AIYIMA DC12V-24V 2.1 Channel TPA3116 Bluetooth-Compatible Stereo Subwoofer Amplifier Board 2x50W+100W BT Audio Amplifiers Board with Sub

So simple to wire up. Built my own blue tooth system - sound quality is great. Slight hiss at lower volume but for workshop/gym use - perfect. Crackles if not earthed, but once fully wired in, faultless. More on order for ceiling mounted speakers. Cheap and simple way to BT the whole house.

I've been running this for a week or so. It produces a good (adjustable) sound (shows how good your speakers are or ain't), connects by bluetooth easily, and is excellent value for money. Will report back if it lasts (or not)...

Sounds great, but in a vehicle you'll need to feed this more than the 12-14V your batteries or alternator provide as you will get a clipped output for the sub. I bought a heavy duty DC-DC boost circuit set to 24V.At high volumes, when the Bluetooth is connected the blinking blue LED introduces a high frequency noise.

sound output is very good.

Like other reviewers said (I should have believed them...):This amp is very noisy. It has a sort of noise suppression system, where the sound cuts out completely at low (or no) input, probably to mask the hiss you get while it IS producing output. I tried different power supplies, including a bench power supply at different input voltages. No difference.Also annoying is that it powers up in Bluetooth mode, you have to manually switch it to LINE IN every time - if that is how you want to use it. And it gives an annoying bleep on power up, AND speaks "line in" on switching to the line input.I got this amp to replace an old, equally cheap (LEPY?) 12V amp which did not have a subwoofer out. The old amp is now back in place. It does NOT hiss. This one is rubbish.

The media could not be loaded. Excellect Amp powering a pair of Q Acoustic speakers. Decent sound qualityCurrently in a used Chinese Take Away box, but have ordered the official case from AliExpress :-)Playing music from an amazon dot whose speaker had failed. Using bluetooth output

The media could not be loaded. Song featured: “Collide” by SkylikeIt’s brilliant for flexibility for small speakers (featured in the video) and large speakers but at very low volumes, there is a noticeable hissing sound, even with the line input disconnected and on Bluetooth mode.Also the instructions are misleading. The main volume control knob button doesn’t actually do what it says it does in the instructions. If you press the button once, you switch between Bluetooth and line in. If you press and hold for a second, it will power off the unit, but then you won’t be able to power back on until you disconnect the power supply and wait for about 30 seconds before reconnecting.

No distortion, very loud and well made