SKU: 51236850211
harmonic percolator pedal

harmonic percolator pedal Fredric Effects Utility Perkolator MKII

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Description

harmonic percolator pedal Fredric Effects Utility Perkolator MKIIFast Free Shipping No Taxes, Duties, Tariffs Free Returns $199 is your absolute final total here for the the Fredric Effects Utility Perkolator MKII pedal. This Utility Perkolator is Fredric's latest version of the highly sought after Harmonic Percolator from the 1970s, made famous by Steve Albini of Shellac. This MKII version pedal comes in a new triangular wedge enclosure and has some new features added as well. They added a ring modulator switch,

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$199 is your absolute final/total here for the the Fredric Effects Utility Perkolator MKII pedal.

This Utility Perkolator is Fredric's latest version of the highly sought-after Harmonic Percolator from the 1970s, made famous by Steve Albini of Shellac.

This MKII version pedal comes in a new triangular wedge enclosure and has some new features added as well. They added a ring modulator switch, for octavey/splattery overtones. This ring circuit is closely related to the vintage Dan Armstrong Green Ringer effect. Also, on the inside of the pedal, you will find 2 dip switches on the circuit board, to remove the low pass filter if desired (see "CONTROLS" below for details).

Demo Video:
Check out the awesome pedal demo video on this page.
Many thanks to Regent Sounds in London for this video!

 

Before we get way into the Utility Perkolator MKII, the next 2 paragraphs simplify the difference between the Fredric Effects Harmonic Percolator and their Utility Perkolator:

Fredric Effects Harmonic Percolator - this clone is the 100% vintage correct circuit, with the hard-to-find, new old-stock vintage components. It has the unpredictability of the vintage Harmonic Percolator on which it is based, with a raucous edge to the sound, and a fizzy decay note.
 
Fredric Effects Utility Perkolator - this is the result of experimenting with the Harmonic Percolator circuit for a few years. It uses lower leakage, old stock USSR germanium transistors, and incorporates a very subtle low pass filter, which takes the fizz out of the decay and makes it generally a "better behaved" Harmonic Percolator. However, it is still capable of some great, full-on fuzz sounds!

 

The Harmonic Percolator is a simple, yet fascinating circuit which readily lends itself to some tweaking. Fredric Effects already builds a faithfully vintage version of the Harmonic Percolator, however their Utility Perkolator MKII takes this circuit in another direction.

Using higher gain, lower leakage Russian Germanium transistors, and a low pass filter which only removes the high-end hisses and glitches associated with the Harmonic Percolator, the Utility Perkolator MKII has a considerably lower noise floor, and more predictable note decay. The result is a tighter and more controllable effect which is still capable of producing the classic Harmonic Percolator sound.

Reviews from our customers at Reverb:

 


CONTROLS:

Harmonics:
Controls the gain of the circuit.

Balance:
Controls the overall volume of the effect.

Si-Ge Switch:
Selects 3 diode clipping options.
Up - Silicon clipping for a smoother sound.
Down - Germanium clipping (like the original Harmonic Percolator) for a grittier sound.
Middle - No clipping, for a more open and less "fuzz" sound.
The overall volume will be higher with no signal clipping selected.

New for Version 2...
Ring Switch:

This engages a ring modulator switch, for octavey/splattery overtones. This ring circuit is closely related to the vintage Dan Armstrong Green Ringer effect.

Dip Switches on the circuit board inside the pedal:
R8 bypass, NR on - A simple, yet subtle low pass filter. By default (see photo of the inside), these switches are in the positions OFF, ON = low pass filter engaged. To disengage the filter, you can set these to ON, OFF.

 

MORE INFO:

Power Sources (each sold separately):
This effect is powered by a 9v, center-negative jack (like Boss, and most all other pedals use). Current draw is 10ma. Or it can use a standard 9v battery.

Warranty:
This product comes with the Fredric's 2-year limited warranty.

Shipping:
Ships fast! Usually same day, with Free UPS Shipping in U.S. with tracking (1 biz day processing, 1-3 business days transit time usually). 1 and 2-Day guaranteed shipping are also available.

Our added value, when purchased here at coolguitarshop.us:

  • Best total price: $199 is your absolute final/total, with Shopify Secure Checkout
  • Fast Free Shipping in U.S.
  • No Sales Taxes, Duties, or Tariffs (We pay all of these for you.)
  • No Risk: Try it on your own rig for 30 days. Don't love it? Return it for a full refund... no hassles, no costs. (We'll email you a pre-paid return label.)
  • Rock-solid customer service, 365 days a year

Enjoy the upgrades, and get into those classic sounds of Steve Albini and many others, with the Fredric Effects Utility Perkolator MKII.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51236850211

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Sukoshi
West Palm Beach, US
★★★★★ 5
Best socks for work or working out.
Size: One Size, Color: (015) Tetra Gray / Gray Matter / White Quartz
Great socks. They stay on your heel! Love the material; breathable and not thick. Love the neutral tone colors.
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Reviewed in the United States on January 1, 2025
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Cassandra Moxlow
New York, US
★★★★★ 3
Didn’t meet full expectations
Size: One Size, Color: (001) Black / Black / Jet Gray
Much shorter than anticipated.
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Reviewed in the United States on December 16, 2025
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shannon oakley
Lowell, US
★★★★★ 5
Great room divider
Color: Black, Size: 4 Panel-88'', Color: Black, Size: 4 Panel-88''
This is a room divider and would work great as one! I’m using it as a cover for my car port/garage so you can’t look in and see my messy garage as easily and for what I’m using it for it’s a little not quite as sturdy as I need it to but I’m sure it’s not meant to be used outside anyways so I don’t fault the product since I’m not using it as intended… with that said though…. It still covers my garage beautifully and really does exactly what a I need it to! I’m sure the wind may blow it over if it gets too crazy but I don’t see it breaking by any means. The frame is metal and drilled together using long screws. It’s very well built. The cloth for the panels is this waterproof type material that’s kind of like the gazebo roof feeling. So it’s easy to clean and it’s easy to wipe. You can put it straight or bend the panels and either way it still stands up. You don’t HAVE to bend it to make it stand or anything. You can literally use it straight across like I am in the pictures. Overall very happy with this product and it’s also very tall so it truly covers a lot (hides a lot lol). I’m 5’8 so you can see it’s taller than me by the pic I took
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Reviewed in the United States on May 4, 2026
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3fingers
Carnegie, US
★★★★★ 3
OK. Drag to setup. Needs more stable feet
Color: Black, Size: 4 Panel-88''
I was glad to find these. The benefits of having them in a recording setup is helping suppressing noise for a vocal booth. It's a layer that surrounds the recording box. Nice! (But away from audio hardware or DAW). Here is the not so nice part: The feet! It's able to stand (as it needs to do this). But it cannot be bumped. If it does, it's coming down onto something. I believe the feet units are not wide enough (or long enough). That makes for an easier tumble risk. So far, they haven't, but it's like being in the woods over leaves - it feels dangerous with every step! (That's actually true). They are tall enough, wide enough, material OK. But the feet for the main assembly do not seem sturdy enough. There are ways to help that. I'm thinking a 2x4 to augment the base. Make them wider. It can be done. It was a drag to set these up, and I'm sure to modify them like i'd want them. But, they do come in at a much lower price that other similar dividers. Consider all this because I've seen more solid dividers ( with padding) that would basically be the 1/2 cost of these. But i'd think they'd be easier to assemble, stand sturdier, and without that feeling of an impending fall (or fail). This is my opinion. I hope it helps.
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Reviewed in the United States on May 29, 2026
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Amazon Customer
Los Angeles, US
★★★★★ 1
wrong size of metal components. incorrect items. non functioning
Color: Black, Size: 4 Panel-88''
The owner of this product sent me the incorrect pieces when I tried to install. It didn’t fit. The pieces were missing holes and once I connected the wrong pieces after knowing now they’re stuck and I can’t return them even though Amazon was kind enough to refund me. I just want to warn people this product is such a disappointment because it looks good. It’s good price, but you can’t even assemble the thing very disappointed.
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Reviewed in the United States on May 31, 2026

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