Mattias Bernt Johannes Eklundh, also known as IA, is a Swedish guitarist and vocalist. He is known for his work with Freak Kitchen, Jonas Hellborg and Art Metal, and he has also produced several noted solo Freak Guitar albums released by Steve Vai and Favored Nations, and holds his annual Freak Guitar Camp in the woods of Sweden every summer for dedicated guitar players from all over the world. He was also prominently featured playing his trademark-style solos on the first four Soilwork albums.

Jonas Hellborg is a Swedish bass guitarist. He has collaborated with John McLaughlin, Ustad Sultan Khan, Fazal Qureshi, Bill Laswell, Shawn Lane, Jens Johansson, Anders Johansson, Ginger Baker, Michael Shrieve, V. Selvaganesh, Jeff Sipe, Mattias IA Eklundh, Public Image Ltd, and Buckethead.