When I received my helmet (very quickly, thank you Amazon!) I first conducted a break! I left it plugged into my amp medium volume down on my platinum CD I put an uncompressed CD! and I waited a good twenty hours after !, and only after I conducted listening! First I slightly increased the low because I started with a title on bass, a Fender electric bass, a bass that sounds round and fat !, and there PERFECT! the bass is perfectly articulated and helmet not buzzing, great !. Then I listened to (still on uncompressed CD!) Various piano recordings, cello, percussion, organ, heart of men and women and more! I could not stop so the sound and natural and non-tiring helmet ears. Then I listened to various mp3 various qualities, the helmet performs well and always very naturally sound airy and dynamic two faults: the headset is not at all closed-!, and asks the power, too weak players will be inadequate! At this price it's all good!
