The Hughes & Kettner Tube Factor is a powerful overdrive that uses real tubes operating at amp-level voltages to achieve an authentic tube driven tone. Offering two channels that can provide either thick, clean boost or blistering leads, the Tube Factor's controls for Drive, Voicing and overall Output let you tailor the tone to suit whatever flavor of saturation you need. For the ultimate in touch-sensitive, amp-like overdrive, you have to check out the Hughes & Kettner Tube Factor.