Designed and built according to specs. for this low profile subwoofer to put out the maximum BASS. Just this one subwoofer with the right AMP. is all you need to be heard for blocks. The box is 17"H (on all sides all the way around) x 16"W on (top/bottom) (and all sides all the way around) . If you want to hear it you will need to bring the AMP and wiring because I no longer have them to hook up to the subwoofer for you to hear its performance. It does have a couple of cuss words on top of the box FYI. CASH ONLY FIRM $!!!! No paypal, No shipping anywhere , NO checks or money orders, and NO credit cards of any kind. You can come pick it up or I can meet you somewhere reasonable if you are committed to buy item only! Thanks for stopping by! Have a great day!