This is an expanded tuning kit for all AEON headphones. The kit includes Black Foam, Black Felt, 1 and 2-Notch White Felt filters to tailor the sound of your AEONs to your taste.
About Dan Clark Audio
Formerly known as MrSpeakers, Dan Clark's headphones are hand-assembled in the USA, and their intensive sound research has resulted in a number of patents for technologies like their V-planar driver and TrueFlow magnet array. The headphones are all tuned by Clark, who favors a signature quite close to the Harman Response Curve, that tends to results in a smooth, powerful sound.