40mm drivers provide exceptional frequency response closed-back circum-aural design delivers excellent isolation lightweight construction with comfortable earpads detachable replaceable 3-meter cable with 1/8" connectors copper-clad aluminum voice coil wire for optimum efficiency includes 1/4"-to-1/8" adapter collapsible design for easy travel. Whether you re tracking mixing or listening you can expect sonic accuracy from your Studiophile Q40 headphones designed by M-Audio leading provider of reference monitor technology. With professional-grade dynamic drivers and ear cups that completely surround the ears the Q40 headphones deliver full-range specs with excellent isolation from outside noise. Lightweight construction and comfortable earpads make them ideal for long studio sessions or hours of listening. These sturdy phones are collapsible for easy travel and even include a detachable/replaceable 3-meter cable to protect your investment. Whether you re making music or just enjoying it the Studiophile Q40 headphones let you get the most out of the experience.