Electric grand piano

The electric grand piano is a stringed musical instrument played using a keyboard, in which the vibration of strings struck by hammers is converted by pickups into electrical signals, analogous to the electric guitar's electrification of the traditional guitar.

Since electric amplification eliminates the need for a resonant chamber, electric grand pianos are smaller and lighter (around 300 pounds (140 kg)), and consequently more portable, than acoustic pianos. Electric amplification also bypasses the difficulty of having to mic a conventional grand piano, and thus makes an electric grand easier to set up with a sound system.

Experimental efforts to electrify the grand piano began in the late 1920s with the . In 1939, the first commercially available model, the RCA Storytone, was introduced. These instruments featured the traditional hammered-string mechanism with pickups instead of a soundboard. In subsequent decades, other instruments now referred to as electric pianos were developed and saw wider use; these differ from electric grand pianos in that they produce sound by hammers striking metal tuning forks or reeds rather than strings. In the 1970s, hammered-string electric pianos returned to commercial production, beginning with Yamaha's CP-70 and CP-80, followed by models by Kawai and Helpinstill.

In the 1980s, with the advent of the digital piano, the electric grand piano declined in popularity, and production ultimately ceased. The electric grand sound survives as part of the official General MIDI specification, with most instrument manufacturers licensing the CP-70 and/or -80 sound from Yamaha.

The band Keane uses Yamaha's CP-70 exclusively in its music. The band Tokyo Keys also uses the CP-70 (with guitar effects pedals and amplifiers) as an integral component of its sound. Michael Curtes of Polite Sleeper plays a CP-70B as his primary keyboard in live performances.

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