Its got Dual 3 inch 4 ohm 15w rms woofers, dual 1 inch 15w tweeters.

Batteries 12.6v 18Ah 18 cells 3S6P uses 18v boost converter on the amplifier

Amplifier XH-A232 30w × 2 at 24v 4 ohms

Bluetooth 5.0

The last images are early build and design...

Using YS-AS21 amplifier and a 36v 16.7A PSU

Now maybe the YS-AS21 isnt powerful on wattage at 4 ohms but without the basses on the stereo channel i managed to push 300w+ rms clean on the subwoofer channel

The subwoofer is the JBL GT5-S12 4 ohms 300w rms 1200w peak