Hello Effects Fans!

It has been pretty quiet here since my last update, as expected, but not silent!  Earlier today we announced our new 3U Pedal Rack and our new Double Looper configurations.  These two offerings are designed to make migrations to our rack solutions easier, providing more and better ways to continue using your third party rack effects and pedals in an all-rack solution. 

Our status hasn’t really changed much.  You are probably aware that there are some serious supply chain problems in the electronics world.  Those shortages are affecting the availability of many end products from appliances to automobiles, to, yes, Gerlt Technologies rack effects.  We are simply unable to get some critical parts right now.  Projected back order dates come and go with no new parts becoming available.  For us, these are simple, but critical parts used in our circuits.  They haven’t stopped making them or anything like that.  It’s just that they aren’t able to make enough of them fast enough with staff, facilities, and transportation that continue to be impacted by COVID all over the world.  Of course, the small supplies that are made are going to The Big Guys first.  It will be a while before availability trickles down to smaller companies.  That’s just the laws of supply and demand in action.  It will eventually get sorted out, but in the meantime small manufacturers like Gerlt Technologies will just have to wait.  That’s why we stopped taking orders earlier this year.  We plan to be a survivor, not a casualty, of the COVID aftermath.  I still don’t know when we’ll be able to restart, but some of our latest backorder dates for parts will almost certainly push a restart into early next year.

The best news is that live music is back!  Every day I see more and more info about tours and local shows.  I hope that all you professional and gigging musicians are getting more bookings – we’ve missed you!  For all of us that don’t play publicly, COVID has been a nasty reminder about taking our lifestyles for granted, as has been the passing of some great musicians like Dusty Hill and Charlie Watts.  Enjoy your favorite music live (and safely) when you can!

We appreciate your patience with us during our temporary shutdown.  Once things are back to “normal enough”, we’ll be ready to do what we can to earn your business and get you into some excellent rack effects.


Bill Gerlt

President, Gerlt Technologies

Dallas, Texas

26 August, 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!

Today we announce our new MT-10 module.  Actually, we were going to announce it on Monday.  However, we didn’t have electricity and there was water pouring out of the ceiling, so we got distracted.  Luckily, plumbing and building electronics have some commonality.  In electronics you solder copper wire covered with insulation.  In plumbing you solder copper pipe covered with insulation.  Power is back on, I fixed the pipe, and the sun is out, so things are looking up.  At least until enough stuff thaws that we can figure out what repairs are necessary beyond some new ceiling...

Our MT-10 module compares to the Ibanez MT-10 Mostortion pedal.  The Ibanez MT-10 Mostortion made a brief appearance on the market beginning in 1990 and was yanked in 1992 or 1993.  That would suggest a pedal that had little appeal.  However, if you go looking for one, they are difficult to find (since not many were produced), but also very expensive.  Why so expensive if they aren't that good?  And why are used ones so often re-housed in different enclosures?

We have a theory about the MT-10.  Our theory is that it was marketed as a distortion pedal, but there were plenty of better distortion pedals at the time, so it didn't catch on.  However, it is a great boost and overdrive.  Many in the know in Nashville have been using them that way for years.  They are very popular in that group of players, sort of like the Nobels ODR-1 (see our Teledrive).  They are often rehoused because the originals weren't true bypass and had some cheap jacks and switches unlikely to stand up to the abuse of the road.  Players not only use them, but are even willing to go to the trouble to rebuild them to get that boost/overdrive tone.  Danelectro released a near-duplicate of the circuit recently as their Roebuck pedal.  The main difference between it and the original is the introduction of an optional clipping diode switch, a common option offered by boutique builders for many years.

The circuit uses a MOSFET op amp to produce distortion that sounds similar to tube distortion.  The tone stack comes between the two distortion stages, giving you some control over how the distortion sounds.  it is pretty unusual to find a 3-band tone stack on an Ibanez pedal, or most other brands for that matter.  That gives you extra control, particularly over the mids.  Scoop or boost, anyone?  And all 3 controls, Bass, Mids, and Treble, have a good range of control.  The clipping design is a bit odd.  The circuit uses a MOSFET input/CMOS output op amp to get some of that tube-like distortion FET technology offers.  But the clipping is symmetric pairs of silicon diodes.  More tube-like clipping generally results from asymmetric clipping, which would be a pair on one side and a single diode on the other.  And why not MOSFET clipping?  In addition, pairs of diodes reduce the clipping, compared to a single diode per side.  Reduce the clipping in a distortion circuit?  That may be the reason why it didn't catch on as a distortion pedal.  At low Distortion levels, the pedal is cleanish.  Cranked all the way up, it maybe gets past "heavy overdrive", but it doesn't really go into high gain, high clipping distortion.  The tone is fairly tube-like, though.  The result is that it sounds more like a driven amp with a good tone stack than a distortion pedal.  But if you called it a boost/overdrive pedal instead, you have a winner - right, Nashville?!

We offer several mods for our MT-10 module, but we'll only mention a couple of them here.  As you know, the more bass you let into a distortion stage, the better your chances of getting mud out the other side.  So those trying to use or mod the pedal as a distortion would find a Bass Cut option useful since the circuit lets in quite a bit of bass and the tone stack comes after the distortion, meaning you can’t control the bass going into the distortion.  So we offer a Bass Cut option.

The circuit uses soft clipping diodes to generate distortion.  While the stock config is pretty good for overdrive, we like having clipping options.  That provides an easy way to get another base tone option.  Crunchy red LEDs?  An asymmetric design or MOSFET transistors used as diodes for more tube-like tone?  It’s a pretty good option to experiment with, which is probably why Danelectro added it to their Roebuck.

Or maybe you want to go “all in” on the boost/overdrive and let the distortion go.  If so, we can bump up the voltage to give you more clean headroom.

The standard config is pretty good, but maybe some tweaks give it that little extra "something, something" you might be looking for.  However you configure it, we encourage you to think of it as a boost and overdrive rather than a distortion.  Probably not what you want for high-gain metal, but blues, country, and classic rock, oh yeah.  Should be good for stacking with other drives, too. 

By default, it lets a fair amount of bass through, so you bass players may want to check it out.  We also have an option to change (increase, decrease, or both) the amount of bass going through, so it can be further tailored to your liking.


You can see the details about our MT-10 module at: MT-10.  Or look for it in the Distortion Modules section under Products -> Modules -> Modules By Type.