if your running 6 x 9 s of decent quality you prob dont really need a sub in ma civic i had 2 sets of 500w 6 x 9's running from a 800 w amp and 2 12" subs runing from a 1000W mono amp to tell the truth i didnt notic that the fuse for the sub had blown it was still enough to make the drivers seat move around the subs could only be heard if i turnd up the sub control to full which was a bot much
your cd player should really have a set of pre out connectors to like up the amp prefer to have at least 2. 1 dedicated to the sub and 1 for speakers.
you can get line out connectors if your cd player does not have pre outs these are connected to your speaker wires and have a phono socket to connect to a amp |