So my cousin got his hands on a orion hcca 15 and a hcca d5000.1. The box its currently in is damage by water. The new box will be in his new daily (07 Ford Explorer). We are trying to build it within the next few days. I was going to use RE calc but ive heard its not accurate. Sub up port back? sub and port face rear? A local said 3.5 cf net tuned to 32hz would be perfect(sub up/port back). hitting lows are a must for this build. Please somebody help! we are fiending for bass.