The 30W Orange Amplifiers Dual Terror DT30H tube guitar amp head boasts twin all-tube channels. The Orange Dual Terror amp head also offers a unique 2-stage preamp with massive tonal range using just 3 controls per channel. The Orange Dual Terror guitar amp switches from 30 to 15 to 7 watts making it a highly versatile portable amplifier for both studio and stage. The Dual Terror's Fat Channel delivers warmer tones while the Tiny Terror Channel has the sonic character of the original Orange Tiny Terror amp. Note: The Orange Dual Terror DT30H amp head does not require rebiasing when replacing power tubes.