Vox AC4C1-PL 1x10" 4-Watt Limited Edition Purple Tygon Tube Combo Output Power: 4 Watts RMS into 16 Ohms Tubes: Preamp: 12AX7 (x2) Power: EL84 (power) 10" Celestion Speaker Gain, Treble, Bass, Volume controls Input , External Speaker output terminals