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Scumback describes the M75 as being a warm, detailed midrange enhanced guitar speaker with smooth overdrive and distortion tones. Great sound right out of the box due to factory aging, design and break-in procedures. This is a superb tone and sound recreation of the G12M Pre Rola era "Greenback" that was used in Marshall stacks and combos, and many other British amps of the era such as Vox, Orange, Sound City.