Like new this thing is pristine . Amazing amp all the models, and all the bells and whistles!!

Channel 1: Rhythm PlaygroundClean Mode: Pristine headroom. Keep the Gain around 10:00–12:00 for sparkling tones.Fat Mode: Adds significant low-end girth. Reduce the Bass knob if it begins to sound muddy.Crunch Mode: Classic rock overdrive. Increasing the Gain will deliver aggressive classic rhythm structures.Mid/Boost Control: Functions as a standard mid control from 0 to 5. Turning it past 5 engages a variable preamp gain boost for extra thickness.

Channel 2: High-Gain LeadMark IIC+ Mode: Tighter, drier, and highly articulate metal distortion. Perfect for fast rhythm tracking.Mark IV Mode: Thicker, creamier, and richer mids. Ideal for sustaining fluid solo lines.Extreme Mode: diminshed negative feedback maximizes attack, low end, and saturation

.Golden Rule of the Mark Series EQThe rotary Bass, Mid, and Treble knobs live before the gain stage.

They act as a distortion shaper rather than an output tone modifier.Keep Bass Low: High gain with high rotary Bass creates a flubby, loose attack. Keep rotary Bass between 9:00 and 11:00 for heavy tones.Use the Sliders for Output Tone: Use the 5-Band Graphic EQ sliders to shape the final sound. The classic "V" shape (scooping the 750Hz slider down, boosting 80Hz and 6600Hz) delivers the definitive heavy rock and metal sound.