A revamp of Sennheiser’s premium headphone series, the HD 598, HD 558 and HD 518 feature proprietary E.A.R. (Eargonomic Acoustic Refinement) technology, which involves slightly angled baffles that guide the audio signal directly to the ears.
Powerful neodymium magnets and Duofol diaphragms are credited with providing natural, lifelike musical reproduction, while low-vibration plastic materials are claimed to prevent distortions to the sound image.
The HD 558 and HD 598 also feature a sound reflector for improved spatial effect, plus a gold-plated 6.3 mm audio jack plug with detachable cable.
The topline HD 598 offer frequency response of 12 to 38,500 Hz, luxe cream-coloured surfaces, a dark woodgrain finish and glossy metallic trim for $440. The HD 558 cost $320 and a claim frequency response of 15 to 28,000 Hertz, while the HD 518 cost $230 and provide 14 to 26,000 Hz response.