Sennheiser - IE 900 In-Ear Headphones

Innovative X3R technology, unique to the IE 900, combines the German-made 7mm transducer with a specially developed membrane, triple absorbent chamber and acoustic vortex for an anintense listening experience Larger sound than the lifespan of the 7mm TrueResponse transducer, made in Germany specifically for in-ear listening using the full frequency spectrum for critical hearing of all source elements Unique triple chamber absorption system and acoustic vortex eliminates masking problems for a refined and extended treble. Newly developed membrane film minimizes slippage and distortion International products have separate terms, are sold from abroad and may differ from local products, including fit, age and language of product, labelling or instructions.
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Sennheiser