[. . . ] [. . . ] HD 500 HD 500 Dynamic Headphone The HD 500 Symphony are audiophile-quality, open dynamic stereo headphones with an advanced diaphragm design that eliminates standing waves for warm, natural sound. They are suitable for use with hi-fi and recording systems of the highest quality, in particular CD and DVD players or DAT and MD recorders. Features--Benefits · High-definition hi-fi stereo headphones · BioNetic design for unparalleled comfort · Superbly spatial, transparent sound reproduction · Extremely lightweight voice coils for fast transient response · Innovative damping element for controlling the diaphragm oscillation, optimally matches the headphones to all sound sources · Detachable, robust, single-sided connection cable made from Kevlar-reinforce OFC copper · Velour earpads Technical Data Frequency response Transducer principle Frequency characteristic Nominal impedance Characteristic SPL at 1 kHz Load rating THD Ear coupling Contact pressure Weight (without cable) Connector Connection cable 18­22, 000 Hz dynamic, open diffuse field equalized 64 102 dB 200 mW < 0. 2 % circumaural approx. Fax: 514-426-3953 Manufacturing Plant: Am Labor 1, 30900 Wedemark, Germany [. . . ] [. . . ]