I have 3 10" Rockford Fosgate's in a sealed box. It fit in my 3rd gen very nicely. The box is 1'x3'x11" (HxWxD). It sounded great but I just dont use it. The box is made of 3/4" MDF by a local audio shop by me. Speakers are P310D4's are are hardly used. It is decently heavy so shipping is probably not the best idea. Any questions just PM me. Asking $270 picked up in Queens NY.