Audio System

This would be a fun build

• Bluetooth receiver module:
• 2 x Audio Amplifier Module
• 2 or 4 x Audio Exciter : https://www.parts-express.com/dayton-audio-daex25fhe-4-framed-high-efficiency-25mm-exciter-24w-4-ohm--295-224

Put the electronics in a box, the speakers are based on this so 2 or 4 speaker panels.

Separate Receiver

• https://www.youtube.com/watch?v=9Apn7_QybNo
• Needs separate amps

Integrated

Has 2 50W channels. Probably plenty and simplifies the project.