Mieda's servo-bias circuit was further developed by former Vox lead engineer Steve Grindrod. Utilizing a single 12AU7 preamp tube, Grindrod's refined servo-bias design was featured in all seven CoolTron pedals. While all seven pedals shared the same servo-bias tube circuit, each pedal was equipped with a unique solid-state front-end circuit tailored to the pedal function. CoolTron pedals were designed to operate for a minimum of fifteen hours on a set of four alkaline AA cells.īulldog Distortion - Released in 2005, the Bulldog Distortion had two distortion channels, each with it's own gain and volume controls. The first channel had a traditional, vintage fuzz tone. Channel two had a more aggressive "shredder" fuzz tone with scooped mids. The Bulldog Distortion had seven controls: Gain 1, Gain 2, Gain 2 Voice, Volume 1, Volume 2, Bass and Treble. ![]() Also included were a channel (Gain 1/2) foot switch and a true bypass effect foot switch. ![]() MSRP was $249.99.īig Ben Overdrive - With just three controls, (Gain, Volume and Tone) the Big Ben Overdrive offered the simplest panel layout of all the CoolTron pedals. The Gain control adjusted the overall gain of the pedal from bluesy and mellow to fat and saturated. The Tone control altered treble response while the Volume control regulated the total output of the overdriven signal.
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