June saw Sennheiser release a limited edition of its iconic HD 25, today the company has announced a special collector's edition of its HD800 S headphones – strictly limited to 750 units worldwide - a generous ten for each of its 75 years the company is marking.

The Anniversary Edition HD800 S (£1,399) sports a laser-engraved serial number and an exclusive matte gold colour yoke, decor ring and shell ring. Naturally, these select cans are handcrafted at Sennheiser's headquarters in Wedemark, Germany. The personal audio maestros use glass-fibre strengthened plastic so that the housing is both light and durable. The earpads cosset your lugs with a soft vegan velour material, while the grid and grilles have been crafted from a stainless-steel mesh.

What makes the HD800 S a head-fi fan's favourite is its vast frequency range of 4Hz to 51kHz thanks, no doubt, to the 56mm transducer being made of Sennheiser's patented duofol-transducer material. Additionally, this enables the company to be able to quote total harmonic distortion at less than 0.02%.

Furthermore, Sennheiser's innovative absorber technology avoids unwanted peaks in frequency response. It is said to mitigate the “masking effect” - where you're unable to perceive higher-pitched sounds that have low-volumes when significantly louder sounds in a lower frequency range occur.

Finally, the circum-aural earcups are also the result of meticulous attention to detail. The design, we are told, directs the sound waves to the ears at a slight angle to create a natural and spatial sound experience.

The Sennheiser HD800 S Anniversary Edition will be available from 22nd September for $2,599.95 RRP.

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