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: Obsidian Drive

Published: 25 September 2019 25 September 2019

 

   

Today we announce our new Obsidian Drive. The Obsidian Drive compares to the Blackstone MOSFET Overdrive, a pedal you may have overlooked unless you happen to be Billy Gibbons.

The Obsidian Drive gives you two channels of Marshall-ish overdrive. The Orange channel gives you the standard Volume, Gain, and Tone controls you would expect on an overdrive. The Tone control is really a mid-scoop control. At one end you get flat mids, and you scoop the mids from there. That channel goes from clean-ish to raunchy, full-on drive. The Volume gives you a slight boost, more with the Gain up, of course.

The Red Channel is similar for Volume and Tone. But the Gain is different. Minimum gain is at the middle setting. Dialing one direction increases gain in the usual way. Dialing the other direction increases the gain, but also cuts the bass. That may be good for dark setups or perhaps humbuckers. In addition to the two foot-switched channels, there is a MOSFET buffer you can switch on or off. We deviate from the original in that the Volume, Gain, and Tone for each channel is completely independent. The original shares a Tone control. We also have a couple of small options you might want to try out.

For details, check it out Obsidian Drive 

Or better yet, stop by our booth at the Amigo International Guitar Show in Ft Worth on Oct 5 and 6 and play it yourself!