PROVIDENCE HBL-4 HEAT BLASTER distortionThe new Heat Blaster HBL 4 became more powerful distortion pedal with rich harmonics for a more aggressive distortion going from classic rock to modern hard rock. Its edgy aggressive sound got closer to the high gain tube amp sound while retaining picking nuance vividly. An internal circuitry doubles the 9V supply voltage to 18V, achieving wider dynamic range and more amp like sound. With its SCT circuit (Single Contact True bypass), the audio passes