One of the first few NAMs I made was of a Marshall 8100, but when I did mostly all the controls (minus) the gain were @ 12 o'clock. The other day while at a guitar forum I was linked to a Youtube user video that supposedly had achieved the Chuck Schuldiner tone using only a guitar with a Dimarzio X2n pickup, a marshall 1964 cab with 75 watt celestions, an 8100, and a SM57 to mic the cabinet. I was so impressed with the tone I decided to make another NAM of my 8100 using his suggested settings. That contour knob seems to be the magic here offering a parametric eq like swoop. Here are the settings - "Bass: max (I called an audible here and made the bass 9) Mid: 4 treb: 5 Gain: max contour: 8 Volume: Max Master: 3 Interesting to note, that is also around the same settings supposedly Dimebag Darrel used on the Randall RG100 head - Bass max, mid 4 or 5, treble 5, gain max, presence 5, Master 3-4.
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