If you can fit two 15's, that's a lot more cone area. You definitely want to build a custom box for them to get the best output.what would be better 1 15 and a better amp or 2 15s and a better amp later on
Custom box, their are a bunch of builders on this forum that can help you out. Their is an enclosure section as well. You absolutely don't want to buy any premade enclosures, their is a lot more to a subwoofer than putting it into a box. You have to look into each individual specification, which vehicle it's going into and design from their.do you have any suggestions on a box for it?
should land you in the 130 db range with a single E 15 in a custom box. Mid 120s with a sealed.
I'd even say a single hds312 on 1k would be nice.Seriously consider the Soundqubed subs. They are more on the budget side of things but have excellent quality for the price. I try not to say go with one brand over the other but in this scenario, they are by far more bang for buck than the lower model Sundown's.
They will completely blow the Lanzar out of the water.