MTX is one of my favorite brands to purchase because they offer top tier products at reasonable prices but thanks to onlinecarstereo.com, I never shop anywhere else unless it's an immediate need to do so! These 12's come with a hidden trick because they're 4 ohm. Before,it sounded good in the interior of my car and rattled the trunk and license plate. After I rewired them in 4 ohm configuration and bridged it to an extremely old 340 watt Jensen amp, people swear I've got 15" subs in a lil Toyota!!! These subs are a beast! #TrunkBangin4Life