Samson CH70 Headphones are a great choice for those who prefer a lightweight studio headphone. The CH70 features a closed back design, 20Hz to 20kHz frequency response, and 40mm Mylar drivers. 32 ohms impedance, 103 dB SPL at 1kHz +/- 3dB. 3-year warranty. CH70 headphones are ideal for any listening and monitor application where critical sound reproduction is needed. The closed-ear design provides maximum isolation reducing unwanted bleed that can be picked up on live microphones. The CH70 employs exceptional 40mm drivers with ultra thin Mylar diaphragms and high-output neodymium magnets. The result is a wide dynamic range and linear frequency response from 20Hz to 22kHz for exceptional reproduction and a balanced sound making them a perfect choice for monitoring digital audio. The adjustable headband and lightweight design provide comfort and easy listening through the longest sessions.