Xotic EP Booster Clean Boost Pedal – That Pedal Shop
Fire Bottle Tube Boost Guitar Pedal - built in the UK by Effectrode
Amazon.com: Sondery Boost Pedal for Electric Guitar and Bass, Mini Clean Booster Effect Pedal, True Bypass, More or Less 14dB Change for Frequencies Under 250Hz or Above 1KHz, Art Design Foot Pedal :