i have the money now for a amp/sub. the installer said i could hook it up to the stock headunit. i have the base stereo no mach system. im gonna do this until i get anough money for a headunit which should be like around 2 weeks or so. how will it sound? im gona be running a 12in kicker L7 in a sealed box and kicker 600/1 amp. will this work?