These B475's are intended for PA subs. I guess some people use them in Home environments for the low freq response which thy do have. I have 3 of these and parallel run they do well as they are a bit power hungry. They do not have internal low filters like some subs do and you will need a crossover / speaker mgmnt tool to get the best sound from them. The Cabs are very well made with ergonomic handles and they are a but heavy - with 2 people they are easy.
Cheers,

Superb concert quality sub bass handling very low frequencies when used with mobile disco in large function rooms and venues.
Only problem is that they are heavy to move around.