Hughes & Kettner TubeMeister 36 Tube Set
The Hughes & Kettner TubeMeister 36 Tube Set consists of 3 x 12AX7 preamp tubes and 4 x EL84 Power Tubes in a matched quad.
The Hughes & Kettner TubeMeister 36 guitar amplifier head offers independent gain and master knobs, as well as switchable FX Loop. With TSC (Tube Safety Control). It is an automated system that constantly monitors and readjusts the bias to ensure power tubes operate reliably and deliver to-die-for tone, always. With the TSC, swapping tubes couldn’t be any easier.
More information can be found here.