trash the entire system. dont try to salvage any of it. run new quality speaker wires. You can do an effective system to replace it by using a good pioneer deck to power the interior speakers, and prolly an 8" powered bazooka in the back. simple, lightweight, cost effective.

for the interior speakers get some decent coaxials from Ciruit City or best buy. Make sure that when u listen to them u have enough treble coming from them...because with a pioneer you can always tweak it back. Use the pioneer decks crossover to: coaxes > 100 and the bazooka < 100.

that should rock the mic. just my $3.50