How much is one of those? £2500!
I can buy a 600w CHT-R15 Velodyne for £795 with all the performance it produces for that price.
I really should have originally stated 'value for money'.
REL came off my 'best' list a while ago having already owned a CHT-15 in the past and know just what it can do.
REL make nice bits of kit, but imho it's over priced for what's on offer.
My opinion of course and naturally can be wrong, but it's not easy finding a powerful, good quality UK sub that offers true value for money.
B&W come to mind, but I'm hard pushed to think of any more.