Inspired by the classic 4-stage Big Muff, the Imperial BC183 is built around a fine tuned high-impedance JFET preamp, and offers noteworthy volume cleanup and dynamics, while a trio of BC183 transistors provides gobs of detailed, mid focused gain. It features the classic BMP tone stack found in vintage muffs with the addition of a 3-position toggle that allows for a much finer degree of control over the midrange content.