Superlux Professional Monitor Impedance Model Closed-Back Headphones, 150 ohm HD660PRO-150

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Based on the HD660, this is a newly released professional closed-back dynamic headphone that aims to faithfully reproduce the sound of a live performance, capturing the sense of position and atmosphere of all instruments and vocals. Type: Dynamic driver, closed-back design, with earcups finished in a soft, velour-type fabric. Driver unit: 40mm dynamic type / neodymium magnet Frequency response: 10Hz to 30,000Hz, Sensitivity: 92dB, Impedance: 150Ω (compatible with high-output professional headphone amplifiers) Side pressure: 3.5N, Cable: Length: approx. 2.5m, 3.5mmΦ stereo mini plug. (Screw-in plug, 6.3mmΦ adapter included)