to have any audio distortion that my ears can pick up. But I'd be cautions buying this if you plan to use it and use the bluetooth.Power output seems sufficient. They always lie about the "max output" on pretty much all audio equipment, but the same is true for speaker input wattage. I'm running this with about "2x40w rms" car speakers on each channel, 4 total speakers, and it is more than loud enough without clipping, powered through a 20a relay the car battery 13.5v source.

So I've been around for a while and audio is a passion of mine so I don't say this lightly, but this is definitely top 5 things I've ever bought for $20. It's loud , it's clear , it's easy and it's small. Its not that sturdy but but I'm not even docking any points for that... just make sure that you get a 24 V power supply for it that's 5 amps or higher. 5 is the minimum amount. It'll take, but it doesn't say that anywhere on the page here or in the in the description that I can find, so there you go.

I got bored with my desktop Bose PC speaker setup - it’s was good, but not great. I’ve amassed quite the hoard of home theater equipment over the years so it occurred to be that two of my smaller klipsch bookshelf speakers, paired with a passive 10” ported sub by Onkyo (not a good sub at all) might make a decent setup. So I started searching amazon for 2.1 amps and saw the $$$ options, and then this. I’m not that serious about this project so I decided to buy this $20 amp and a cheap UL listed 24v/5a dc power supply. $30 total, shipped.It all arrived today and assembly was easy - except one of the stand-offs for the top lid had stripped out threads so I was only able to get three screws in. Whatever. Everything else when smooth - got everything wired up and plugged in. It worked instantly - BUT you need to keep the source volume louder so you can keep the volume knob low on this amp because anything more than 50% volume and it emits a horrific screech. I thought it was totally broken until I turned up my PC volume and kept the amp at like 10-15%. Zero buzz or hiss with this combo and plenty loud.As far as core functionality is concerned - I’m very happy. It sounds great and has just enough adjustability for the speakers/sub that it’s really easy to dial it in to my exact listening style. We’ll see how long it lasts - but for the money, even with its quirks, I think this is a solid buy.

My buddy gave me some brand new sonance outdoor speakers. I was going to use them indoor as presence speakers but noticed the output and ohm rating were different than my receiver.I decided for $0.18 I couldn’t go wrong. (Used my Amazon points). Anyways, I was shocked after I assembled and wired this amp board up. The speakers sound perfect with no harshness or dropping out. I opted to go with a 24v 6ah power supply to get the full potential.My buddy who gave them to me was shocked by the clarity and the sound the little board produces. It syncs up immediately with the Bluetooth on my iPhone so I’m able to play Pandora outside with crisp clear sound.Can’t wait to buy the buriable bass channel. If it delivers the way the other two channels do then my bass will be digging deep outside too.

Works great and really like the extra treble and base controls plus the sub woofer output.

With 24v power supply it puts out! I have not tried the sub output yet.

Have it powering 4 Klipsch surrounds wired parallel and 2 6x9s hooked to the sub out. Sounds great in the garage.

Awesome for the price! I have a passive 2.1 system from ages ago that this powered very well, and it was able to power my subwoofer louder than I wanted it which I can't say about more expensive ampsThere was a low buzz when the volume was turned up without anything playing, so this would probably be best suited in a garage, but for under $30 I was still very impressed