Pioneer se mj722t bass head headphones pioneer39s striking se mj722t bass head on ear headphones are designed to provide optimum performance with club beats the newly designed large 40mm drivers deliver a balanced and powerful listening experience with great bass reproduction letting you listen to your favourite music the way it was meant to be heard a wide playback frequency of 6hz to 40 000 hz with an output level of 101db ensures dynamic beat reproduction and the gold plated 35mm ster