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

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 output > 1-input audio interface

Stereo output > 2-input audio interface

Mono in > stereo out (guitar amps)

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

Stereo in > stereo out

Pedal bypassing amp’s preamp with effects loop return

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.

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.

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.

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.