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!

In my last update I was excited after finding some small quantities of critical components that are needed to build our effects. I hoped that to be a sign that perhaps some of our supply chain problems were easing. But it seems those were just one-off lucky finds. I haven’t found any more since then. On top of all the other problems, we now have the ripple effect of the conflict in the Ukraine, which has caused even more parts to become unavailable and/or very expensive.

It’s one thing to be optimistic, but another to be unrealistic. This is no longer a time for simple optimism. It is a time for handling unpleasant realities. Our reality is that it seems very unlikely that enough positive changes will occur quickly enough for us to re-open in 2022. While the corporation is in a good position to weather a continued lengthy shutdown, the people are not able to. We need to take some time to go do “other stuff” for a while.

We still have several new modules to announce. The work is complete on almost all of them, so I’ll try to get those announcements out in April and May. Other than that, I’m afraid it is going to be pretty quiet here until we are able to reliably source parts at reasonable prices again. I probably won’t have another update until late summer or into autumn.

The good news is that Gerlt Technologies is still here and alive. We haven’t “lost” anything. We still have the largest selection of rack effects available, getting close to 400. Our effects still sound great. And we still want to make them available to you. We’re just going to have to continue our break for a while until the business and economic conditions improve to the point that we can provide outstanding products and support at affordable prices.

I apologize for the continued delay and will do everything I can to get us going again as soon as it becomes feasible.



Bill Gerlt

President, Gerlt Technologies

Dallas, Texas

11 April, 2022




Hello, Effects Fans!

Today we announce our new Nachos module.  It compares to the EHX Hot Tubes.  The EHX Hot Tubes pedal was released in the mid to late 70's.  There are two very different versions of the pedal.  One used two 12AX7 tubes.  The other used CMOS chips instead of tubes.  Both are good pedals, but for this module, we're focused on the CMOS chip version, which should maybe have been named Hot Chips instead of Hot Tubes.  Our Nachos module compares to the CMOS chip version of the Hot Tubes.  Fans of Sonic Youth were driving up the price of the original old pedals, but EHX has recently re-issued a new version in their Nano line of pedals.  The original may have also been used occasionally by SRV, although he probably never recorded with it.

The circuit uses an inverter chip to produce its distortion.  That makes it a "tone cousin" to our BuzzDrive module, which has configurations that compare to the Way Huge Red Llama, Mad Professor Stone Grey Distortion, and Way Huge Fat Sandwich, among others.  All these circuits get their flavor of distortion from inverter chips.  Somehow, inverter distortion can remain articulate with good note definition, even when it is cranked up.  It can also handle more bass than usual without getting muddy, making inverter-based circuits a good choice for bass players.  While these circuits are usually labelled as "distortion", they often top out and run best in the overdrive range.  At low drive settings, the circuit is pretty clean.  And at max drive, it is still more overdrive than distortion.  The Volume will let you drive things pretty hard further along in your chain, which causes it to seem to contribute to the module's distortion, but it doesn't.  It's just abusing whatever comes next in your chain.  Your guitar volume helps provide some control on both the volume and the level of overdrive.

The Nachos module stays true to the simple original.  There are the basic controls for the level of drive and volume.  There is also a Tone control, but it can be bypassed with the Tone Bypass switch.  We left off the direct output of the original.

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