One 10inch polypropylene cone with a butyl rubber surround on a reinforced ABS baffle. High output and maximum efficiency with an accentuated 70Hz peak to maximize listener's low-frequency experience. Extra-large SoundTube-specific 12.9liter steel deep can for quality bass response. Rapid-installation, blind-mount, fixed-wing mounting mechanism with constant-tension design affixing to ceiling thicknesses ranging from 0.25inch (6.4mm) to 1.91inch (48.5mm). Easy-access five-position tap switch for 25-, 70.7-, 100volt and transformer bypass position. Steel grille with protective powder-coated finish for lasting durability plus a tool-free strap for easy installation. Baffle-mounted, flared and tuned port for maximum efficiency and frequency response.