The base acts as a resonator. The two large sides are 0.25 inch redwood ply; the seven soundboards (five of them not visible) are vertical-grain redwood. The 72 strings are guitar, tenor guitar, and banjo. Guitar tuning heads.
Begun in Los Angeles, and finished in Ithaca, New York. Rebuilt at the University of Illinois.
Close to 6 feet high, to the top of the music rack; 3.5 feet across at the broad center; tapering in width from 9 inches at the bottom of the instrument proper to 4 inches at the tops of the two arms. They are arranged in twelve hexads, each containing four to six identities of a tonality. Pyrex rods (5/8 inch) stop the two outside hexads for higher chords and gliding tones or chords. The instrument belongs to the lyre type, hollow arms and base; it is an elaboration of the ancient Greek Kithara.