Astoria Dual is a full tube (4 12Ax7, 2 KT66) 30W (or 5W thanks to the built in attenuator) guitar head with two footswitchable channels that can take you from vintage pure-valve cleans, to dirty-sweet overdrive, to higher gain harmonic distortion. 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.