Carl Martin AC-Tone Overdrive Pedal 2 channels of overdrive Clean boost channel up to 20dB Built-in regulated +/- power supply The AC-Tone pedal offers 2 channels of overdrive, voiced alike for preset usage, and also gives you a clean channel with a boost of up to 20dB The overdrive is low to medium gain for a sweet and crisp tone with mellow midrange reminiscent of the old TopBoost amps from the late 60's