Grell OAE2 Open Around-Ear Audiophile Headphones Accessory the Sierra was tuned for

the Sierra was tuned for a true-to-life soundstage with the physical bass presence and slam that the Linear Extension system enables

pressure-free seal that refreshes tired stock pads for a fraction of the cost

5 Ω at 1 kHz Frequency response 5 Hz - 20 kHz SPL at 94 dB / 1 kHz 12

Grell OAE2 Open Around-Ear Audiophile Headphones Accessory the Sierra was tuned forGrell Audio OAE2 Dynamic Open Back Headphones The Next Evolution of the Soundstage. Designed by legendary acoustic engineer Axel Grell (the mastermind behind the iconic HD 600 and HD 800 series), the Grell OAE2 represents a fundamental shift in headphone listening. By reimagining driver placement, the OAE2 eliminates the claustrophobic "in head" effect of traditional headphones, replacing it with the natural, front oriented spatial imaging of a high