 Fender produced a solid state Princeton, the Princeton Chorus, from 1988-1991 ("red knob," made in USA) and 1991-1997 ("black knob," made in Mexico).This model was notable for its two independent 25.5-watt amplifiers running in stereo mode.In 2006, Fender revived the Princeton name, under "Princeton Recording-Amp" (Pro-tube series) and "Princeton 650" (under Dyna-touch III series).