Revv D20 Amp Head BK, Tube Amp Head for Electric Guitar, Small and lightweight, Switchable from 4 to 20 W, Built-in Two Notes Reactive Load & Virtual Cabinets (6 customisable virtual cabinets selectable via the front knob or up to 128 via MIDI, directly connectable without speaker to mixer, interface or headset), In the Reactive Load Direct Mode, the Pre & Post switch selects whether the power amplifier is in the signal chain, Reactive Load is automatically activated when no speaker is detected to protect the amplifier, 1 Channel, Power: 20 W, Preamp tubes: 2 x 12AX7, Power amp tubes: 2 x 6v6, Controls: Gain (push/pull for more crunch), treble, middle, bass, volume, virtual cabinet, Switches: Standby, On/Off, power 4/20 W, pre/post, impedance 8/4 Ohm, ground lift, internal load/speaker, Effect loops: Serial buffered, Speaker outputs: 8/4 Ohms, Dimensions (W x D x H): 310 x 160 x 190 mm, Weight: 4.1 kg, Colour: Black, Gigbag included, Made in Canada@+*Connectors:*@+@+, Guitar input: 6.3 mm jack, Headphone output: 6.3 mm jack, MIDI input, USB, Balanced output: XLR, FX loop send & return: 2x 6.3 mm jack, Speaker output: 6.3 mm jack