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New technology from manufacturers brings the need for good connectivity of devices. With great tone for guitar players at an all-time high from new products, it has never been more important.
But having them all connected correctly has also become more complicated. This is where the 4 cable method can help!
The 4 cable method provides guitarists with better connectivity for effects. This includes both the effects loop and the front of an amplifier. This is important when using high gain and distortion to get the best performance.
I have some great diagrams further in this Killer Rig guide. If you want to learn more about the 4 cable method, keep reading.
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What Is The 4 Cable Method?
The 4 Cable Method is a specific way to connect your guitar, effects pedals, and amplifier to achieve greater tonal flexibility and sound quality.
In a nutshell, this method allows you to use your amplifier’s preamp and power amp separately. This gives you the ability to place certain effects before the preamp and others in the amplifier’s FX loop.
Here’s a quick rundown of the components you’ll need:
- Your guitar
- An amplifier with an effects loop (Send and Return ports)
- Effects pedals (both preamp and time-based like reverb and delay)
- Four cables: two standard instrument cables and two patch cables
The idea is to route your guitar signal through your effects in a way that maximizes the tonal capabilities of both your pedals and your amplifier.
Unlike traditional setups where all effects are either before the amplifier or in the effects loop, the 4 Cable Method allows for a more nuanced distribution.
For instance, you can have your overdrive and distortion pedals before the amplifier’s preamp to shape the basic tone, while placing modulation and time-based effects like chorus, delay, and reverb in the amp’s FX loop.
This avoids muddying up the sound and allows each effect to operate at its optimal point in the signal chain.
Here is a video tutorial on how the 4 cable method works:
Why Use the 4 Cable Method?
The 4 Cable Method offers several advantages for guitarists who are serious about their sound quality and setup flexibility. Here are the key reasons to consider using this method:
Advantages Over Traditional Setups
- Tonal Flexibility: The method allows for precise placement of effects in the signal chain, leading to better sound customization.
- Sound Quality: Separating effects before and after the preamp can result in clearer and more distinct tones.
- Component Utilization: The method allows for the separate use of an amplifier’s preamp and power amp, providing more options for sound shaping.
Versatility
- Genre Adaptability: The setup can be adjusted to suit multiple musical styles, from rock to jazz.
- Live Performance: The method simplifies transitions between different tones and effects, making it easier to manage settings during a performance.
Setup Guide
Setting up the 4 Cable Method involves a series of connections between your guitar, effects pedals, and amplifier. Here’s a straightforward guide to get you up and running:
1. Connecting the Guitar to the Pedalboard
- Use a standard instrument cable to connect your guitar’s output jack to the input of your first pedal (usually a tuner or a compressor).
2. Routing to the Amplifier’s Input
- Connect the output of your last “pre-preamp” pedal (like overdrive or distortion) to the input of your amplifier using another standard instrument cable.
3. Effects Loop and its Importance
- Locate the “Send” and “Return” jacks on your amplifier; these constitute the effects loop.
- Use a patch cable to connect the “Send” jack to the input of your first “post-preamp” pedal (like modulation or delay).
- Use another patch cable to connect the output of your last “post-preamp” pedal back to the “Return” jack on your amplifier.
Critical Warning: Series vs. Parallel Loops
Not all Effects Loops are created equal. Before you start, check the back of your amp.
Series Loop (Ideal for 4CM)
- How it works: The entire signal leaves the preamp, goes through your pedals, and comes back.
- Result: Your Volume pedal and Mute functions on your board will work perfectly. 100% of the sound is processed.
Parallel Loop (The Problem Child)
- How it works: It splits the signal. Half stays inside the amp (Dry), and half goes to your pedals (Wet). They are mixed back together.
- The Danger: If your Multi-FX unit (Helix/GT-1000) has even 1 millisecond of digital processing latency, the “Wet” signal will be slightly delayed compared to the “Dry” signal. When they mix, they cause Phase Cancellation.
- The Symptom: Your tone sounds thin, hollow, or like a permanent flanger is on.
- The Fix: Turn the “Mix” knob on your amp’s FX Loop to 100% (making it act like a Series loop). If it doesn’t have a knob, set your Multi-FX unit to “Kill Dry” mode.
4. Final Connections and Checks
- Double-check all connections to ensure they are secure.
- Turn on your amplifier and pedals, starting with low volume settings.
- Gradually increase the volume and test each pedal to confirm the setup works as expected.
By following these steps, you should have a functional 4 Cable Method setup. This will allow you to take full advantage of both your amplifier and effects pedals, offering improved sound quality and greater tonal flexibility.
4 Cable Method and Multi-effect Units
In the case of multi-effect units, the connection methods are somewhat different. Here is a connection method with diagrams for the more popular devices available today:
Line 6 Helix
If you are connecting your amplifier up to a Line 6 Helix, you will want to hook itup according to the diagram below.
I have made colored lines that signify each of the 4 cables needed to make the connections.
| Cable | Connection |
|---|---|
| Red | Instrument to the GUITAR IN |
| Blue | Amplifier input to #1 Send |
| Green | Amp FX loop Send to #1 Return |
| Yellow | Amp FX loop Return to Output |
Keep in mind that there is still more that needs to be set up to make your gear play nice together and actually work.
You will need to set up the helix to have FX Loop blocks in the signal chain. Both Send and Return will need to be configured. Also, if your amplifier has effects loop level controls, those will need to set as well. This video will help you understand the connections.
Line 6 Pod Go
The Line 6 POD Go can also be used for a 4CM connected rig. This is similar to the Helix, and so the diagram above can be used in the same manner. I have also created a connection instruction below to allow you to hook it up correctly.
Simply connect each of the cables to your amp and the POD Go as listed below, and you will then only need to set up the software. This will allow you to configure the Line 6 POD Go and the effects you want to use.
| Cable | Connection |
|---|---|
| Red | Instrument to the GUITAR IN |
| Blue | Amplifier input to FX Loop Send |
| Green | Amp FX loop Send to Return/Aux |
| Yellow | Amp FX loop Return to Main Out Left/Mono |
Boss GT-100
Use the image below to connect to the Boss GT-100. In this diagram, the FX loop from the amplifier has been made visible for you once again.
There are 4 colored lines that signify each of the cables needed to make the connection to the Boss GT-100.
| Cable | Connection |
|---|---|
| Red | Guitar to Input |
| Blue | Amplifier input to Send of EXT loop |
| Green | Amp FX loop Send to Return of Ext Loop |
| Yellow | Amp FX loop Return to L/Mono |
Now, you need to set your GT-100 up in the software to insert the FX Loop block (S/R Block) up to send to your amp.
So make sure that you have an FX Loop block in the patches for this work. Also, if your amplifier has a send or return level control for the loop, those might need to be adjusted as well.
Fractal AX8
When connecting your amplifier up to a Fractal AX8, the diagram below will help you understand the layout.
There are colored lines that signify each of the cables needed to complete the connections with the Fractal AX8. The provided table will show you where they need connect.
| Cable | Connection |
|---|---|
| Red | Guitar to IN 1 |
| Blue | Amplifier input to OUT 2 L |
| Green | Amp FX loop Send to IN 2 L |
| Yellow | Amp FX loop Return to OUT 1 L |
Once the physical connections are made, set the AX8 up the way you like. But make sure that you are including an FX Loop block in your signal chain.
You will also want to make sure your Out 1 and 2 level controls are turned up close to max. This will get the right signals to the amplifier.
If your amplifier has the effects loop send or return level controls, those need to be adjusted.
Quad Cortex
Connecting your Quad Cortex in 4 cable method is just as easy as the other modelers. Make sure to have good quality cables and connect according to the table below.
| Cable | Connection |
|---|---|
| Red | Guitar to input #1 |
| Blue | Amplifier input to Send #1 |
| Green | Amp FX loop Send to Return #1 |
| Yellow | Amp FX loop Return to Out 3/L |
Once all your connections have been made, it’s now time to set up your signal path with the blocks on the quad cortex. One of the things to keep in mind is that the volume will need to be turned right up on the unit. For block set up, here is a great video to walk you through.
4 Cable Method Tips
Implementing the 4 Cable Method can significantly enhance your guitar tone, but to get the most out of this setup, here are a few tips:
Understand Your Effects
It’s crucial to know which effects sound best before the preamp and which ones perform optimally in the effects loop. For instance, gain pedals like distortions usually sound best before the preamp.
While time-based effects like delay and reverb often sound better in the loop. However, these are not hard and fast rules! The best setup can vary depending on your specific gear and personal preferences.
Experiment with Different Settings
Don’t be afraid to experiment with placing pedals in different parts of the signal chain. While there are general guidelines about pedal order, the best setup is often the one that sounds best to your ears. Try different combinations and listen to the results to find the optimal configuration for your rig.
Leverage Your Multi-effects Pedal’s Preamps
If you’re using a multi-effects unit with modeled preamps, don’t forget to experiment with these as well. You might find that some of these preamps offer a unique tone that complements your amp’s natural sound.
Troubleshooting: Why is it Hummming? (Ground Loops)
You hooked everything up perfectly, turned on the amp, and… BUZZZZZZ. Welcome to the downside of the 4-Cable Method: The Ground Loop.
Because you are connecting your pedalboard to the amp in two different places (the front Input and the FX Loop), you have created a giant electrical loop. If your pedalboard power supply shares a ground with your amp, this loop picks up interference like an antenna.
The Fixes (In Order):
- Isolated Power: Ensure your pedals are powered by a truly isolated brick (e.g., Voodoo Lab, Cioks), not a daisy chain.
- Cable Management: Don’t run your 4 cables parallel to power cords. Cross them at 90-degree angles.
- The “Hum Eliminator”: If the buzz persists, you need a transformer isolation box. Place a unit like the Behringer HD400 or Ebtech Hum Eliminator between the Amp Send and your Multi-FX Return. This breaks the ground loop instantly.
Conclusion
So as you can see, the 4 cable method can be a real benefit! The improved sound quality from effects can be a real game changer.
It can also allow you to switch between amp, pedal, and modeler preamps. This adds some great versatility! But it does come at the expense of a more complicated setup and potential noise issues.
Luckily enough, for those that want to make it work, there are solutions for all of it, and I would encourage you to try it!
I would also like to encourage you to try effects in different slots on your board or in your processor. Sometimes finding great tone lies in where your effects are placed in your chain!
