Engl Special Edition E 670 100W Guitar Amp Head (6L6) Tube Driver circuit for effect devicesAlso serves as a separate 5th channel that can be selected directly (with or without EQ)Modern and Classic sound-shaping buttons determine the basic voicing of all 4 channels,2 gain variants for each of the basic channels: Gain Boost and Hi Gain3 voicing sections: one EQ for Clean and Crunch (Main Channel 1), one for Lead I and Lead II (Main Channel 2) and another for the Tube DriverEvery channel sports a dedicated Treble knobVarious sound-shaping buttons tu 6 basic sounds and 24 switchable sound options to store 128 MIDI presets From crystal clean to smooth jazz, from Texas crunch to pounding rock, from fat metal punch to screaming leads 100W of mega-power It doesn't get much better