The idea of a portable amplified speaker for playing music is cool, especially with the retro feel of this project.
I think it would be even better if it had an optional Bluetooth feature. That way you could play music that sounds good and is loud from your Phone, laptop or Bluetooth MP3 player, without the hassle of the wire.

One way to do this would be to add as an option a Bluetooth receiver like this HDE® Wireless Bluetooth Receiver from Amazon

Ideally breakout the power so one power-cord could charge both the battery in the unit and the Bluetooth adapter.

Thanks for considering