Merging acclaimed features of the M-Series headphones with a foldable, travel-friendly design, the black Audio-Technica ATH-M30x monitor headphones offer solid build quality and audio performance for studio-based production, location recording, and daily listening. Outfitted with 40mm dynamic drivers and an over-ear, closed-back design, the ATH-M30x headphones deliver enhanced midrange definition and wide bandwidth (15 Hz to 22 kHz) while isolating you from outside sounds.