Famous for its woody, organic and beautiful sounds of saturation, these legendary British amplifiers, the Super Lead & Super Bass, have been delivering one of the all-time classic sounds for almost 50 years. Players like Jimmy Page, Paul Kossoff and countless other relied on this type of tone for their signature sound. Xotic has recreated this vintage masterpiece in a rugged small enclosure. The SL Drive offers very amp like response and cleans up nicely with a roll of the volume knob. The internal dip switches allow you to choose the sound characteristics of both 1959 models.