SLM Concert Spectrum Stereo Analog String Brass Piano Harpsichord Synthesizer
Published on Apr 26, 2015 keyboard resource
via this auction
"Condition: Works good. Bottom-left corner is cracked. Includes metal legs and crossbar. The legs may be missing parts to keep it from tilting. I'm not sure as I've never seen a picture of the complete package. See pictures.
The SLM (St. Louis Music) Concert Spectrum is an extremely rare, stereo analog string/brass/piano synthesizer from the mid-1970's.
Famously used by Richard Tandy of The Electric Light Orchestra. It is mention in this excerpt from a December 1978 Keyboard magazine article: 'Richard's collection of onstage instruments consists of a Hohner Clavinet, a Polymoog, a Yamaha CS-80 synthesizer, a Mellotron (called "Old Faithful" by Tandy), a seven-foot Yamaha grand piano, and the Wutlitzer. In addition to these, the band carries several back-up keyboards - an extra Mellotron, two spare Wurtlizer electric pianos, a Minimoog, and an SLM Concert Spectrum string synthesizer - in case any of the front-line instruments malfunction.'"