Matt, Rodda these any good?
http://electro-voice.com/product.php?id=131
The EVID C10.1 packs a large, 10“ subwoofer in a tuned, high-performance enclosure to give amazing low-frequency performance down to 45 Hz. The C10.1 is one of the only quick-mount, ceiling, TRUE subwoofers available on the market.
•Designed for Commercial Sound/Life Safety, House of Worship, and other applications.
•10” subwoofer in tuned high performance enclosure
•Low-frequency performance down to 45 Hz
•Flexible installation
•Four-point mounting system
•Mounting support ring and tile installations included
•No additional accessories needed for most installations
btw i'm purely seekign Matt and Rodda's opinion on these .. if you wish to comment or aska question yourself .. go for it...