RH-D20 headphones are built with the performer in mind, from DJs to drummers and any other musician who requires durable headphones with high-impact, full-range sound. The RH-D20 with 40 mm drivers contains CCAW voice coils for outstanding power and performance. Thanks to their 180-degree rotating-ear-piece design, it allows either earpiece to be flipped during performance when a blend of headphone mix and live-room ambience is desired.