I opened up few subwoofers to look inside. A B&W PV1, a Velodyne SPL10, and a couple of no-names. Hope you find it interesting. :) | Speakers, Soundbars and Subwoofers
B&W PV1 Powered Subwoofer - The Music Room
B&W Bowers & Wilkins PV1 home cinema Subwoofer goes nuts! Test and reviews! - YouTube
iF Design - PV1 Active Subwoofer
B&W PV1 Subwoofer - electronics - by owner - sale - craigslist
B&W PV1 Dual 7" Powered Subwoofer; Silver Gloss; PV-1 - The Music Room
One Bowers & Wilkins B&W PV1 Home Cinema Subwoofer Speaker Driver | eBay
Bowers & Wilkins Dual 8" 400W Active Subwoofer Black PV1DB - Best Buy