A custom-fit sub nestles into an out-of-the way location in your vehicle, with a finish that makes it look factory-installed. These powered models also solve the problem of where to put the amplifier, as it's built right into the enclosure. For some folks, a custom-fit, powered sub can be the best of both worlds: Bass plus space!

Custom look, custom sound, thunderous bass.

MTX ThunderForms
These airtight enclosures are custom-designed to fit and blend inconspicuously with specific vehicles. They include one or two subs, depending on the vehicle, and a 100-watt amplifier. Speaker-level inputs let you connect them to any factory stereo system. ThunderForms are also available in non-powered versions.

Pickup trucks are especially challenging vehicles for adding a sub — or so you'd think! This MTX ThunderForm is custom-crafted to fit behind a Ford Ranger's front seat.