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.

 


UPDATE 10/26/26 

Hello!

I hope all is well with you and yours as we head into the holiday season, starting in a few days with Halloween!  Gerlt Technologies will soon be on our holiday schedule.  You can contact Support at any time during the holidays, but we will not be shipping new orders starting December 15 and continuing through about January 22.  We should be back to normal shipping the last week of January. 

Check out the extensive list of about 200 guitar pedals that I recently got up to our website, along with some exotic handmade guitar straps and the ever-popular 3U Pedal Racks that are now back in stock (black matte finish only).  It took me a lot longer than expected to get all the pedals listed, plus some other projects took up my time.  As a result, I didn’t finish up the Custom Muff Tone Device pedals, or get the guitars, amps, and other rack gear listed – next year!  Anyway, check out the current listings and maybe forward a URL or two to Santa so there’s no mix-up about what is on your list!  Get your orders in early so we can ship them before our elves go on holiday!

For those of you that haven’t done business with GT before, it’s simple.  Send an email to our Support address with your shipping address and let us know what item(s) are of interest.  I’ll send you an exact price with shipping.  If you want to purchase, then send a PayPal.  We ship only to US addresses via USPS, with insurance and tracking.  If you have any questions, you can send those to Support.  We usually get back within 24 hours unless we are on holiday schedule.

If we don’t hear from you before then, we wish you a safe and happy Holiday Season and best wishes for the coming New Year!

Cheers!

Bill

 

 

 

UPDATE 9/24/26 - Hello Effects Fans,

We are finally restocked on the 3U Pedal Racks.  These all have the black matte powder coat finish.  Shipping now!

Don't forget, you will see a new menu item for Other Gear.  There are sub-menus for some different categories of equipment.  I’ve just added over 200 pedals out there.  Many of them are rare/uncommon, old, popular, or generally interesting – among the best pedals made over the past several decades.  I’ve spent years building up this collection of great pedals, but it is time to turn them loose so they can find a better purpose than filling up space I don’t have to spare.  Check it out.

And if you look in Other Gear under Misc Gear you will find listings for some handcrafted guitar straps.  I used to make them years ago and have a few NOS ones for sale.

This part of the website is new and changing, so if something looks broken or missing, give it a day.  If problems persist or you have any questions or comments, just contact me at the Support email address.

As I get time, other gear will be listed – guitars, amps, pickups, electronics components, more pedals, demo modules, etc.  Check back now and then to see what I’ve been holding back all these years!

Cheers!

Bill

 

Hello Effects Fans!

Today the message is unpleasant.  After figuring how to deal with some of our government’s policy decisions for the past several years, I must finally admit defeat.  It is not feasible to continue operations with the latest round of policy changes.  As recently as a few days ago, I thought it might work out.  Then I was hit with business-ending tariff charges, with more to come.  To be clear, it isn’t just these new Trump tariffs that have beaten me.  Biden-era tariff changes and policies were also difficult to survive.  The cumulative effect is too much.  

As an entrepreneur I take calculated and managed risks.  Sometimes it works out, and sometimes I seem to be shooting at my own feet.  But I can’t survive an economic nuking from my own government.  It’s not just a political disagreement, or differing opinions, theories, or expectations.  It’s a matter of undisputed facts, real dollars.  Gerlt Technologies’ “Game Over” criteria were met this week as those facts became crystal-clear.  I don’t like politics and refuse to take part in it, so I’ll just leave it at that.

Gerlt Technologies will no longer take new orders for our effects.  We do still have our popular 3U Pedal Racks available until our inventory is depleted.  New tariffs on metals will make them too expensive to restock, so get ‘em while we’ve got ‘em!  I have a handful of new modules that I’ll be completing soon.  I’ll still announce them when they are finished, just ‘cause.  We were already contemplating thinning out some of our guitars, amps, pedals, and maybe some components and other gear that have somehow quietly filled up all our available space over the past several years.  We may add some listings for those on the site or perhaps on Reverb in the coming months.  Keep an eye on us if you are interested in some lightly used gear in great condition.  I expect and plan this shutdown to be permanent, but maybe I’ll pop up and take a look around in a couple of years if enough major changes take place in government policy after the mid-term elections.   

It has been a lot of fun!  I enjoyed meeting thousands of you along the way – always the best part of any adventure.  Thank you all, and all the best to you and yours!

Bill Gerlt

President, Gerlt Technologies

26 August, 2025

 


 

 

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.