Egnater Tourmaster 4100 100-watt Tube Head MAIN FEATURES100-Watt All-Tube HeadFour Channels with Selectable voicingPower Grid: Set Wattage for Each Channelfrom 10w up to 100wTube-driven Assignable Effects LoopTube Driven ReverbRugged Six-Button FootswitchPowered by GroovetubesFRONT PANELFour independent channels each with: Gain control; Master control; Treble, middle, bass; Classic/modern voicing switchTube driven reverbMaster Presence/DensityREAR PANELAssignable tube driven effects loop: Assign to channels 1&2, Assign to channels 3&4, A Clean/Vintage 1 is the cleanest of the four Within this channel lives a range of Classic tones ranging from pristine sparkle with the voicing switch set to MODERN to a punchy, aggressive drive (think clean JTM) in the CLASSIC mode Pressing the button to activate the CONTOUR control opens an entire new range of beautiful clean, almost acoustic, tones not often found in a tube amplifier Clean/Vintage 2 has a very similar voicing to the Clean/Vintage 1 channel