A comparison of the best subwoofers of 2020 - Son-Vidéo.com: blog
B&W PV1D Subwoofer test bass HQ Bowers and Wilkins speaker - YouTube
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 - StereoNET International
Bowers & Wilkins PV1 review: B&W PV1 - CNET
Bowers and Wilkins B&W Subwoofer PV1D test (HQ) + CM9 speakers - YouTube