Carbon is Illusion’s premier line utilizing the best technologies. They deliver audiophile sound quality combined with high loudness and extreme durability. Carbon sound quality is detailed, revealing, extremely dynamic and punchy. Bass is articulate and extended with good weight, revealing the rhythm and pace of the music. The low distortion, extreme clarity and enormous sound stage size bring the concert alive. You have never heard music this real in a vehicle before! Illusion Audio Carbon speakers are truly, “compact without compromise”. Carbon Series 4-Inch Coaxial Kit Free Air Resonance: 46.