ROCKFORD FOSGATE PMX-0ROCKFORD FOSGATE (PMX 0) MARINE DIGITAL MEDIA RECEIVER WITH BLUETOOTH (DOES NOT PLAY CDS) AN ULTRA COMPACT RECEIVER Minimalism can be a good thing. The ultra compact PMX 0 marine digital media receiver doesn't have a CD player or a built in amp, so it can fit into the tightest spaces. But when you connect it to a marine amplifier to power your system, you'll get maximum sound quality. ADD YOUR AMP AND ENJOY YOUR MUSIC Once you've hooked up an amp, the