Yamaha RH5MA - Supra-Aural Semi-Closed Stereo Professional Monitor Headphone. The RH5Ma is an over-the-ear semi-closed headphone that is suitable for studio monitoring, providing ultimate comfort with the urethane leather ear pads. The 40mm drivers produce impressively accurate sound, particularly in the difficult low to mid-low frequencies. A standard eight-foot oxygen-free copper cord comes with the RH5Ma, and a 1/8 mini-jack and 1/4 TRS adapter facilitates connectivity. Supra-aural semi-closed stereo headphone ideal for use both for professional applications, and with portable audio sources such as MP3 or CD players 40mm diameter drive units deliver deep bass with low distortion and wide dynamic range OFC cable provides both 1/8 mini-jack and 1/4TRS phono connectivity