I need some help with what subwoofers I should get. and if I could get them at a store instead of ordering them off the internet. and I also need some subwoofer box blueprints
That's too broad of a statement. Minimum pararmeters would be budget, preference of SQ, SQL or SPL, amp available, car housing said subwoofers, charging system used, "stores" in your area available, the cost of rice in China ect, ect, ect.....