The HI-GAIN 100 guitar amplifier head uses the same clean channel circuitry of Hiwatt's coveted Custom Range Amplifiers, and add a contemporary overdrive circuit. The power amp section features EL34 tubes while the pre-amp features 12AX7 to dial in smooth overdrive up to all-out distortion with classic Hiwatt presence and richness. The HI-GAIN features push-pull switches for normal and bright settings, optional footswitch input for control of channel Hiwatt 4x12 speaker cabinet! Features 100 watts Dual channel: normal and bright Adjustable 4, 8 & 16 ohm output impedance Low and High sensitivity inputs Individual channel volume 3-band EQ