The Marshall TSL602 is a 60-watt 2 x 12 Guitar Amplifier with three channels, one clean and two overdrive. The amplifier is powered by two EL34 power valves and driven by four ECC83 preamp valves. The speakers on-board are two specially-designed “Wolverine” speakers made and voiced specially for this combo by Celestion. The clean channel has a dedicated EQ and the Overdrive channels share an EQ. All of the standard Marshall appointments are on-board: Effects loop with mix control, Deep Switch and Tone Shift, and an emulated line out.