i have sourced a set of p1 12 inch crossover subs and a dv600 amp . i have had a chance to hear 1 12 in action and all i can say is thats what im after. the subs need under 1 cubic foot per sub so will be able to retain 3/4 of my boot due to the box design. will post some pick and hopefully a db level when its all in. thanks for the info guys