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Connecting Your UAFX Pedals

Learn how to wire your UAFX pedals. All UAFX pedals use the same connections.

In this article

Connecting UAFX Pedals Overview

All UAFX audio jacks accept 1/4" (6.35 mm) unbalanced TS (Tip-Sleeve) instrument cables. Although TRS (Tip-Ring-Sleeve) cables may be used, they offer no benefit over TS cables.

Stereo UAFX pedals sense which jacks are connected and adjust the internal signal routing automatically. Stereo inputs are processed in true stereo, and output as either stereo or mono depending on the connected outputs.

UAFX pedals are designed with enough headroom to easily accommodate instrument levels and amp effects loop levels, but they can also handle line-level gear such as synthesizers and audio interfaces. The pedals are voiced for instrument levels, so you may need to reduce the line out level of the gear you’re connecting into the pedals to avoid overdriving the effects.

The USB-C port is for pedal registration and firmware updates only, via the UAFX Control desktop app for Mac and Windows computers. You can connect to any type of USB port on the computer, but you may need an adapter.

The PAIR button and LED (full-sized pedals only) are for pedal registration and global pedal settings (bypass, footswitch modes, and other settings) only, via the UAFX Control mobile app.

 

 

 


 

Connection Examples for Full-Sized UAFX Guitar Effect Pedals

Important: You must connect to UAFX’s IN 1/MONO jack. The IN 2/STEREO jack doesn’t work by itself without the IN 1/MONO connection. 

Mono in > mono Out

 

Mono in > stereo out

 

Stereo in > stereo out

 

Pedal in amp’s effects loop

 

Pedal in dual amp stereo setup showing effects loop connections for both amps

 


 

Connection Examples for Compact UAFX Guitar Effect Pedals

mono-pedal-amp-guitar-connect.png

Compact pedal Mono in > Mono Out

mono-pedal-effects-loop.png

Compact pedal in amp’s effects loop

 


 

Connection Examples for UAFX Amp Emulators

Tip: When playing through a real guitar amplifier and speaker cabinet, you might want to bypass the speaker cabinet emulation by pressing the pedal's Speaker switch until its LED is unlit.

Mono in > mono out

mono-audio-interface.png

Mono output > 1-input audio interface

stereo-audio-interface.png

Stereo output > 2-input audio interface

Mono in > stereo out (guitar amps)

mono-stereo-full-range-connect.png

Mono in > stereo out (full range powered speakers or PA)

Stereo in > stereo out

effects-loop-bypass-amp-preamp.png

Pedal bypassing amp’s preamp with effects loop return

two-amps-fx-loops-bypass-preamp.png

Pedal in dual amp setup bypassing amps’ preamps with effects loop returns

 


 

4-Cable Mode

4-cable mode with Dream '65, Ruby '63, and Woodrow '55 amp pedals let you add another switchable channel to any real guitar amplifier that has an effects loop. This special mode lets you switch between your guitar amplifier’s built-in preamp section and the sounds in your pedal.

Warning: Turn off your amplifier before wiring the pedal and enabling 4-cable mode. If you enable 4-cable mode with incorrect wiring, you can cause extreme feedback.

How 4-cable mode works

  • When a UAFX amp pedal is on, the amp emulation is heard, and the real amp’s preamp section is bypassed.
  • When a UAFX amp pedal is off, the real amp’s preamp section is heard, and the pedal is bypassed with analog dry-through.

4-cable mode notes

  • 4-cable mode is only available on UAFX amp pedals (Dream '65, Ruby '63, and Woodrow '55).
  • If the pedal is not already in Live | Preset mode when you enable 4-cable mode, a confirmation appears, and the pedal automatically switches switches to Live | Preset mode after you confirm.
  • When you’re playing through a real guitar amplifier and speaker cabinet, you might want to disable the pedal’s speaker cabinet emulation by pressing the pedal's Speaker switch until its LED is unlit.
  • You may need to adjust the UAFX pedal’s Output knob lower than you normally would, because the effects loop return on your amp is unattenuated.
  • If you are using other pedals in your effects loop, place them between the first UAFX amp pedal’s 2/Stereo output and the Return input on your amp’s effects loop. With this wiring, the other pedals in the effects loop still process audio, even when the pedals are bypassed.
  • Front-of-amplifier effects, such as distortion and overdrive pedals, should be placed between the instrument and the first pedal’s 1/Mono input.

Multiple UAFX amp pedals

To use multiple UAFX amp pedals in 4-cable mode, see the examples below. With multiple pedals configured in 4-cable mode, you can switch between preset and live sounds on the amp pedals and the sounds in your real amplifier for even more available sounds. When you use multiple amp pedals in 4-cable mode, the earliest amp pedal enabled in the chain is the amp pedal you hear.

Tip: To switch between sounds on different UAFX amp pedals with multiple pedals in 4-cable mode, enable sounds on multiple pedals. The first pedal that is enabled is the pedal you hear. When you bypass a pedal that is earlier than another enabled pedal, you will hear the next enabled pedal. In this way you can switch between sounds on multiple pedals.

To enable 4-cable mode

  1. Power off your real amplifier.
  2. Configure the cables as illustrated and described below.
  3. Connect to the pedal with the UAFX Control mobile app, and open the pedal Settings screen.
  4. In the UAFX Control mobile app, under 4-Cable Mode, tap On. A confirmation is displayed.
  5. Tap Enable 4-Cable Mode in UAFX Control mobile. The pedal enters 4-cable mode.
  6. Turn your amplifier on.

You can now hear the UAFX amp pedal when Live mode or Preset mode is enabled, and your real amplifier’s preamp channel when the pedal is disabled.

4-cable mode connections

See the diagrams and sections below for 4-cable mode connections with one, two, or three UAFX amp pedals.

One UAFX amp pedal

Use 4-cable mode with one UAFX amp pedal to add another switchable channel to your real effects-loop equipped guitar amplifier.

  1. Connect your instrument to the 1/Mono input on your UAFX amp pedal.
  2. Connect the 1/Mono output from the UAFX amp pedal to the main input on your amplifier.
  3. Connect the effects loop Send output on your amplifier to the 2/Stereo input on your UAFX amp pedal.
  4. Connect the 2/Stereo output from the pedal to the effects loop Return input on your amplifier.
  5. Place any front-of-amplifier effects between your instrument and the UAFX amp pedal, and place any other effects loop effects between the pedal’s 2/Stereo output and the effects loop return input on your amplifier.

UAFX amp pedal enabled

This diagram shows the signal flow when the UAFX amp pedal is enabled. Your signal is colored with the full amp tone from the pedal and routed to your real amplifier’s effects loop return, bypassing your real amplifier’s input jack and preamplifier section. Any effects placed in your amplifier’s effects loop return are heard.

4-Cable-Active-Diagram.png

UAFX amp pedal bypassed

This diagram shows the signal flow when the UAFX amp pedal is bypassed. Note that your signal passes through the pedal with no pedal amp tone, and into the main input on your real amplifier. Any effects placed before your amplifier’s effects loop return are heard.

4-Cable-Bypass-Diagram.png

Two UAFX amp pedals

To connect two UAFX amp pedals in 4-cable mode, you need a total of six cables. Wire the pedals as described and shown in the diagram below. In this mode, the earliest enabled UAFX amp pedal is the one you hear, even when the other UAFX amp pedal is enabled. Looking at your pedals from the top, this would be the UAFX amp pedal furthest to the right. Any effects placed before your amplifier’s effects loop return are heard.

  1. Connect your instrument to the 1/Mono input on your first UAFX amp pedal.
  2. Connect the 1/Mono output from the first pedal to the 1/Mono input on the second pedal.
  3. Connect the 2/Stereo output from the first pedal to the effects loop Return input on your amplifier.
  4. Connect the 1/Mono output from the second pedal to the main input on your amplifier.
  5. Connect the 2/Stereo output from the second pedal to the 2/Stereo input on the first pedal.
  6. Connect the effects loop Send output on your amplifier to the 2/Stereo input on the second pedal.
  7. Place any front-of-amplifier effects between your instrument and the first UAFX amp pedal, and place any other effects loop effects between the first pedal’s 2/Stereo output and the effects loop return input on your amplifier.

6-Cable-Diagram.png

Three UAFX amp pedals

To connect three UAFX amp pedals in 4-cable mode, you need a total of eight cables. Wire the pedals as described and shown in the diagram below. In this mode, the earliest enabled pedal is the one you hear, even when one or both of the other two pedals are enabled. Looking at your pedals from the top, this would be the pedal furthest to the right. Any effects placed before your amplifier’s effects loop return are heard.

  1. Connect your instrument to the 1/Mono input on your first UAFX amp pedal.
  2. Connect the 1/Mono output from the first pedal to the 1/Mono input on the second pedal.
  3. Connect the 1/Mono output from the second pedal to the 1/Mono input on the third pedal.
  4. Connect the 2/Stereo output from the first pedal to the effects loop Return input on your amplifier.
  5. Connect the 2/Stereo output from the second pedal to the 2/Stereo input on the first pedal.
  6. Connect the 2/Stereo output from the third pedal to the 2/Stereo input on the second pedal.
  7. Connect the 1/Mono output from the third pedal to the main input on your amplifier.
  8. Connect the effects loop Send output on your amplifier to the 2/Stereo input on the third pedal.
  9. Place any front-of-amplifier effects between your instrument and the first UAFX amp pedal, and place any other effects loop effects between the first pedal’s 2/Stereo output and the effects loop return input on your amplifier.

8-Cable-Diagram.png

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