If you blow the subwoofer, there is a replacement cone kit that allows you to easily swap out the blown/burned voice coil and surround with a new one. The replacement kit allows you to keep the magnet and basket, therefore saving money as you do not need to buy a new sub.
Kenwood head unit and door speakers; Orion power and Sub. HCCA 102 installed in a sealed box that replaced my armrest in rear of Lincoln Aviator. About 1cu ft. Sound is clear and hard but I had to upgrade to Orion 2400 amp. Must use pro amp; 1000watt Performance Technique amp wouldn't even push sub. With amp at 1ohm stable on two subs you wont be dissatisfied. Beware long excursion subwoofer, the subs should be bolted to box. I sealed front of box and left rear open so subs could be bolted as solid as possible.
Sold on Orion power and subs!!!