Not too much to see here, Bluetooth module and its antenna, AK7755EN DAC and various power supplies and the output filters for the amplifier. A DC-DC boost converter supplies higher voltage for the amplifiers.

Under the heatsink lies 2 TPA3116D2's that I believe are running in PBTL.

Here's where it gets complicated and long-winded. The speaker has 2 operating modes. Battery and AC power, Which is a 19V 2A brick. When running on battery supply voltage bounces between 7V-10V when measured at pin 32 of the TPA's. When plugged supply voltage sits at a much more stable 12V.

The DAC also implements an aggressive compressor when on battery power. Power AT THE WOOFER on battery was 5.9V which comes to 17.5W into 2 Ohms. When plugged in voltage jumped to 9V, which at 2 ohms is 40.5W! I didn't power test the tweeter, but I'm going to guess battery is around 3W-5W and plugged in is around 10W.