Audioquest - Sky

Sky
In order to raise the performance of  Sky over Niagara AudioQuest expands the diameter of the FEP Air-Tubes by 50%. The Noise-Dissipation System is also improved by increasing the system from three layers to five layers, further reducing the modulation of noise on the ground plane. The overall effect is less interference from the insulation and an improvement in dynamic contrast.

Read more: http://www.audioquest.com/reference-series/sky