Why do many headphones have output frequency of 5Hz to 22000Hz even though humans can hear 20 to 20000Hz only? - Quora
Amazon.com: Pioneer DJ HDJ-X5-S - Closed-back Circumaural DJ Headphones with 40mm Drivers, with 5Hz-30kHz Frequency Range, Detachable Cable, and Carry Pouch - Silver : Musical Instruments
Beyerdynamic DT 150 250Ohms Dynamic Closed Studio Headphone with 10' K 100.07 Cable, 5Hz-30kHz Frequency Response, 3-Pole 1/4 Stereo Jack | Reverb
Pioneer DJ HDJ-X5BT-N - Closed-back, Bluetooth-compatible, Circumaural — Rock and Soul DJ Equipment and Records