Soundtube CM1001D-T-WH - 10-Inch In-Ceiling Subwoofer with Deep Can and Transformer (White)The 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