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, Everyone - We're back! Welcome to a brand new decade! We’re kicking it off with a new module announcement today.

For some reason, there are a few great Maxon effects that players in the USA may have missed. The Maxon DS-830 Distortion Master is one of them. Our GT-830 compares to this largely undiscovered pedal. The individual sections of the circuit are generally unremarkable in design, including input and output buffers and silicon diodes in both hard and soft clipping configurations. But there is a unique active tone stack providing independent Bass and Treble controls with a wide range of effect. The overall tone purposely highlights the low end, and tends to be a little warm and dark, especially when the Gain is low. It is meant to provide a solid bottom and some fat. The Gain provides a wide range, from almost clean, through overdrive, and into distortion. With the GT More Gain option, the Gain range extends well into hair metal tones, with plenty of touch, feedback, and harmonics. The Gain cleans up pretty well with the guitar volume, but don’t expect pristine cleans at any settings. The gain is enough to hit the front end of your amp or downstream pedals pretty hard, enabling amp break-up or meltdown, should you choose it. The character of the gain is somewhat Marshall-like, although clipping diode selection can change it up.

Since it is designed to fatten up the tone and provide a nice tight bottom, the circuit can sound dark, particularly with humbuckers. The wide range of active tone control will counter that, but even the tone stack is purposely skewed a little to provide more control over the lows than highs. The stock silicon clipping diodes are good, but red LEDs and no clipping diodes at all both yield brighter tones, although the character of the distortion also changes. In other words, clipping options are worth considering, maybe even more so for humbuckers than single coils. If you already have a bass-heavy tone, this may give you some good shaping options or push you into the Dark Side. If your tone is a bit thin or bright, this can give you some nice bottom end to fill things out a bit. Fat-bottom tone makes the rockin’ world go ‘round!

Check it out:  GT-830