The new Sonic 4 is a go to for those familiar with foil kites but not seeking the attention level demands of flying a full on race kite.  Higher perfomance without higher stress achieved through ease of use and amazing wind range.  The Sonic 4 is great kite for any foil kite fan. Especially for those who familiar with the Soul 2, but seeking something more exciting.

From Flysurfer-"The SONIC is the trustworthy, user-friendly, and predictable high performance powerhouse you can ride in the most challenging weather. Specialized to meet the needs of the next generation of foil kiters and an incredible upgrade for those of you who have flown the Soul but want to take the next step in kiting evolution. 

The Closed-Cell Sonic 4 is redesigned to perform exceptionally in every aspect of kiteboarding. Big air ,speed junkies, technical airstylers and long distance kiters."