Mesa/Boogie Walkabout Scout 300-watt 1 x 12" Bass Amplifier Combo/Convertible Bass Head Features:300-watt 1 x 12" tube bass amplifier and convertible bass headHandbuilt in Petaluma, CaliforniaSimul-State power, 6 tube-driven power MOSFETs, 2 x 12AX7s, and an active/passive input switch4-stage vacuu..