The Eighties success story Guitarissimo - Peter Horton and Sigi Schwab - has upgraded itself to XL, unveiling two new jewels in the crown of sound that is Guitarissimo: Tommi Muller, bass and Andreas Keller, drums & percussion. Peter Horton and Sigi Schwab were associated for many years, and soon joined forces to create the Duo Guitarissimo. The two became musical legends and an inspiration worldwide to guitarists and lovers of the guitar.