Gerlt Technologies makes hundreds of customizable rack effects, at prices comparable to guitar pedals.  It's time to dump that pedal board and get Your Tone off the floor!

 

 What We Do

You know them as guitar pedals

We build them as rack effect modules you can customize to get Your Tone

Put several rack effect modules into a 3U rack enclosure

Connect power and audio on the back like guitar pedals, adding connections for remote switching

Add a remote footswitch unit to turn rack effects on and off

Add as many rack effect modules, enclosures, and third-party products as you like. Plug in your guitar and amp. Rock it! It's that simple.

 

Quick Hits:

  • Check out our GT Effects Overview to see why we do this

  • Check out our Compares To charts to see the full list of effects we offer

  • Follow the menus from Products, to Modules, to Modules By Type to get a list of our effect types.  Select any effect type to get a list of all our effects of that type.  Select any effect to get full information including pricing.

 

 

Hello Effects Fans!

Today the message is unpleasant.  After figuring how to deal with some of our government’s policy decisions for the past several years, I must finally admit defeat.  It is not feasible to continue operations with the latest round of policy changes.  As recently as a few days ago, I thought it might work out.  Then I was hit with business-ending tariff charges, with more to come.  To be clear, it isn’t just these new Trump tariffs that have beaten me.  Biden-era tariff changes and policies were also difficult to survive.  The cumulative effect is too much.  

As an entrepreneur I take calculated and managed risks.  Sometimes it works out, and sometimes I seem to be shooting at my own feet.  But I can’t survive an economic nuking from my own government.  It’s not just a political disagreement, or differing opinions, theories, or expectations.  It’s a matter of undisputed facts, real dollars.  Gerlt Technologies’ “Game Over” criteria were met this week as those facts became crystal-clear.  I don’t like politics and refuse to take part in it, so I’ll just leave it at that.

Gerlt Technologies will no longer take new orders for our effects.  We do still have our popular 3U Pedal Racks available until our inventory is depleted.  New tariffs on metals will make them too expensive to restock, so get ‘em while we’ve got ‘em!  I have a handful of new modules that I’ll be completing soon.  I’ll still announce them when they are finished, just ‘cause.  We were already contemplating thinning out some of our guitars, amps, pedals, and maybe some components and other gear that have somehow quietly filled up all our available space over the past several years.  We may add some listings for those on the site or perhaps on Reverb in the coming months.  Keep an eye on us if you are interested in some lightly used gear in great condition.  I expect and plan this shutdown to be permanent, but maybe I’ll pop up and take a look around in a couple of years if enough major changes take place in government policy after the mid-term elections.   

It has been a lot of fun!  I enjoyed meeting thousands of you along the way – always the best part of any adventure.  Thank you all, and all the best to you and yours!

Bill Gerlt

President, Gerlt Technologies

26 August, 2025

 

New Module Configuration: Woodstock 109

Published: 04 January 2021 04 January 2021

 

   

Hello, Effects Fans!

The holiday parties are over.  The confetti is swept up.  Now it's time to get back to work in what should undoubtedly be a better year than the last one.  But that doesn't mean the fun is over!  What could be more fun than building effects?  Playing them!  And that's just what you'll want to do.

Today we announce another new configuration of our Woodstock module, the Woodstock 109.  Seems like it should be similar to our Woodstock 108, right?  Well, sort of.  As you may know, our Woodstock module compares to the venerable Fuzz Face, one of the classic pedals of all time.  There are many variants of the Fuzz Face, roughly divided into the categories of "germanium" or "silicon", depending on their transistor technology.  The Woodstock 109 uses BC109C transistors, which are silicon transistors, making it generally comparable to our other silicon Woodstock configurations and the numerous silicon Fuzz Face derivatives that are available.  The BC109C is a great fuzz transistor, and we use it in other configurations, too.  However, the Woodstock 109 is most directly comparable to the Skreddy BC109 Fuzz.  In addition to the normal Fuzz and Volume controls, there are Voice, Bias, and HB/SC controls.  

The overall character is a raw ripper of a fuzz, but with the tone shifted down a bit to give that silicon sound a little germanium darkness and smooth off the edges a bit.  One unique feature is that instead of having two transistors like a normal Fuzz Face circuit, it has four.  There is a pair of stacked transistors in place of each of the two single transistors in the circuit.  The difference isn't huge, but it's there.  The noise generated by each of the transistors in the pairs sort of cancels each other out a bit, leaving you less noise in a high-gain silicon fuzz.  Perhaps just a small hint of extra girth or smoothness, too.  There's enough volume on tap to clear the tables near the stage in a club or get the neighbors to call the police again.  Like most Fuzz Face circuits, you'll probably keep the Fuzz maxed, or maybe backed-off just a bit, yet there is a range of less fuzzy options to explore.  It will get pretty clean if you back off your guitar volume, but it may thin out a bit as you lower your guitar volume.  The Bias lets you adjust the character of the fuzz.  It can go from rude and fuzzy, to ripping and aggressive, to rude and raw - but never tame.  The Voice provides a simple Tone control that gives you a range from dark and smooth to brighter and edgier.  And finally, that HB/SC switch - what's that about?  It refers to "humbuckers" vs "single coil".  When switched to the "HB" setting, the input level is trimmed down a bit, as are the lows.  That helps prevent the stronger and often darker pickups from getting a little mud on your tone, unless you like it dirty... yeah, you know you do.  A couple of extra internal components trim off some of the usual high-gain fuzz noise.  No fuzz is noise-free, but this one manages it better than most.  Just as Skreddy fuzz pedals are among the very best available, the Woodstock 109 is among our best for capturing that silicon Fuzz Face sound, with enough controls to give you a nice range of useful fuzz.

You can see the details about our Woodstock module at: Woodstock.  Or look for it in the Fuzz Modules section under Products -> Modules -> Modules By Type.

Have a warm and fuzzy 2021!