ok so i have 2 rf r1 in my truck right now, both subs behind passenger seat, i want to do like one memphis c3 or jl w3, i want the box to be big just behind the passenger seat, get a little smaller behinf the middle seat and still have room for my 500watt memphis mono block to lay sideways behind mine, maybe ported idk.....any ideas or suggestions pleease thanks