I bought a small external speaker system for an iPhone at Radio shack for $14 USD and tore it apart to fit in a 1960s vintage Civil Defense radition level detector. I got them on eBay cheap! like $12 each! and they even worked!
So I gutted the unit and had to grind off a lot of aluminum reinforcing gussets on the inside. The CD box had a pen like radiation collector that was pressed onto a contact at the screw cap for resetting it after use. So I reused that cap for the iPhone output jack for the music input to the external speaker.
I added in a small power supply for 5 vdc for the leds and a power cord. Also made a speaker protection plate and that's it! A perfect dormitory iPhone speaker / charger!