Core of the HD 800
The HD 800 is a testament of the Sennheiser quality, perfect in every detail. Everything that is crucial to the inner working of this ultimate headphone – transducer, aluminum coil, magnet, etc - is bigger than those in competing products.

As a rule, sound quality becomes purer as the size of the transducer surface that is vibrates on increases. In the high frequency range, a large-surface transducer unavoidably produces additional unwanted vibrations and distortions due to inertial phenomena.

Sennheiser overcame this problem with the HD 800 by using a circular transducer. In this way, only a ring of a large diameter vibrates instead of the full surface: noticeably less material – with a corresponding lower inertia and tendency toward additional vibrations in the high frequency range.

What makes this product revolutionary is that the cohesion of air molecules and the surface effect produced by a larger circumference causes the entire volume of air above the transducer to vibrate. The result is a more voluminous sound wave, a distinctly clearer sound, and audibly better playback of the original.]]> Natural hearing experience
Our ears perceive audible signals as natural when we give the sounds a spatial dimension. Creating the impression that a sound source is located in a room – and not coming directly from the head of the listener – is ultimately achieved by producing very short time delays, with which one and the same sound wave hits our internal hearing organs.

To understand the concept of spatial hearing, imagine sound waves coming from two speakers positioned at 60° will meet the listener positioned in the middle. In the region directly in front of the ears, the sound wave front can be envisioned as one line that hits the ears at about 45°. The sound does not travel directly to the ears; rather, it travels at a slight angle. Because of this, some sound waves reach the nerve endings in the inner ear region earlier than others. The resulting delay takes place within the smallest fractions of a second – and this gives the impression of spatial hearing.

Sennheiser has devoted the last 60 years to replicate the basic acoustic conditions of natural hearing and its efforts have culminated with the HD 800. Presently, no other manufacturer has been able to come as close as Sennheiser in reproducing the natural hearing experience.]]>