Finally ordered a new sub since my kenwood shallow 10" failed. I am getting a rockford fosgate r2sd2-10. Probably not the best but it was cheap. I have a question, at what point does one need a cap.? I only have a 760 watt Xplod to drive the sub. I am only going to wire it to 1 channel because bridged I blew up the Kenwood. Also what are good 5x7/6x8 door speakers?