Guitar pedals sit between your guitar and amplifier and change your sound by adding effects like distortion, delay, or reverb

A guitar pedal is a small electronic device that processes your guitar's signal. You plug your guitar cable into the pedal's input, then run another cable from the pedal's output into your amplifier. When you step on the pedal's footswitch, the effect turns on or off. Most pedals run on batteries or a power adapter, and many let you adjust how strong the effect is using knobs or switches on top.

The basic setup works the same whether you own one pedal or ten. The order matters — effects sound different depending on what comes before and after them — but you can start with just one pedal and add more later. Understanding how to connect them and control them during playing is the foundation for using pedals effectively.

Key Takeaways

  • Guitar cables connect your guitar to the pedal's input, then the pedal's output to your amplifier, and the signal flows in one direction only.
  • Most pedals have a footswitch you press to turn the effect on and off, and knobs on top to control how much effect is applied.
  • When you use multiple pedals together, the order you arrange them in changes how the effects sound, and distortion pedals usually go before delay or reverb.
  • Pedals need power from either batteries, a single power adapter, or a power supply that runs multiple pedals at once.
  • Your amplifier's volume and the pedal's settings work together, so you may need to adjust both to get the sound you want.

Connecting a single pedal to your guitar and amp

Take a standard guitar cable and plug one end into your guitar's output jack (the jack on the body where you normally plug in). Plug the other end into the pedal's input jack — this is usually marked "In" or has an arrow pointing toward the pedal. Now take a second cable and plug it into the pedal's output jack (marked "Out" or with an arrow pointing away). Plug the other end of that cable into your amplifier's input jack.

The signal travels in one direction: guitar → pedal input → pedal → pedal output → amplifier. If you plug cables in backward, no sound will come through. Once everything is connected, turn on your amplifier and play a note. You should hear your guitar through the amp. Now step on the pedal's footswitch — the effect should turn on. Step on it again and the effect turns off. If nothing happens, check that the pedal has power (see the Power section below).

Understanding the controls on a typical pedal

Most pedals have a footswitch in the center that you press with your foot to turn the effect on and off. A light above or beside the switch (usually red or green) shows whether the effect is currently active. Around the footswitch are knobs that control different settings. A Level or Volume knob sets how loud the effect is. A Tone or Gain knob controls the character or intensity of the effect — turning it up makes distortion heavier or delay more pronounced.

Other knobs depend on the type of pedal. A delay pedal might have a Time knob that sets how long the delay repeats, and a Feedback knob that controls how many times it repeats. A reverb pedal might have a Decay knob that sets how long the reverb tail lasts. Start with the knobs at their middle position and adjust them while playing to hear how each one changes the sound. Most pedals also have a small switch or button on the back or side that lets you choose between different modes or settings.

Powering your pedal

Check the bottom or back of your pedal for a power input. Many small pedals run on a 9-volt battery — you open a compartment on the bottom, insert the battery, and close it back up. The battery will last anywhere from a few weeks to several months depending on how often you use the pedal. When the effect starts to sound weak or the light dims, the battery is dying and needs replacement.

If your pedal has a power jack (a small round or rectangular connector), you can plug in an external power adapter instead of using a battery. Most pedals use a 9-volt adapter with a center-negative connector — this is the standard, but always check your pedal's manual to be sure. If you plan to use multiple pedals, a power supply is more practical than individual adapters. A power supply is a single unit with multiple output jacks that powers all your pedals from one device. Daisy-chain cables let you connect multiple pedals to one power supply output, though some pedals (especially digital ones) need their own dedicated output to avoid noise.

Using multiple pedals in the right order

When you add a second pedal, you insert it between the first pedal's output and your amplifier. The signal now flows: guitar → first pedal → second pedal → amplifier. The order matters because effects interact. A common setup is to put distortion or overdrive pedals first, then modulation effects (chorus, flanger, phaser) in the middle, and time-based effects (delay, reverb) last. This order usually sounds natural because distortion affects the original guitar tone, modulation effects then shape that distorted tone, and delay and reverb add space around the final result.

You can experiment with different orders to find what sounds good to you. Some players put reverb before distortion for a washed-out, ambient sound. Others put delay before distortion to create repeating distorted notes. The "rules" are guidelines, not laws. Start with the standard order, play through your pedals, and then swap two adjacent pedals and listen to the difference. You will quickly hear how order changes the overall sound.

Controlling pedals while you play

During a performance or practice session, you turn effects on and off by stepping on the footswitch with your foot. Most footswitches are designed to be pressed while you are playing, so you do not have to stop or look down. A quick tap turns the effect on or off. Some pedals have multiple footswitches — one to turn the effect on and off, and others to switch between different modes or settings without stopping the effect.

If you have several pedals, you might step on different switches at different times during a song — for example, turning on distortion for the chorus and turning it off for the verse. This takes practice to do smoothly without missing notes or losing rhythm. Many players use a pedalboard — a wooden or metal platform that holds multiple pedals in a fixed arrangement — so all the switches are in the same place and straightforward to reach. A pedalboard also keeps cables organized and makes it straightforward to move your entire setup from one place to another.

Adjusting your amplifier to work with pedals

Your amplifier's volume and tone settings interact with your pedal's settings. If your amplifier is set very loud, even a quiet pedal effect will sound loud. If your amplifier's gain (the input level) is turned up high, a distortion pedal will sound heavier than it would through a clean amplifier. Start with your amplifier at a moderate volume and gain setting, then adjust your pedal's level knob to match. If the effect is too quiet, turn up the pedal's level knob rather than turning up the amplifier.

Some amplifiers have a clean channel and a drive channel. The clean channel is best for most pedal effects because it does not add its own distortion. If you use a distortion pedal through a drive channel, the two distortions stack and can sound muddy. Experiment with your amplifier's settings to find what works with your pedals. Many players keep their amplifier's settings fairly neutral and use the pedals to shape the tone, rather than relying on the amplifier alone.

Frequently Asked Questions

Do I need a special cable to connect pedals?

No, standard guitar cables work fine. They are the same cables you use to plug your guitar into an amplifier. Make sure the cables are long enough to reach from your guitar to the first pedal, between pedals, and from the last pedal to your amplifier. Shorter cables reduce noise and clutter, but if they are too short, you will not be able to move around while playing.

Can I use a pedal with a battery and a power adapter at the same time?

Most pedals automatically switch to the power adapter when you plug one in, and the battery stops being used. This is convenient because you do not have to remove the battery. However, if you are not sure how your specific pedal works, check the manual. Some older pedals require you to remove the battery before using an external adapter.

What happens if I connect pedals in the wrong order?

The pedals will still work, but the sound will be different. For example, if you put reverb before distortion, the reverb effect gets distorted along with your guitar tone, which usually sounds strange. Experiment with different orders to find what you like, but if something sounds bad, try moving a pedal earlier or later in the chain.

Can I use a pedal designed for electric guitar on an acoustic guitar?

Yes, most pedals work with any guitar as long as you have an amplifier to plug into. Acoustic guitars are quieter than electric guitars, so you may need to turn up your amplifier or the pedal's level knob more. Some effects like distortion sound different on acoustic than on electric because of the different tone, but they will still work.

Why does my pedal make a humming or buzzing noise?

Noise usually comes from a weak battery, a loose cable connection, or electrical interference from nearby devices. Try replacing the battery first. If that does not help, unplug and replug all your cables to make sure they are seated firmly. If you are using a power adapter, move it away from your amplifier or other electronics, as they can cause interference.