Guitar Amp Effects Loop Guide: When to Use It and Why It Matters

Many guitarists have an effects loop on their amp and never use it — or use it incorrectly. Understanding it can meaningfully improve your live and studio tone.

What Is an Effects Loop?

An effects loop is a send-and-return circuit that sits between the preamp and power amp sections of your guitar amplifier.

Signal flow without effects loop: Guitar → (Front of amp) → Preamp → Power amp → Speaker

Signal flow with effects loop: Guitar → (Front of amp) → Preamp → (Send) → EFFECTS → (Return) → Power amp → Speaker

Effects placed in the loop process your sound AFTER the preamp has done its thing.

Why Does This Matter?

Drive and distortion effects belong in front of the amp — they're meant to be part of the input signal that the preamp processes.

Time-based effects (delay, reverb) and modulation (chorus, tremolo) often sound better in the effects loop because:

1. They process the fully-formed tone rather than the raw guitar signal 2. Delay repeats echo your amp's natural tone, not a dry signal 3. There's less noise buildup from the preamp gain stage

The PGL GP-HGD-01 in the Chain

The PGL distortion pedal belongs in FRONT of the amp, not in the effects loop. Drive effects always go before the preamp.

Practical Setup

Front of amp: Tuner → Compressor → Overdrive/Distortion (PGL GP-HGD-01) → Wah Effects loop: Modulation (Chorus, Tremolo) → Delay → Reverb

Not Every Amp Has One

Many small practice amps and some medium amps don't include an effects loop. For these, all pedals go front-of-amp and the order-of-signal advice still applies.

Questions About Your Setup?

Our Pro Concierge can help you figure out exactly where each pedal belongs in your specific rig.