Hello Effects Fans!

Today there is good news and bad news.  I always like to end on a good note, so let’s get the bad news out of the way first.

The bad news is that Gerlt Technologies is going to stop accepting orders, effective immediately.  There are multiple reasons we need to stop, mostly related to the COVID shutdowns and their ripple effect through the economy.  While there’s never a good time for a pandemic, it caught us at a particularly awkward time early in 2020 - no complaints, just a fact.  I thought we could continue as planned, but it just isn’t working out in spite of our hard work and best intentions.  We reached a point where we risk doing ourselves more harm than good.  It’s time for a break.

The good news is that we are stopping now so that we can return later.  This will be a temporary halt until the COVID situation is resolved and the economy improves.  Then we expect to be right back in the thick of it, building the widest variety of the best rack effects available anywhere!  We have no debt, no landlord demanding payment, or any of the usual financial pressures many small businesses are experiencing right now.  We have a good stock of great parts waiting to be turned into great effects so you can make great music.  We’re in good shape that way, which makes a “pause” and “resume” possible.  I can’t predict the duration of the pause at this point.  I expect it will take some time before COVID impacts will be behind us and a full-strength economy ahead of us.  Other small businesses, including some of our partners, have used this approach to protect their businesses from permanent shutdowns.

We have quite a bit of work in progress.  Over the next weeks you will continue to see additional product announcements and updates, as we finish those ongoing activities.  Keep an eye on our Facebook page and website for continued updates.  Customer Support will still be available, but there may be some delays.  Your messages will not be ignored and we will respond as quickly as we are able.

We know that many of you have also been impacted by COVID and our thoughts are with you.  We wish all of you, your friends, and your families the best during these trying times and look forward to the opportunity of serving you in the future.


Bill Gerlt

President, Gerlt Technologies

31 January, 2021




Gerlt Technologies makes hundreds of customizable rack effects, at prices comparable to regular 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!

Yikes!  We’ve been so busy working on new modules that we let some of our new product announcements slip.  It’s time to correct that oversight. 

Today we announce the Gerlt Technologies Chainsaw module.  It is an extreme high-gain distortion for the most brutal and heavy metal you can legally play in most countries.  If you like your metal Swedish style, then our HM-2 configuration may be what you want.  It compares to the original Made In Japan Boss HM-2 Heavy Metal pedal, a classic ingredient to that heavy Swedish death metal sound.  Add a humbucker guitar, a solid state amp, set all the knobs to 10, and you’re on your way.  Or if you prefer some American heavy metal, choose the FX56 configuration, which compares to the Made in the USA DOD FM-56 American Metal pedal.  The circuits are nearly the same.

The Boss HM-2 was produced from 1983 to 1991, first in Japan and later in Taiwan.  The two versions of the circuit are nearly identical, with some minor part changes.  The earlier MIJ models seem to be most popular, although it is difficult to tell the difference in sound between the ones made in Japan and Taiwan.  The HM-2 wasn't really all that popular, but you may remember that the heavy metal bands were just beginning to emerge around that time.  Somehow it caught on in Sweden, and suddenly the price of the older units jumped as players began buying them up for the heaviest of heavy metal tones.  It is often used with all controls set at max to get maximum distortion tones.

In 1984 US pedal company DOD released the FX56.  The FX56 circuit is basically the same as the HM-2, but some different part values were used and the Low and High controls were combined into a single Presence control, although it continued to use the unique tone stack design of the HM-2, but with slightly tweaked frequency ranges.  The FX56 goes from overdrive to distortion, although perhaps the level of distortion is a bit lower.  The Presence control goes from a subdued, compressed tone to bright and cutting.  With the controls turned up, you'll likely get out-of-control feedback and squealing.

Make no mistake, both configs are designed primarily for very high distortion metal tones.  But if you dial it down a bit, you may find your Iron Maiden, Judas Priest, and other British metal tones in there, too.  With all that gain, you’ll have loads of feedback and it may get into a squealing, out of control mess depending on your guitar, amp, and other gear.  If that happens, you know you have all the gain your rig can handle and you’ll likely need to take a little gain off somewhere to get it under control.  Of course that much gain means there is also an excellent opportunity for noise.  Gain will multiply noise just as easily as your guitar tone, as high-gain players well know.  You’ll probably want humbuckers and some sort of active noise management somewhere in your chain.

The interesting part of this circuit is the tone stack.  It is designed to help maintain some clarity with all that gain.  This is also where the two configurations differ most.  The HM-2 config has Lo and High “Color Mix” controls.  The Lo controls the low end like normal.  But the frequencies controlled by the Hi band adjust as you adjust the level of highs.  The FX56 config is similar, but the Lo and Hi controls are combined into a single Presence control.

We offer some customizations for both circuits, but if you’re looking at this module then you are probably after that heavy tone and you won’t need any options to get it.

You can see the details about our Chainsaw at: Chainsaw.  Or look for it in the Distortion Modules section under Products -> Modules -> Modules By Type.