Design collaboration between Musser engineers and notable vibist John Piper, the Musser/Piper M58 vibraphone has a 3 octave range and silver finish wide graduated bars. Unique Piper Cushion damper pad equalizes pressure on bars for even dampening. Damper pressure is controlled by a dual action adjustable compression spring to assure proper balance and smooth, even action. Reliable fine tuning and volume adjustment is achieved by variable height resonators, despite the effects of varying environmental conditions. To accommodate individual players' technique, the adjustable damper pedal slides right to left. For the serious professional vibist, the Musser Piper vibraphone includes telescoping parts on the frame to facilitate quick and easy adjusments.