Black Glass British Fuzz


Black Glass – World Class Fuzz

Limited Edition of 14 Units

Hand Sanded and Signed

Available in OC75 or OC44 NOS Germanium

SKU: Black Glass Category:

Product Description



7 Each This Time with Mullard OC44 or OC75 Transistors!!!

November 28th, 2016 Edmond , OK.  Small Batch release.  rare OC75, and uber rare and vintage OC44 Made in Holland from the 1960s germanium transistors.  New Black and Red graphic.  Your chance to get a MkIII with Keeley touches.  Super Smooth, Articulate, Dynamic, Fuzzy!



September 24th, 2014 — Edmond, OK — Keeley Electronics today announced it is building the Black Glass British Fuzz effect pedal. The pedal will be limited to 30 units.  The 100% hand-built Black Glass is a modern compact circuit of the classic Mullard Germanium Transistor based design and was created for the most demanding fuzz effects lovers. The Black Glass offers a wealth of tone bending vintage musical MkIII sounds with reduced noise and treble response and a modern power supply.

With controls for FUZZ, TONE, and LEVEL the Black Glass makes it easy for players to dial in very wild amounts of fuzz. Modifications to the circuit allow for an increased high frequency not heard of before as well as ultra-low noise.  Furthermore, design modifications have solved temperature problems that can affect vintage fuzz units.  Players have the needed power supply inversion so that they can use a regular 9 Volt power supply.

“Our design team focused on building a MkIII style circuit with a stash of Black Glass OC81D transistors that Robert Keeley found.  This type of PNP Germanium pedal can be expensive, bulky, and can have variances in sound quality so our goal was clear: create a best-in-class product that combines compact versatility, repeatable musical tone, and low noise in a compact effect,” said Robert Keeley, founder and chief engineer, Keeley Electronics. “To achieve this, we employed several technical innovations from our Time Machine Boost and Holy Fuzz designs.  We also use techniques to nearly eliminate temperature coefficient problems in germanium designs.  The end result is that the Black Glass British Fuzz is vintage fuzz effect we are extremely proud of and excited to offer to our customers in this very rare and extremely limited edition and is ready for any stage, no matter how hot!”

Like all of Keeley Electronics’ designs, the Black Glass is hand-built in the USA using the finest components and construction techniques. It is housed in a beautifully powder-coated and rugged enclosure, includes true bypass switching, and features a 2-year limited lifetime warranty with world-class Keeley customer support.


All Keeley pedals include a one year parts and labor warranty!

For all repairs you must complete the Repair Ticket Form below before you return a pedal for repair. We only repair pedals that have been made or modded by us, or pedals that are going to receive our mod while they are getting repaired.

There may be repair fees for pedals that will be receiving mods or pedals that have malfunctioned from user error like plugging in wrong power supply, running over it with a truck, etc… Thank you for your cooperation!

Go to our Warranty Page to fill out a Repair Ticket Form.

Product Manuals


Fuzz Head
Keeley Compressor
Nova Wah
Seafoam Chorus
Time Machine Boost

Paul Priest – Slide solo using wicked amounts of fuzz

Next up, Paul doing some Turkey-Pickin’ with the Black Glass


Width (Not Counting Jacks) – 2.35″
Height (Not Counting Jacks) – 4.41″

Input / Output Jack Location – Side
DC Jack Location – Top

Order in Chain –

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