JHS - "2015"
The JHS Muff is a JHS original take on the classic circuit. You will find this version more powerful and less compressed, with a more haunting midrange. It is also the best for bass guitar.

- ‘73 RAMS HEAD - “1973-1977 V2”
The ‘73 Rams Head gets its name for the strange little face that appears on the lower right corner of the original pedal. It is best known for having a scooped midrange, less gain, and being darker.
Famous users: David Gilmour (main Pink Floyd recordings), Ernie Isley (Isley Brothers), and J. Mascis (Dinosaur Jr.)

- THE TRIANGLE - “1969-1970 V1”
The Triangle Muff is so named for the triangle arrangement of the knobs. It boasts more low-end response while being more articulate.

Famous users: Santana, David Gilmour's Pete Cornish-made pedalboards, John Lennon, Kevin Shields (My Bloody Valentine), and possibly Jimi Hendrix.

- THE PI - “1977-1978 V3”
An instantly recognizable red Pi symbol gives this pedal its moniker. This is not to be confused with the later redesigned NYC version released in 2000. It features a more aggressive sound.

Famous users:  Frank Zappa, Billy Corgan (Smashing Pumpkins), Jack White, The Edge (U2), Beck, and Pete Townshend (The Who).

- THE RUSSIAN - "1999-2009 V8”