I havee a aiwa headunit forget exact model but its around 350$...I also have 2 aiwa speakers and 2 pioneer speakers problem is i had everything hooked up fine... I took my car to rx7store to get a few things installed,boostcontroller/fuel controller...When i ggot home i realized the cdplayer turns on etc like normal but NOTHING comes out of my speakers all i here is a tiny pop noise when i turn on my cd player...My question is does anyone have a clue what it is...I checked the audio fuse its fine+if it was bad the cdplayer woudlnt work...I then looked behind headunit to see if anything got unplugged and everything is fine... Any help Would be very much apprciated...

 

+1, have the same prob, ground is intact so is the fuse, wiring does seem alittle sketchy cuz i had best buy do it cuz i was in a hurry.
thought it was 20 year old wires to new tech cd/radio.