Description Product Description The Marshall Astoria Dual, with footswitchable channel change, can take you from vintage pure-valve cleans, to dirty-sweet overdrive, to higher gain harmonic distortion. Combine this with footswitchable FX Loop and extended tonal shaping for greater performance flexibility. The Body feature adds 'girth' to your sound for chunkier riffing. It works by adding a +8dB shelved low frequency boost from 120Hz downwards. Edge makes the overall characteristic sound of the amplifier brighter or darker. To achieve this, it cuts high frequencies between the phase splitter and the power valves. Edge is a power stage function with a similar effect to a traditional 'presence' control. Note that he higher the Master volume level, the more pronounced the Edge function will become. The Power Reduction pull switch drops the amplifier's output power from 30-watts to 5-watts, which produces softer tones and a less 'in your face' sound. The Astoria Dual features a footswitchable, valve driven footswitchable FX Loop, which has a Loop Level control to balance the external FX level with the amplifier level. The FX Loop is true bypass, ensuring that tonal integrity is maintained when it is switched out of the circuit.