I've bought 2 pieces at about 130 cubic meter of space (about 10m long 4m wide 3m high to provide sound with nice bass. Listen so only music and that makes now a lot of fun. Price performance is very good. Have Pioneer VSX 821 K 5.1 AV Receiver. it tried to until S 51 W but I had in the middle of the room is no place for it, and at the ends of the room comb the bass not to the other end. This is why the 2 small but really give the bass a very precise and clean off. No buzz.