A 9. With that said, I stumbled across the PDP LVL 50 wireless just released. The volume control button is only accessories,you can turn and turn that button without any function and the sound other party hear is kind of muffled. Bought for my Son to use with his Xbox. Same thing happened. I guess the sound quality comes down to preference but personally i think they sound great I read all information and all reviews and ordered it. If they were a bit more brighter they?d be even greater, although I do like the SQ after burn-in. The strap doesnt slip off my heel, but since it has so much leeway in that section, I cant trust that it will be secure on rougher terrain than a flat floor. Be careful not to warp the frame if you do this.