Very Basic 2.0 Speaker System w/ Bluetooth

This is a very basic speaker system that I've designed. It can take both aux and Bluetooth input. I do not have a background in audio engineering, just thought I'd share.

Parts List:
1x AMP: OEP30Wx2
2x Speaker: Salvaged from broken Google Home (Peerless pls-50n25al07-04)
1x 19v Laptop Power Supply
12x M3x10 machine screws
4x M2x8 machine screws
1x USB Powered Bluetooth to 3.5mm audio.
1x Voltage step down module
5x 3.5mm female AUX jack
1x B505S-1W 5v power supply isolator.
1x 2.5mm DC barrel jack
1x push switch
1m of wire
1x Breadboard