Put one of these in a 06 Chevy 2500HD crew cab. Fit nicely under the rear seat, eliminating need for custom enclosure.enclosure is very nicely made, and subwoofer itself seems very good quality. Paired it with a Pioneer GM-3400T, these seem perfect for each other. Filled the lack of bass from the stock system and then some! Hits really hard for a shallow mount subwoofer. Better than any other shallow mount I have heard. Sonic has the lowest price I could fine and as always great service!!!!