The 22-7 is a CMOS implementation of the Big Muff Pi with a flexible tonestack. It is designed to replicate the sound of the Electro-Harmonix Big Muff Pi, known for its rich and full fuzz tones. The gain and frequency response of each stage have been adjusted to match the BMP, resulting in a pedal that can produce classic fuzz sounds from the late 1960s.

The tonestack of the 22-7 has three modes: CLASSIC, FLAT, and SCOOP. The CLASSIC mode is designed to replicate the average sound of the BMP tonestack. The FLAT setting provides a more neutral tone, while the SCOOP mode offers a deeper and more scooped sound. This allows for a wider range of sonic possibilities and expands the pedal’s versatility.

The interstage coupling caps in the 22-7 are set at 100nF, which provides a balanced bass and treble mix suitable for both chords and soloing. However, if you prefer a heavier and fuzzier bottom end, you can replace these caps with 1uF. It is important to note that due to its high gain nature, good layout and cabling practices are crucial for optimal performance. Shielded cables are recommended for input and output wiring, and the entire circuit should be housed in a metallic enclosure to minimize AC mains hum pickup.

Summary created by AI from the original source.