Features CRANK IT UPHigh and low power options mean you can change between 50W and 100W of power. TWICE THE FEATURESThis amp has two footswitchable channels, one clean and glistening another with grit and distortion. It has two reverb settings for each channel so you can dial in the reverb ready to perform. GAIN A LITTLEEach of the two channels has its own gain and volume settings so that you can crank the gain in the preamp and the volume and get the true loud Marshall crunch. A SERIES OF FXA series FX loop for is for those pedal lovers. Adapt your sound by adding in the FX you like best. Specifications Model: JCM900 4100 Range: Vintage reissue Technology: Valve Channels: 2 (Split) Output wattage: 100W Outputs: 2 x 1/4 jack speaker outputs, (1 x 16O / 2 x 8O / 2 x 4O load selectable) Inputs: 1 x 1/4 jack instrument input Controls: Channel B (volume, reverb), channel A (volume, reverb), presence, bass, middle, treble, channel B lead gain, Channel A gain Effects: Reverb Effects loop: Yes, with level control Preamp valves: 2 x ECC83, 1 x ECC83 (phase splitter) Power amp valves: 4 x 5881 Footswitch: PEDL-91004 included Cable: Detachable power cable included, speaker cable included Dust cover: M-COVR-00049 (sold separately) Weight: 18.8 kg / 41 lbs Width: 740 mm / 29.1 Height: 310 mm / 12.2 Depth: 210 mm / 8.3