Hi Guys,

I recently bought this headunit and i'm slightly confused.

This may sound noobish or it may sound werid to you but the CD player itself has a "Sub out" which of course has to RCA plugs coming out. Except on the end of these RCA plugs there is (Looks like) a little black bulb or something just looks like RCA's with a bulb on the end.. can this bulb be taken off or something? I'm confused because I've never seen it before

Its a plastic protection "nipple" to ensure the metal of the plug doesn't short on the chassis or any live wires.

Just pull it off to use the sub out. :D