How Do I Connect Single Cable EFX Loops to an Amplifier?

by Jim Strom, Demand Media

Connect the EFX loop to an input on the back of your amp.

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An EFX ("Effects") loop is an electronic audio component for adjusting the sound of musical instruments, primarily the electric guitar. EFX loops are available to produce a variety of sound effects through a connected amplifier. The cable connection is simple but must be made in a certain sequence so the amplifier can be used for distortion or overdrive effects without interfering with the sound from the EFX loop. Always protect you equipment by unplugging the amp's power cord before hooking up audio cables.

Step 1

Press the amplifier's toggle switch to the "Off" position before unplugging the power cord. This prevents a potentially damaging power surge when connecting other audio components.

Step 2

Push the plug on one end of the audio cable into the output jack on the side edge of the EFX loop.

Step 3

Connect the plug on the other end of the cable to the jack on the back of your amp labeled "Effects Send" or similar. With this connection, the signal from the EXF loop will not be canceled out when you use the amplifier's overdrive feature to produce a heavy, distorted sound.

Step 4

Connect an electric guitar or other instrument to the input jack on the front of the amplifier, typically on the far left next to the sound adjustment knobs.

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References

  • Olly's Guitar: What is an Effects Loop
  • Radial Engineering: Bigshot EXF True Bypass Switcher

About the Author

Jim Strom began his career in 1985. He has written about electronics, appliance repair and outdoor topics for a variety of publications and websites. Strom holds a bachelor's degree in political science.

Photo Credits

  • Hemera Technologies/PhotoObjects.net/Getty Images