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: OverBoost

Published: 17 March 2022 17 March 2022

 

   

Hello, Effects Fans!

Today we announce our new OverBoost module.  It compares to a family of boost pedals from Xotic Pedals.  The OverBoost comes in 8 different base configs that compare to the Xotic BB Preamp (current model), Xotic BB Pream AT (Andy Timmon, original models), Xotic BB Preamp Bass, Xotic BB Preamp MB (Mids Boost Custom Shop model), Xotic BB Preamp Comp (Compression Custom Shop model), Xotic AC Booster, Xotic RC Booster, and Xotic RC Booster Bass.

The RC, AC, and BB configurations cover a range of clean to dirty boosts.  The RC or "really clean" covers the space from clean to gritty to mild overdrive.  The AC starts at an "almost clean" level and goes up to crunchy overdrive.  The BB, aiming for the range of a Marshal Bluesbreaker amp, covers the range from cleanish/gritty to full overdrive.  Most guitar and bass players have probably had the opportunity to try at least one of the pedals in this family.  They are great boosts at reasonable prices.  Where they really shine is in giving you fine control over how much you push the front end of your amp, especially if you have a tube amp.  Depending on which you choose and how you dial in the Volume and Gain, you can get a nice, fat clean boost that gives you "more of what you've got", or you can push your amp into varying levels of break up, or shove your amp over the edge into heavy, chunky overdrive or distortion.

The circuit is similar to its tone-cousin, the Ibanez Tubescreamer.  But it has some important differences.  The BB replaces the Tubescreamer Tone control with a fixed resistor, adding a new tone stack after it that gives you great Bass and Treble controls.  These two controls also allow you better control over your mids.  The MB version puts a Mids control back into the Tubescreamer-like tone stack in place of the fixed resistor, in addition to providing the additional Bass and Treble controls.  Different types of clipping between the original/AT version and the current version yield similar but slightly different gain levels, sometimes described as different levels of compression.  The AC and RC versions leave out the old Tubescreamer tone stack completely, replacing it with the new Bass/Treble tone stack.  The AC and RC versions also differ in clipping configurations to yield cleaner base tones than the BB configuration, with the RC configuration being the cleanest of the three.

The new tone stack is important to dialing in that level of clean to dirty boost that you want.  At different levels of dirt, you will likely need to adjust different frequencies to get the tone balance you want.  A single Tone control may not be sufficient for that level of fine-tuning.  The Bass/Treble tone stack in this circuit should do the trick, especially if you opt for a configuration that includes the Mid Boost control.  An optional second channel will let you switch between two different Gain settings.

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