The Soundtube CM1001d-T is a 10-inch, blind-mount, in-ceiling subwoofer tuned for maximum output and performance across the operating bandwidth. By incorporating a 10-inch polypropylene woofer and a butyl rubber surround in a tuned and ported enclosure, this speaker delivers maximum low-frequency response (41 Hz 224 Hz, - 10 dB) and high SPL (111 dB). For added low-end punch, SoundTube has incorporated an oversized enclosure and tuned, flared port. Mounting hardware is included and features a constant-tension fixed-wing mounting system with a 21-gauge full-metal steel tile bridge, ensuring rapid and secure installation in any sheetrock or drop-tile application. Restraint cable included for easier installation.