Hi i was in my buddys car he gots two 12s JL AUDIO W3V2 it was amazing parked in garage the damn garage door opener about 5 ft above car was shaking a lot about to fall. I dont really want that kidna bass but i woudl like it whats my best options will 1 adire tempest do it ? If so do i need a big box for it ? was reading that u need about 4 ft3 for it. Or stick with 1 shiva in a ported giving it 300RMS power? Also his box was a ported one about 5.4 Ft3 i really did like his bass was sitting in pasanger seat and my butt was shaking........anyways thanks right now i got apline 9831 perfect6.1 and mrv-t320...also if i did need tempest what amp woudl i need for it i dont wanna give it 750RMS i dont want a new alternator or battery...also its a 99 civic LX . 4dr