ZK-TB21 High Power Amplifier Board 2.1 Channel Bluetooth Digital Amplifier Board

Do it yourself assembly. Fun, and functional. Thanks!

Has the power it offer for it sound.

Really love this product. It is capable of a lot and has everything you need to get it bumping right away. Sound is crisp and it does not even heat up. The only downside is that in order for the Bluetooth to be fully disconnected, you have to disconnect the device from the power. Even if it's off, it will still be connected to the Bluetooth.

This is an exact replacement of the buystuffarcade amp for the Legends pinball machine.

Only had this amp since the beginning of September and it's already stopped working. Was fine, then statiky nothingness or nothing at all. Power comes on. Guess one of the components failed. A replacement would be nice!! Lol 😂

Esta muy bien, de calidad de audio pasable pero hay que ponerle una fuente de 24 v y 5 Amp para que funcione bien, si se le pone uno mas pequeño distorsiona mucho.

Works really well for the price. Was hard to find a 2.1 amp with a powered sub connection since they all have LFE sub out and cost twice as much as this. Works perfectly, just need to keep the volume knob less than 50% otherwise I get lots of background static. But even at that level, its plenty loud, could be because I'm using 8ohm bookshelf speakers. I love the fact it has individual control for sub freq/vol and L/R treble/bass as well. All these features in an amp this cheap/small is impossible to find these days.

I am happy 😊 these are the best items onbthis platform... really appreciate to the dealrs who are selling such nice products on Amazon. 👏🏻

Works well. Worth the price tag. Can power upto 8 inch sub, frequency selection is roughly 30hz at minimum. Make sure to use a proper 19v or 24v power supply for the grunt. Noise from interference is there a little, more prominent when you dial the volume knob to max. But that's expected from bareboan amp boards like this. Make a proper chassis and ground it and we should be sorted with noise then. Choose soft tweeters has the treble can get harsh if dialled up. Mids and bass sounds slightly damped. But overall thisnis a great amp for small bookshelf and desktop speakers. Not sure about durability, which only time and usage style, care and luck will tell. Cheers!

Impressed with the power it puts out. Used it for a diy Bluetooth speaker. Bluetooth connection is easy and goes a long way.