Check the listing for details. On-Stage Quantum Core Column Keyboard Stand LN. Condition: Used. Listed at 328.20 USD. Quantum Core is On-Stage Stands' first column-style keyboard stand. It is a pro-level two tier stand with integrated cable management and fold-away captive support arms. Built around a rigid extruded aluminum core, the KS9102 is an extremely stable platform, capable of supporting 125lb. per tier; that's 250lb. total! Its four arms and three legs provide a broad foundation for instruments, yet fold neatly within the core for transportation. They are completely captive with no loose parts to lose. Whether deployed for performance or folded for transport, they stay attached.Each of the Quantum Core's two tiers is independently height adjustable. Overall tilt of the stand can be adjusted via a forth peg-leg to provide just the right playing angle.