Rock-solid, all-tube head that is made to travel. * Uncompromising sound with two 12AX7 preamp tubes and two EL84 power tubes. * Selectable BRIGHT or THICK mode switch provides EQ and Gain variations for just the right tone. * Dual-power tube mode offers 15 watt (Pentode Power) or 7.5 Watt (Triode Tone) operation. * Master Volume control preserves your gain settings at any playing level.