Orange Amplifiers AD Series AD30TC 30W 2x12 Tube Guitar Combo Amp Orange Controls: gain, bass, middle, treble, and master on each channel. Features: Twin channel (with silent switching) Output: Class A 30W (RMS) Tubes: Preamp - 4 x ECC83 double triode, Output - 4 x EL84 pentode, Rectifier - G234 / 5AR4 Speaker impedance: 1 x 16ohms, 2 x 8ohms