hope you put a divider between the two seperate speaker compartments...also I hope you looked up the air space specs for what the sub is supposed to have and whether or not it is supposed to be ported or not. There is a lot that goes into building a box...you cant just slap some MDF board together and expect it to sound amazing.....not to rag on the box...just mite want to do it right before you spend money on vinyl and such.