Modern noise gate setups: pre vs post (and why “tight” gates can ruin your feel)

A noise gate is one of those tools you don’t hear… until it’s set wrong.

Modern rigs are more complex than ever: multiple gain stages on a pedalboard, high‑gain amps with FX loops, direct rigs with IRs, plugins, modelers with multiple internal gates. A well‑placed gate makes your setup quiet and professional. An overly aggressive one makes you fight your instrument: choked sustain, unnatural mutes, dynamics that vanish.

This guide covers:

• the real‑world difference between pre and post gating;
• why dual‑stage gating (or a sidechain/loop gate) is often the best move;
• how to set threshold/release without killing dynamics;
• 5 quick tests to check if you’re choking your feel.

Useful Muviber searches to browse options:

• noise gates and suppressors
• high‑gain distortion pedals
• pedalboard power supplies

1. Gate vs suppressor vs expander (quick clarity)

• Noise gate: closes when the signal drops below a threshold. It can be brutally effective.
• Noise suppressor: often marketing; usually a gate tuned for more “musical” behavior.
• Downward expander: turns down low‑level noise without slamming shut. Often the best choice when touch matters.

If you need dead‑silent stops in a high‑gain context, a proper gate is fine. If you need feel and dynamics, a softer gate or an expander often wins.

2. Pre gate: what it actually cleans (and when it makes sense)

What “pre” means

A pre gate sits before the main gain source:

• before a high‑gain distortion/drive;
• before the amp input (if your main gain is the preamp);
• at the modeler/plugin input.

What it’s great at

• Prevents noise from being amplified by gain and compression.
• Helps with single‑coil hum, interference, noisy buffers/cables.
• Tightens stops and mutes because it controls the noise floor while you’re not playing.

Common limitations

• If threshold is too high, the gate reacts to your playing: lost sustain, choked notes, volume‑knob weirdness.
• It won’t fix noise generated after it (preamp hiss, loop noise, post‑gain chain issues).

3. Post gate: where to place it, what it saves, and what it can ruin

What “post” means

A post gate sits after the main gain source:

• in an amp FX loop (after the preamp);
• after a preamp pedal / “amp‑style” distortion;
• in the post section of a modeler/plugin.

What it’s great at

• Cleans up hiss created by a noisy preamp or a heavily compressed gain chain.
• Can make a noisy loop workable.

The feel trap

• If placed after delay/reverb, it can chop tails and ambience.
• If set too tight, it can remove micro‑dynamics and sustain in an unnatural way.

Practical rule

A post gate should go before delay/reverb/ambience in most real rigs.

4. The most reliable modern approach: dual‑stage gating

Many modern high‑gain setups behave best with two stages:

1. Pre gate: low threshold, prevents noise from entering the gain.
2. Post gate: gentler than you think, cleans the final hiss.

If your gate has a loop/sidechain (where the detector listens to your dry input but the gate is applied later), it’s often the cleanest solution: natural tracking, strong noise reduction.

5. Real‑world wiring examples

5.1 High‑gain amp with FX loop (classic)

Guitar → (Pre gate) → boost/OD → amp input → FX Send → (Post gate) → modulation → delay → reverb → FX Return

5.2 Pedalboard‑based high gain

Guitar → (Pre gate) → boost/OD → distortion → (Post gate optional) → mod → delay → reverb → clean amp / FRFR

5.3 Modeler / plugins / direct rig

Input gate (soft) → drives/amp → post gate (light) → cab/IR → delay/reverb

The #1 mistake here is the “preset gate”: it sounds impressive solo, then it eats sustain in a band mix.

6. Why “tight” gates ruin your feel (and how to spot it)

A too‑tight gate usually comes from:

• threshold too high;
• release too short;
• the detector reacting too much to low‑frequency content (rumble, resonances, mutes).

Real symptoms

• Notes drop off like a switch mid‑sustain.
• Palm mutes feel “sampled”: tight but artificial.
• Vibrato/bends lose tail.
• Volume‑knob cleanup becomes binary: sound vs silence.

Fast fixes (highest impact first)

1. Lower the threshold until long notes stop getting chopped.
2. Lengthen release: a bit more noise beats dead feel.
3. If available, use hysteresis or reduce depth/range (you don’t need -∞).
4. Use sidechain/filtering to reduce low‑end triggering.
5. Consider an expander when dynamics are the priority.

7. Starting settings that actually work

There are no universal numbers, but there is a reliable method.

“Noise floor + margin” method

1. Play, then stop.
2. Listen to the noise floor.
3. Raise threshold until the noise clearly drops.
4. Back off just enough so sustained notes don’t get truncated.

Practical ranges (indicative)

8. 5 quick tests to avoid choking your rig

1. Sustain test: hold a note + vibrato. If it dies in steps, release is too short or threshold too high.
2. Mute test: alternate palm mutes and open strings. If it “pumps”, lengthen release or filter sidechain.
3. Volume knob test: roll back volume to 50%. If you disappear, the gate is too aggressive.
4. Delay tail test: play with delay, then stop. If the tail is cut, the gate is after the delay or set too high.
5. Band‑mix test: play over a backing track. If you lose glue/dynamics, you’re gating more than necessary.

9. Before you blame the gate: 6 noise causes a gate can’t truly fix

A gate is a band‑aid. If the source is messy, you’ll still feel it.

Quick checklist:

• isolated, stable power (avoid daisy‑chaining on high gain);
• good patch cables and solid connectors;
• distance from transformers/lighting/noisy PSUs;
• sane gain staging (sometimes “too much gain” is just too much);
• FX loop level matching (send/return);
• pickups and shielding (single coils + bad venue wiring = classic).

Fix these and your gate can be softer — and your feel improves immediately.

FAQ

Should I use a gate or a suppressor?

Brand names vary. Choose based on controls (threshold/release), whether you have a loop/sidechain option, and how hard you need the gate to close.

Should the gate go in front or in the FX loop?

If the main noise comes from pickups/pedals before gain: front. If it comes from preamp/loop hiss: loop. For maximum silence: often both.

Why does my tone feel “smaller” with a gate on?

Usually threshold is too high and release too short — you lose sustain and micro‑dynamics, so the sound stops breathing.

Can I gate bass?

Yes, but be careful with low end: use longer release and, if possible, filter the detector to avoid pumping.