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 Python compressor module.  The Python compares to the MIJ Boss CS-2 Compression Sustainer pedal.  The Boss CS-2 Compression Sustainer pedal is a classic among compressor pedals.  The controls are simple and the overall compression and sustain are considered more "natural" or "musical sounding" than many other compressors.  The circuit is similar to the older Ross and Dynacomp circuits, but differs in several ways to make it unique.  The CS-2 pedals were built from 1981 to 1986.  The CS-1 which came before and the CS-3 and others that came later are different.  Fans of the CS-2 still seek out the original vintage pedals, which have continued to be used by top artists for decades.

Compressors are sometimes described as the effect you shouldn't be able to hear when they are used correctly.  Perhaps compressors would be better described as the effect that makes your playing sound more like you intended it to sound.  Of course, guitarists have a variety of experiences and opinions about compression in general, as well as specific compressors.  The Boss CS-2 is no exception.  Some think it is the best compressor ever, others aren't so impressed.  We have a theory that compression is more specific to your setup and playing style than other effects.  If you have a relatively quiet rig and relatively smooth picking and strumming technique, a compressor may be more subtle.  But if you have a bit of noise, the noise can be made worse.  Or if you have a very dynamic picking/strumming style, you may not think the compression is at all subtle.  Perhaps the less you need it, the better it works...?

The one thing we know for sure is that the debate will continue.  To our ears, and with our setup and playing style, the Python is subtle, adding a very warm, smooth, and pleasant polish to our tone.  We can't tell it from our original MIJ CS-2 pedal.  It seems like both the highs and lows are very lightly trimmed to help smooth the tone.  The Attack, Sustain, and Level controls are all familiar to compressor users.  The Attack controls how quickly the compression begins.  Sustain controls how long it acts.  Level is a basic volume control.  If you turn up the Level and/or Sustain to the point where you are boosting the signal, then there is some increased noise.  But if you keep Level and Sustain closer to noon, there is little to no added noise.  The full range of Attack is reasonably subtle for us, but you may well have a different experience.  Also, as with most compressors, if you increase the Level, you may get some clipping distortion.  If you like the CS-2, but you find it clips a bit much with your setup, you might want to try our option to run it at 12V for a bit more headroom.  Once you try it, It's easy to see why David Gilmour uses the CS-2 to feed some of his amazing, smooth, and sophisticated fuzz and drive tones.

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