If you play high-gain guitar, you already know the battle. Crank up the distortion and suddenly there is a wall of hiss between every chord. But the moment you add a noise gate, your sustained notes vanish. Your playing feels stiff and choppy.
I spent months wrestling with this exact problem on a 5150-style rig. The fix was not a different pedal. It was learning where to place a noise gate in my signal chain. One wrong placement and the gate either lets hiss through or chokes your sustain.
The trick is that hiss and sustain do not live in the same part of your signal. Hiss comes from the output of high-gain pedals and preamps. Sustain is your guitar’s actual note fading out. If you place the gate in the right position, it can cut the first and keep the second.
We will break down three placement methods: in-line (after dirt), effects loop (after preamp), and the 4-cable method. Each works for different rigs. I will also share the exact threshold settings I use to clean up high-gain setups without strangling a single note.
Table of Contents
What a Noise Gate Does and Why Placement Matters?
A noise gate is an effects device that automatically silences your guitar signal when it falls below a set volume threshold. When you are not playing, the gate closes and kills background hiss. When you strike a note, the gate opens and lets your tone pass through.
Simple in theory. But here is the catch: a gate cannot tell the difference between hiss and the tail end of a sustained note. If your guitar’s signal drops below the threshold while the note is still ringing, the gate slams shut. The note dies. That is the exact problem we are solving.
Placement is the single most important variable because it determines what signal the gate sees. Put the gate before your distortion and it only sees your clean guitar signal. Hiss has not been generated yet. Put it after distortion and it sees the hiss, but it also sees the tail of your sustained note. The gate now has to split the difference.
The fix is not to avoid post-distortion placement. It is to understand which part of the signal you are trying to gate and choose the spot that targets noise without touching the note decay. That is why the three methods below all exist.
Think of it this way: you want the gate as close to the noise source as possible, but you want it to open based on your guitar’s clean output. The 4-cable method makes that possible. The in-line and effects loop methods are compromises that work fine for simpler rigs.
The Three Placement Methods: In-Line, Effects Loop, and 4-Cable
You have three options for noise gate placement. Each targets noise from a different part of your chain:
In-line means the gate sits on your pedalboard after your dirt pedals. Your signal runs guitar to pedals, then through the gate, then into the front of your amp. This handles pedal-generated hiss but does nothing for preamp hiss.
Effects loop placement means the gate goes between your amp’s preamp and power amp via the FX loop send and return jacks. This handles preamp hiss but misses any noise generated by your pedals.
The 4-cable method uses four cables to split the gate’s job. The gate senses your clean guitar signal but applies reduction after the preamp. This is the best option for high-gain amps because it catches all noise sources while tracking your actual notes.
If you only use a pedalboard with no amp distortion, the in-line method is enough. If you use your amp’s distortion channel heavily, you need the effects loop or the 4-cable method. If you run both pedals and a high-gain amp, the 4-cable method is your answer.
I will walk through each setup in detail below, including where every cable goes and where you set the threshold for each.
In-Line Placement: After Your Dirt Pedals
In-line placement is the simplest method and the one most guitarists try first. Your guitar plugs into your pedals as normal. The noise gate goes last in the pedal chain, right before the cable hits your amp’s front input.
Here is the signal flow: Guitar to Tuner to Overdrive to Distortion to Noise Gate to Amp Input. The gate sees everything your pedals produce, including their hiss. When you stop playing, it closes and silences the entire chain.
This method works great if you play through a clean amp and get all your dirt from pedals. It also works well if you only need to tame noise from a fuzz or distortion pedal. I used this setup for years with a Fender-style clean amp and a Pro Co Rat.
Set the threshold low, around -40dB. Roll it up until the hiss stops when you are not touching the strings. If your notes start choking off, back the threshold down until sustain returns.
Here is the tradeoff: in-line placement does not handle amp hiss. If you switch to a high-gain amp channel, the preamp generates its own hiss after the gate. You will hear noise even with the gate engaged. For that, you need the effects loop or 4-cable method.
One more thing about in-line placement. Do not put the gate before your dirt pedals. If the gate sits before distortion, the dirt pedal amplifies whatever signal gets through, including noise. The gate becomes useless. Always place it after the noise source.
Effects Loop Placement: After the Preamp
Most high-gain amps have an effects loop with two jacks: Send and Return. These taps sit between the preamp (where your distortion is created) and the power amp (where the signal gets loud enough for speakers). The effects loop is where hiss from your preamp is loudest.
For effects loop placement, plug a cable from your amp’s Send jack into the input of your noise gate. Then plug another cable from the gate’s output into the amp’s Return jack. Your pedalboard runs straight into the amp’s front input as normal.
Now the gate sits after the preamp. It sees the hiss your high-gain channel generates and silences it when you are not playing. This solves the biggest weakness of in-line placement for players who rely on amp distortion.
The catch is that the gate is now reacting to an already-distorted signal. It does not see your clean guitar output, so it cannot distinguish between a soft sustained note and background hiss as easily. This is where sustain gets chopped if you are not careful with settings.
For effects loop placement, set the threshold slightly lower than in-line, around -45dB. Use a slower release time if your gate has that control. A slow release lets the note fade naturally before the gate closes. If the release is too fast, the gate snaps shut mid-decay and your note sounds like it got cut with a knife.
If your gate has a decay knob, set it to the longest setting that still controls hiss. The decay controls how fast the gate closes once the signal drops below threshold. Longer decay means the gate eases shut, preserving the natural tail of your notes.
The 4-Cable Method: Best of Both Worlds
The 4-cable method is the gold standard for noise gate placement with high-gain amps. It solves the tracking problem by sending your clean guitar signal to the gate’s detector while applying the actual reduction after the preamp. This means the gate knows exactly when you are playing and when you stop.
You need a noise gate with a dedicated send and return loop. The BOSS NS-2, NS-1X, and similar suppressors have these connections built in. A basic gate without a send/return loop cannot do the 4-cable method.
Here is how to set it up with four cables:
Cable 1: Guitar to amp input. This lets your clean signal hit the preamp so the amp’s own tone is unaffected.
Cable 2: Amp effects loop Send to noise gate Input. The preamp’s output (including its hiss) now enters the gate for processing.
Cable 3: Noise gate Output to amp effects loop Return. The cleaned-up signal returns to the power amp.
Cable 4: Guitar to noise gate Return (or key input, depending on the pedal). This sends your clean guitar signal to the gate’s detector circuit so it tracks your playing, not the preamp noise.
Wait, that might sound contradictory. Let me clarify the routing. The standard 4-cable method for pedals like the NS-2 works like this: guitar goes into the gate’s input first, then the gate’s output feeds the amp input. The amp’s effects loop send goes into the gate’s return loop, and the gate’s send goes back to the amp’s effects loop return. The gate uses your clean guitar signal to decide when to open and close, but it applies the actual attenuation in the effects loop.
That last point is the whole reason this method preserves sustain. The gate is making its open-or-close decision based on your clean guitar signal. It knows the difference between a real note fading out and preamp hiss because your guitar’s output is what triggers it. The actual volume reduction happens later, after the preamp, where the hiss lives.
Set the threshold on the 4-cable method between -35dB and -45dB. Because the gate is tracking clean signal, you can set the threshold a bit higher without killing sustain. The clean signal is predictable and gives the gate a clear reference point.
If you have dirt pedals on your board too, put them between the gate’s input and the amp input. That way the gate still tracks your clean guitar, and the dirt pedals feed into the front of the amp as normal.
How to Set Threshold Without Killing Sustain?
The threshold is the volume level at which your noise gate opens or closes. Set it too high and the gate stays closed during quiet passages and sustain tails. Set it too low and hiss bleeds through. Finding the sweet spot is the difference between a clean rig and a choppy mess.
Here is the step-by-step I use to dial in any gate:
Step 1: Plug in and set your rig to the loudest, highest-gain tone you play. Do not set the gate at low volume because the hiss floor changes when you crank the amp.
Step 2: Turn the threshold all the way down. Let the hiss run free for a moment so you can hear what you are fighting.
Step 3: Slowly raise the threshold while you are not playing. Stop the moment the hiss goes silent. That is your minimum effective threshold.
Step 4: Play a sustained note and let it ring out. If the note cuts off before it naturally fades, your threshold is too high. Back it off a few dB until the sustain returns.
For most rigs, the sweet spot lands between -35dB and -50dB. High-gain metal setups tend toward the -40dB range. Cleaner rigs with single coil pickups can often get away with -50dB because the noise floor is lower.
Attack and release settings matter just as much as threshold. Attack controls how fast the gate opens when you hit a note. Set it too fast and you get an audible click at the start of each note. Set it too slow and your pick attack feels sluggish. I aim for a fast attack of 1 to 5 milliseconds.
Release (sometimes called decay) controls how fast the gate closes after the signal drops. This is where most sustain problems live. A release that is too fast snaps the gate shut mid-note. Start at 100 milliseconds or longer and only speed it up if you notice a gap between notes where hiss leaks through.
Single coil players face a tougher challenge. Single coils generate more 60-cycle hum and broadband hiss than humbuckers. You may need a slightly higher threshold or a dedicated noise reduction pedal designed for single coils. Some players run two gates, one mild and one aggressive, to handle the extra noise without crushing the signal.
If you are recording, consider a downward expander instead of a hard gate. An expander gradually reduces signal below the threshold instead of cutting it off entirely. This sounds more natural and is far less likely to chop sustain tails. Many DAW noise reduction plugins offer expander modes that work well on recorded guitar tracks.
Common Mistakes That Cut Your Sustain
Here are the five most common mistakes I see guitarists make with noise gates, along with the fix for each:
1. Threshold set too high. This is the number one cause of killed sustain. The gate is closing before your note finishes decaying. Fix: lower the threshold in 2dB increments until sustain returns.
2. Release time set too fast. The gate snaps shut the instant your signal dips below threshold. Fix: lengthen the release to 100ms or more so the gate eases closed.
3. Gate placed before distortion. The distortion pedal amplifies whatever noise slips through the gate, making the gate useless and adding its own hiss on top. Fix: move the gate after all dirt pedals.
4. Gate in front of reverb and delay. If the gate closes before your delay tails or reverb wash finish ringing, the tails get chopped off. Fix: place time-based effects after the gate in the chain, or use parallel routing for ambience.
5. Using one gate for everything. A single gate set aggressively enough to kill preamp hiss will also kill your sustain. Fix: use the 4-cable method so the gate can track clean signal, or run two gates at gentler settings.
If your gate still sounds bad after fixing all five of these, the problem might be upstream. A bad power supply, ground loop, or unshielded guitar cavity can generate noise that no gate placement will fully solve. Check your power isolation and guitar shielding before blaming the gate.
Frequently Asked Questions
Where should a noise gate be placed?
Place a noise gate after your noisiest signal source. For pedalboard rigs, put it last after all dirt pedals. For high-gain amps, use the effects loop or the 4-cable method so the gate sits after the preamp where hiss is loudest.
What are common noise gate mistakes?
The most common mistakes are setting the threshold too high, using a release time that is too fast, placing the gate before distortion, putting it in front of reverb and delay, and relying on a single aggressive gate instead of the 4-cable method.
Where should a noise gate go in my chain?
A noise gate should go after your distortion pedals in a simple chain. If you use amp distortion, place it in the effects loop or use the 4-cable method. Never place it before dirt pedals or before time-based effects like reverb and delay.
Does the tube screamer go before or after the noise gate?
The Tube Screamer goes before the noise gate. Overdrive and distortion pedals should always come first so the gate can silence the hiss they generate. The noise gate sits last in your dirt pedal chain, right before the amp input or effects loop.
Conclusion
Getting noise gate placement right comes down to one principle: the gate needs to sit after the noise source but track your actual playing. The in-line method handles pedal hiss, the effects loop handles preamp hiss, and the 4-cable method handles both at once.
Start with your threshold around -40dB, use a release time of 100 milliseconds or longer, and never put a gate before your dirt pedals or after your reverb. If you are still learning where to place a noise gate for your specific rig, try the 4-cable method first. It is the most forgiving setup and the one most likely to kill hiss without cutting sustain.
The best gate is the one you forget is there. Dial it in until the hiss disappears and your notes ring out naturally. That is the sign of correct placement.