Why does my fuzz sound different in a matrix switcher?

Some vintage-style fuzz pedals (such as Fuzz Face and Tone Bender style circuits) are designed to interact directly with your guitar's passive pickups. This interaction is a large part of what gives these pedals their characteristic sound and allows them to clean up beautifully when you roll back your guitar's volume.

When a buffer or another active pedal is placed before one of these fuzzes, the fuzz no longer receives the signal directly from the guitar pickups. Instead, it receives a low-impedance signal from the preceding device, which can change:

• The overall character of the fuzz
• The amount of gain and distortion
• The frequency response
• How well the fuzz cleans up with your guitar's volume control
• The dynamic feel of the pedal

This behaviour is normal and is a characteristic of many vintage fuzz designs.

How does this affect a matrix loop switcher?

One of the main advantages of the ML10X is that it allows you to place pedals in virtually any order.
However, this flexibility also means that the position of a vintage fuzz can change from preset to preset.
For example:
Preset 1
Guitar → Fuzz → Delay → Reverb
The fuzz is first in the signal chain, which is generally the preferred position for vintage-style fuzz pedals.
Preset 2
Guitar → Compressor → Overdrive → Fuzz → Delay
In this preset, the fuzz is now receiving the output of the overdrive rather than the guitar pickups. Since the overdrive has an active, low-impedance output, the fuzz will behave differently from when it is connected directly to the guitar.
In other words, once another active pedal is placed before a vintage fuzz, it is no longer operating under the conditions it was originally designed for.

Does this mean I shouldn't put my fuzz inside the ML10X?

For many vintage-style fuzz pedals, yes.
If preserving the traditional behaviour of the fuzz is important to you, the best solution is to place it before the ML10X:
Guitar → Fuzz → ML10X → Remaining Pedals
This allows the fuzz to remain directly connected to your guitar regardless of how you rearrange the rest of your pedalboard.

What about modern fuzz pedals?

Not all fuzz pedals behave this way.

Many modern fuzz designs include input buffering or are specifically designed to work well after buffers, wireless systems, compressors and other pedals. These pedals generally work perfectly inside the ML10X and can be freely reordered like any other effect.

If you're unsure, check with the pedal manufacturer or simply compare the sound with and without a buffered pedal before it.

Frequently Asked Questions

Can I still use a vintage fuzz inside the ML10X?

Absolutely.
The fuzz will still function normally—it simply may not sound exactly the same as when connected directly to your guitar. Some players actually prefer the tighter, more consistent sound of a buffered signal.

Why doesn't putting the fuzz first inside the ML10X completely solve the problem?

Even if the fuzz is first within the routed signal chain, the signal reaching it may still pass through the ML10X's input circuitry before arriving at the fuzz. This means the electrical interaction between the guitar pickups and the fuzz may not be identical to plugging the guitar directly into the fuzz.

Is this a limitation of the ML10X?

No.
This is a characteristic of virtually all programmable loop switchers, matrix switchers and audio routers. The ability to freely reorder pedals means that, at some point, a vintage fuzz may end up after another active device. When that happens, the fuzz no longer receives the direct pickup interaction that these circuits were originally designed around.

Recommendation

If you use a vintage-style fuzz and want its classic response and guitar-volume cleanup, we recommend placing it before the ML10X.
If you use a modern fuzz that is designed to work after buffers, it can generally be placed inside the ML10X and freely reordered without issue.

Updated on: 10/07/2026