If you pull one of the subs, they should have the model number on the back of the magnet. If you have 4500s or 5500s, you are in the right area. If you have 7500s or higher, you probably dont have quite as much power as the subs would like. Not enough power is potentially a problem, because you turn up the volume, and send the subs a clipped (or distorted) signal...which tends to blow subs. Be careful, and you should be just fine.