Hartke GT60C Guitar Amplifier GH Series The new Hartke combos come in two versions combining specially designed cabinets and speakers with the new Hartke 2-channel, tube-pre amp sections. The GT60c is a 60-Watt Combo driving a single 12-inch speaker with all the presence and tone you'll find in a classic amplifier design. Features: GT60c 60 Watt 2-Channel Guitar Combo with 1 x 12 speaker 12-AX7 Tube Pre-Amp Section with Independent Channel Gain Bass, Mid (channel 2 only) and Treble Controls for each channel Built in Spring Reverb and Effects Loop Send/Return Jacks ¼-inch Stereo TRS CD Input Jack; ¼-inch Headphone Jack Jack for channel selection footswitch