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: Angus

Published: 10 July 2020 10 July 2020

 

   

Hello, Effects Fans!

Today we announce our new Angus boost module.

There aren't many effects that are prized for messing with your tone when they aren't supposed to.  Often that is known as "tone suck", and for good reason.  But there are a couple effects that apparently "tone suck" all the bad stuff out of your tone, leaving it better than it was.  The preamp of the EchoPlex 3 is famous for being one of those effects that make your tone better even when it is off.  But there is at least one more...

The Angus boost compares to a portion of one of the earliest wireless systems to be adopted by some of the big stars, such as Van Halen, Pink Floyd, Kiss, Styx, The Rolling Stones, ZZ Top, and AC/DC among many others.  That wireless system was the Schaffer-Vega Diversity System.  Artists used it primarily because it was the first reliable wireless system that let them roam free on big stages. 

One artist in particular, Angus Young, found that his studio sound was missing something that he liked in his live sound.  Turns out it was his wireless system.  It gave him a tone tweak that provided him that little extra "umph" in his live tone.  Adding his wireless system to his studio sessions gave him what he wanted, that sound we all love when he grabs his SG.  It was used on AC/DC albums from '77 to '84, including, of course, Back In Black.  If you have been using an SG and Marshall to get his famous AC/DC tone but haven't quite nailed it, this may be that missing ingredient.

The Schaffer-Vega Diversity System was introduced in 1976, but went out of production in 1981 due to changing FCC rules.  Only a bit over 1000 units were ever produced.  Many artists discovered the "magic" of the system and used them for a number of years, even after they were no longer available.  SoloDallas began making those vintage systems again in 2014, as well as some pedals that dropped all the wireless functionality, leaving only the tone-shaping portion that is left when the wireless is removed - that same circuit that Angus found necessary to get his live tone in the studio.  Our Angus boost compares to the SoloDallas Storm pedal, and also compares directly to that portion of the original Schaffer-Vega Diversity System.

The controls are straightforward.  There are simple input and output level controls to manage the signal boost and resulting volume.  The Threshold knob controls an optical limiter.  One direction gets you quick response, the other direction loosens things up a bit.  Depending on your settings, you may get a little dirt from the module itself, but more likely you'll be driving something else pretty hard, like your amp, to get most of the drive and distortion.

It's a bit of a one-trick pony, but it's a pretty good trick.  It is similar in idea to effects that emulate the EchoPlex 3 pre-amp, such as our FBomb.  Both are candidates for "always on" effects in your chain to sweeten up your tone regardless of what else you may have going on.

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