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 introduce The Prince flanger, which compares to the Boss BF-2 Flanger. Prince was one of the great musicians and entertainers of all times. He composed his own music, played all the instruments on some of his albums, wrote songs for and sponsored numerous other bands, won Oscar and Grammy awards, and even took on the big labels in the music industry. And, yes, so enraged Tipper Gore that albums now have to carry ratings reflecting someone's opinion of their content. He was also an accomplished guitarist, although that often went unnoticed among all his other talents. He was particular about his sound, and to the surprise of many, was able to achieve his funky, rock vibe with a collection of inexpensive Boss pedals. There's often a lot going on in his music, but the Boss BF-2 Flanger seemed to be one of his go-to pedals.

Prince wasn't the only player to use the BF-2. Many guitarists in the 80's used it, including Robert Smith of The Cure, David Byrne of The Talking Heads, Johnny Marr of The Smiths, and Billy Duffy of The Cult, as well as many other well-known players such as Ernie Isley, Jeff Beck, and Rory Gallagher.

The Boss BF-2 Flanger, was probably the most popular flanger upon its debut in 1980 and still remains popular to do this day. In spite of several cosmetic changes, the circuit stayed almost exactly the same from 1980 to 2001, when it was replaced by the BF-3. It was so popular that you probably know its sound, even if you don’t realize it, particularly if you listen to music from the 80’s. Not everyone thought it was the best flanger available, though. To some it could sound a bit harsh or metallic. The Prince has options you can select to change up the tone a bit, including reducing the harshness, reducing the noise, and increasing the “swoosh” by chopping the delay time in half. Like Prince, we like the original BF-2, but prefer the GT version with its available mods.

Check it out at:  The Prince


(PSSSTTT... Hey, Buddy! Yeah, you. Come over here. I wanna tell ya something. I heard GT has another great flanger in the works. Some might think it is approved by the American Dental Association, but it’s not... Just sayin’. Now be cool, and don’t go blabbin’ about it...)