ZK-TB21 Bluetooth Amplifier Board,50W+50W+100W 2.1 Channel Subwoofer Amp Board with Treble and Bass Control,DC 12-24V, Bluetooth and AUX Inputs, DIY Wireless Speakers AMP Board, Password Free

Works great! Using a 20V Black and decker electric trill battery for thesupply voltage. Using Dual LU43PB speakers, nice sounding system

I recently purchased this Bluetooth amplifier receiver, and overall, I'm quite impressed! The sound quality is excellent, providing clean and clear audio for my speaker build. Pairing it with my devices was a breeze, and the Bluetooth connectivity is stable from 100 feet or so away!!!

This thing has been wonderful! I have it looked up to some bookshelf speakers for my PC and just do Bluetooth, have not had any latency issues exc. Very solid!

Just set this up about an hour ago. Just putting it together was worth the price. Super simple and straightforward.I'm powering it with 15v 6.33a which is enough to make get the zk-tb21 to sound really nice once I got the equalizer on it dialed in.The Bluetooth seems good to me, I've had it playing for about 90 minutes and no drops.That's like 1980s prices for an Amp. I'm in. Sounds nice

The media could not be loaded. Powered with a 24 volt 10 amp medical grade power supply it keep shutting off. Thought this was odd so I just tried it with a 16 volt battery pack I had and same thing. I wonder if this is not amperage limited or something. Not too happy. The Dayton audio speaker are only like 20-30 watts each. Sound quality nice but don’t expect too much volume.

Works wonders my husband used this to make a speaker great price great quality. Can’t beat it .

Buen producto para su precio trabaja bien el bluetooth conecta rapido y facil de instalar recomendado para tu proyecto em calidad de sonido tiene un 6 probado a 12v y 20v

It very loud