Koss's expensive headphones promise superior noise reduction

Another pricey set of earbuds has just been releases, this time by consumer electronics manufacturer Koss.

The QZ77 Dual Noise Reduction Stereo Earbud features Active Noise Reduction and Passive Noise Reduction to eliminate unwanted aural distractions.

Modelled on Koss’s The Plug, the QZ77 features a dynamic element position outside the ear, while soft foam cushions expand in the ear for a custom fit and to improve isolation.

The £75 earbuds have a frequency response of 15-25,000Hz, and impedance of 60 ohms, and a 4ft cord.