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




Those of you that have stopped by our booth at a show know that we have third party tuners, pedals, and noise reduction systems in our demo racks. We only use the tuners. The other third party stuff is just there to show some good options for other gear you might want to consider when you move to a rack setup. Those tuners, pedals, and other third-party equipment have one annoying downside – they each require a transformer, or “wall wart” for power. Since we also have good third-party power conditioners in our racks, we have plenty of outlets to plug in those transformers. The problem is there is no good way to secure them. When we move our rack cases around, pack them in trucks, turn them upside down, and generally mistreat them, those transformers come unplugged and bounce around, potentially damaging the transformer or anything it bounces into. Not good! Those transformers can also be a source of annoying power supply noise that can easily find its way into the audio signal. Also not good! Some transformers are either too large or have a poor physical design, making it difficult to even plug them in to some power conditioners. That’s just downright annoying!

Now we have a solution for those problems – the Warthog. The Warthog module takes in a standard GT 18V Power module feed, just like our other modules. It then converts that into four different output channels. You get to choose either center positive or center negative polarity, and the voltage for each of the four output channels. Voltages are all DC, not AC, and are regulated to about +/- 10%. Common choices include: -9V (100ma), -3V (100ma), -1.5V (100ma), 5V (100 or 1000mA), 9V (100 or 1000mA), 12V (100 or 1000mA), 15V (100 or 1000mA), and 18V (100mA). Other configurations may be available – let us know what you need. You can daisy chain from these channels, up to their mA limits. You can use both positive ground and negative ground effects, but not on the same channel. The Warthog is intended to be used with our 18V Power module, so that we do not have to duplicate some of the protection circuitry provided by the 18V Power module (and lose some power in the process). However, we can add a protection board so you can power it from a third-party power supply if you prefer. Using it with the 18V Power module gives you the ability to see your mA usage so you can balance your power consumption and not exceed the maximum number of mA for the Warthog or 18V Power channels.

For more information and details see: Warthog