In addition to timeless design and classic style, the Sennheiser HD 238 On Ear Stereo Headphones headphones offer a high-quality, life-like, stereo sound experience courtesy of Sennheiser's advanced Open-Aire acoustic system. You will not believe that such a wide, expansive sound-stage can come out of such a compact headphone. The Sennheiser HD 238 On Ear Stereo Headphones Open-Aire speaker design is used to achieve the highest sound quality, fidelity and representation of frequency response in close proximity to the earAfter hearing the Sennheiser HD 238 On Ear Stereo Headphones, you too will be a believer in true sound.