Bjr all musicos I am a singer guitarist and a little keyboard uses sound for 15 years and I must say that even when the gas to room somoriser of even very large we still too much power then was thinking more of 4 das DS8 150 w ev and two 300-w and it really enough for me while I have far too RCF 500 A powerful must see especially the rooms not the stuff of pregnant aujour of hui and very good but the room and he horible the problem then the HP 38 and yes hello mess with your big subwoofer that gives the brothel not listen to music and especially your sound on the outside and then you'll understand in a room friendly JACK