Wikipedia
Helpinstill
Helpinstill is an US-based company which produces a unique electromagnetic pickup system for amplifying grand and upright pianos on stage. During the late 1970s the company also marketed a range of portable pianos ready-fitted with the pickups; these instruments were built by Kimball to Helpinstill's specifications. The company's founder and namesake, Charles Helpinstill, performs in Houston with his band, Ezra Charles and The Texas Blues Band.