no it is useable im sure but like you said i will need new connectors. and i had to sell my subs because i had two 12 ina massive box in a extra cab truck, there was no room, im replacing it with a stealth box under my backseat with 2 10"s i sold the wire set for the amp that was powering my subs but is till have another set of wires to put my 4-channel back in. but the questions is, where should i mount the 4-channel? there is just no room. either way weather i was gonna keep the 4-channel or not it still ahd to come out for the meantime until i can find a new place to put it and buy some more wire sence the amp will be relocated im going to have to extend the wires from my speakers.