1967 Dual 15” Showman. Here we have a rare example in fairly good condition of one of the most popular backline amps in the mid- to late-1960s. With 100 watts of power pumping through two 15” JB Lansing 140F speakers, this amp could handle a range of instruments from guitar to bass at full volume. The main difference between this model and the “single Showman” amplifier, besides the “Dual Showman” designation on the faceplate, is a output transformer designed to handle efficiently the two JBL speakers. QC