Sony MDR-7506 professional closed-back stereo headphones are used in professional and home recording studios, radio/TV broadcast control rooms, and post-production studios. Sony MDR-7506 headphones have a frequency range of 10 Hz to 20 kHz, impedance of 63 ohms, sensitivity of 106 dB/mW, and are equipped with a 3 m oxygen-free copper cable with a gold-plated 3.5 mm plug. The headphones use large 40 mm drivers with a corrugated diaphragm for accurate, uncolored sound reproduction. The closed-back design provides comfort when working in noisy environments.