Yamaha RH5MA headphones are the undisputed professional choice in many studios across the globe. Like Yamaha's universally accepted NS10M monitor cabinets, think of the RH5M as as a standard reference monitor. They are that good. Their audio performance includes 98dB sensitivity, ultra-low 32 ohm impedance (so you'll never have a problem hearing them) and 20Hz - 20kHz frequency response. The ultimate in comfort, Yamaha RH5MA headphones have a semi-open design with urethane leather earpads and they weigh less then 6 oz. Their 8 foot oxygen free copper cord has a 1/4" end and includes a 1/8" adapter. Like the Yamaha NS10m speakers, this is the choice for studio monitoring. The ultimate in comfort with urethane leather earpads. These headphones are the semi-open dynamic stereo type with a standard eight foot oxygen free copper cord. Other Features 98 dB/mW sensitivity 32-Ohm impedance 20-20,000 Hz full spectrum frequency range Yamaha Quality Consumers and professionals around the world have come to associate the Yamaha name with the best in audio quality. That quality can be found in this premier series of headphones. Whether your use is casual listening or recording studio monitoring, Yamaha headphones deliver the best sound and comfort.