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




Yes! It’s time for another new module. Our new Black Pearl module compares to the vintage Pearl CH-02 chorus. The music of the 80’s included many effects-laden guitar parts, with chorus being one of the most popular. It can make guitar (and other instrument) parts big and spacious, perfect for both 80’s pop and arena rock. If it hadn’t been the 80’s, a time of fun and excess, some might say that chorus was perhaps a bit over-used, and often used in an over-the-top manner with high levels of modulation and depth. Perhaps, but it certainly contributed to a great deal of good music that is still popular decades, and generations, later.

Perhaps that over-the-top chorus doesn’t really fit in with today’s music, or even classic rock, blues, country, jazz, and grunge of any time. In that case, you need a “sensible” chorus. The Pearl chorus, and our Black Pearl module, may be just the chorus you’re looking for. It won’t take you into the seasick or spacey zones. All the settings of Speed and Depth are very usable and provide a range from subtle to deep. A Tone control on the wet path gives you the ability to tweak the color a modest amount. The Mix control gives you everything from the lightest hint of chorus at one extreme, “normal” chorus in the middle, and a vibrato-like effect at the other extreme where the dry signal is mostly removed. The Pearl chorus was much loved by those that knew of it during its production years, and is still a sought-after used pedal today because of its great “no nonsense” effect delivery.

Look for more information about the Black Pearl module see: Black Pearl

We have several additional new modules that are ready to go, and we’ll be announcing them in Q1. Now don’t go looking through our website for them and getting ahead of our announcements! We have somewhere around 230 module configurations listed, comparing to around 260 pedals, so that would be a lot to sort through :^)