So this is a fairly budget build, going in my 2001 Mazda Tribute. Only putting subs in the back, and new head unit, running stock speakers off the HU. I may upgrade my front stage eventually, but the stock comps will do until I have the funds for something else. So here's what's going in.
HU: Alpine CDA-9886
Subs: 2 12" Diamond Audio D3
Sub Amp: Sundown Audio SAE-1200d
Box: 40 ft^3 @ 32hz
Wiring: Kicker 1/0, Audison RCA's
2nd Battery: to be decided