This MTX RT8PT is an 8-inch single amplified tube that is rated 240-watt MAX. The RT8PT can fit into any space and features a butyl rubber surround, built-in amplifier, vented enclosure design, comes with mounting straps and wired bass control. This subwoofer will hit bass notes from 35Hz 250Hz. The vented design increases bass output on the enclosure. Thunder Bass, Hard-hitting, hard-working MTX subwoofer Convenient Size, Small size, but giant bass! Easy installation, Mounts quickly in most trunks and SUVs | Mtx | | AUDIO RT8PT 8" 240W Car Loaded Subwoofer Enclosure Amplified Tube Box Vented | Black | Best Buy