Boston's pedal builder Source Audio in the last few years has seemed intent in focusing on products that take the most purely "tonal" effects to the next level. After the EQ2, a programmable equalizer, comes Zio, a multi-voice analog preamp/boost designed in collaboration with Christopher Venter, the owner and sole engineer at SHOE Pedals, who previously worked with DOD on the Looking GLass overdrive.... Click on the title for more