Sennheiser IE 900 In-Ear Headphones clearance 2) the headphone must be

2) the headphone must be comfortable for the user

Unlike the professional version Phonitor 2

Dekoni designed these pads to improve comfort and isolation

5 mm: 123 dB A weighted Dynamic Range 4

There’s more sensitivity over the entire frequency spectrum because the magnet´s air gap works more efficiently now

Sennheiser IE 900 In-Ear Headphones clearance 2) the headphone must beIE 900 The precision manufactured aluminum housing of the IE 900 faithfully protects the dynamic TrueResponse transducers at the heart of Sennheisers innovative X3R technology. Experience the peak of German audio engineering and manufacturing with earphones that deliver only the purest, most natural sound. Features New benchmark in portable audio Ultimate precision & craftsmanship Made in Germany X3R technology: TrueResponse transducer combined with