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: FlatTop

Published: 19 September 2019 19 September 2019

 

   

OK, all you metalheads out there, this one’s for you!

Our new FlatTop module compares to the Wampler Triple Wreck, which is designed to give you those killer high-gain tones you might normally find in a Peavey 5150 or Mesa, which are cousin tones to the EVH Brown Sound and Marshall high-gain tones. All a bit different, but all a bit similar, too. The FlatTop is a high-gain, metal monster. If you dime the Level, Gain, and/or some of the Bass/Mids/Treble tone stack, you will undoubtedly overload the front-end of your amp and get a squealing out-of-control mess of feedback and amplified noise. Start backing off from that point, and you’ll find your metal tones. Screaming leads, no problem. Chugging chunkin’ palm-muted power cords, no problem. Super-sensitivity and harmonics – yep. When it comes to gain, this module has more than you can safely use. First time we tried it out, all our fire alarms went off – really! Turned out not to be related. Yeah, sure it wasn’t – this thing is hot. Plus it weighs *a lot* less than our 5150 combo and our Mesa and Marshall half-stacks.

This module is about the gain. But if you dial the gain down, you actually end up with some reasonably clean low-gain tones. It does not clean up with your guitar volume – only with the effect Level control. The Bass/Mids/Treble tone stack gives you opportunities for scooping the mids, boosting the bass and/or treble, or whatever you need to do to create your own sonic mayhem. And if that isn’t enough, there is, wait for it... a boost. It’s a funky boost. It does give you a bit more volume, but it is actually more like a second tone stack, or a “contour” or “voice” control. It has a bigger impact on the tone than the gain and volume. Some may not care for that boost, since it takes a while to adapt to it. In that case, we offer a couple of our other boosts as built-in options. You would likely only find a normal boost usable at lower gain and level settings, since the main circuit has such high gain.

These is also a Vintage/Modern switch that changes between full highs and trimmed highs so you can choose how brutal you want to treat your speaker cones.

Stop by our booth at the Amigo Ft Worth Guitar Show on Oct 5 and Oct 6 to give the FlatTop a try, along with some of our other new modules. You can see more details about the FlatTop at FlatTop. Also take a look in our Amp Sim modules to get info about some other high-gain modules we offer for when it is time to get brutal and melt some faces.