I posted a thread a while back looking to upgrade my MJ Pro50. Considered B&W 750 and MJ Ref 1. Twas suggested i consider SVS. Did a lot of research and went for a PC20-39Plus. I ordered it on a Monday, and it turned up the following Tueday. What do i think ? OH MY GOD !!!!!! Ineed to break this down . 1. There service is staggering, both before and during the order process. e-mail replies on a weekend, crikey, you could be mistaken for thinking they care. 2. The build quality is awesome I have a dedicated purpose built cinema in the garden, which has attracted no interest in 2 years. The neighbours now know i have a new Sub. 3. Within 2 days the neighbour was round, wondering what the thunder like sound was....heee heee Seriously, this beast will blow your wig off (assuming you have one) The sub is in the back corner of the cinema, 10 feet away from me. Seating is 2 rows of cinema sets, When i first set it up (M&K K Series speakers set to 75db Sub to 85db) my seat was actually shaking. How i never wet my pants i do not know. So in summary, i'm quite impressed...not. i'm speechless!!!!