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.




We recently added a 1979 Sola / Colorsound Supa Tonebender to our collection of testing pedals.  The Supa Tonebender circuit is unrelated to any of the regular Tonebender circuits.  It is actually a Big Muff Pi with a couple of mods.  The main mod is that the first set of clipping diodes was left out.  It’s thick and fuzzy, one of our favorite versions of the Big Muff Pi.

We wanted to compare it to a Supa Pi module we built to our standard spec for that configuration.  We didn’t add any options.

How does our module compare to the original?  Quite well, thank you!  Our normal test includes A/B testing at the extreme settings of all the controls.  In the extreme settings, we can’t tell them apart when we A/B them.  Saying that another way, the controls all have the same range of effect, from low to high (Volume, Tone, Sustain).  However, there are slight differences in the potentiometers.  If you want to match settings between the original pedal and our module, you can match them but the knobs may be on slightly different settings.  The base tone and the nature of the fuzz are as close to the same as two original pedals are likely to be.

Actually, our Supa Pi module sounds just a little bit better to us than the original, since it costs a few hundred dollars less!  The original pedal only takes battery power.  The battery clip has already been replaced, and needs to be replaced again because it is shorting out.  Our original also has scratchy pots that cut in and out and need to be replaced.  We tried cleaning them, but they are worn.  Once set, they work fine, but it’s a little tricky to adjust them.  If we replace them, the value of the pedal would probably drop considerably, even though it would sound better.  Of course, that isn’t an issue with the new pots on our module.  If, years from now, they are worn down like the ones on our original, we would simply unplug them and swap them for new ones – no problem!  The old Sola / Colorsound pedals are also large and take up quite a bit of space – not very pedal board friendly.  And it has some surface rust marring the chrome finish and the knobs are a bit beaten up. 

In the end, we paid several hundred dollars for an original 1979 Supa Tonebender.  It is bulky, rusty, and only takes battery power.  It needs a new battery clip and pots replaced.  That wouldn’t cost us much to do, but we’d would lose a considerable amount in resale value if we did it.  Or for about one third the cost we could get a brand new Supa Pi module that sounds the same.  Easy choice.