If the yellow RCA's are simply connecting the amps' date=' then yes, you'll need to replace the Red RCA's. RCA's are what send the amp's information on what to "play" and send on to the speaker. Without them, the amp will not tell the speaker to do anything and remain idle. Make sense, sorta kinda?
On the + side, RCA's are less than 20-30$ and easy to do yourself if you can access wherever they start. Usually the back of the Head Unit. If a shop must do it, it'll be hard to charge too much for something of this simplicity.
And yeah, bass is fun lol.[/quote']
So to disconnect the battery it seems like all I need to do is take the negative terminal off the battery? As for running the RCA that should be something I can do right? I don't see why I couldn't if I learn how somewhere. What about cutting the plugs off and replacing them with new ones?