Specifically tuned to the sound of a block-buster 1979 album (okay, it's "The Wall") and emulates the "magic" 70's era fuzz pedal that was somehow clear and articulate on high notes while still fuzzy and aggressive on low notes, without excessive low-end muffiness or high-end fizz.  The mids are scooped just enough to keep it from sounding congested, the lows are rolled off just enough to keep it from sounding wooly or boomy, and the highs are gentle, present, and well balanced.

Its clarity will encourage you to dig in and express yourself; it's not an overwhelming "wall of fuzz" type effect.

A wide variety of aggressive and clear-sounding applications, particularly excelling in sustaining, biting, legato lead work

Demo by JetCityMusic

Demo by Greg's Guitar Lessons

Demo by Brett Kingmann

Demo by VJN Sound

Product Page

Review by reddit /guitarpedals

Review by guitar pedal X

Review by The Gear Page

Review by Musiker-Board

Adjustable but not refined—an angry, raw, vintage-style 2-transistor fuzz with extra controls and tweaks to let you recreate oodles of classic fuzz sounds with minimum hassle
The Skreddy Pedals™ BC109 FUZZ is made from silicon transistors for power and temperature stability, but it's darkened so you can get germanium-ish effects out of it too.

The 2 transistors are piggybacked for better tone (smoother, lower noise than single transistors), giving this circuit 4 transistors total. 

Demo by Bluesful

Demo by The Tone Unknown

BC109 Fuzz

Aggressives Silizium-Fuzz mit großer Bandbreite, einschließlich Clean, Overdrive und Distortion

Aggressive silicon fuzz with huge range including clean, overdrive, and distortion

Demo by Robert DeVito

JetCityMusic

Official Website

Manual

Lunar Module mini deluxe

Based on the "triangle-knob" circa 1971 4-transistor fuzz, but I've changed the input capacitor to a more saturated-sounding type like the circa 1973 'rams head' version fuzz. From there, I've tightened up the bass and smoothed out the highs and eliminated the mid scoop. So instead of a raging wall of fuzz, you get a more focused and amp-like tone, without having to stack with eq's and/or other overdrive pedals to smooth things out or bring up the midrange.

Demo by  sukuta takafumi

Demo by  Vintage Stompboxes

Pink Flesh

Hot blues/rock tones at your fingertips with emphasis on snarling yet transparent cranked-amp sounds; perfect for Page and SRV and any sweet, cleanish overdrive you'll need--this just works.
Goes from chimey to raucous with your guitar volume and responds to your picking intensity with nuance and authority.  Plenty of twang and sparkle that doesn't get lost behind the dirt!

Demo by Guitarsenal

Demo by shnobel