Guitar & Bass Review
MXR M104 Distortion Plus Review: Simple Analog Drive
The MXR M104 Distortion Plus Guitar Effects is a compact distortion pedal with an output knob, distortion knob, and footswitch. The bundle includes patch cables. The listing omits amplifier specifications such as wattage, speaker, and dimensions, so it should be paired with an existing amplifier rather than used alone.
Our Verdict
Research Score 60/100The MXR M104 Distortion Plus Guitar Effects is a straightforward distortion pedal, not a standalone amplifier. The listing confirms only two controls, a footswitch, and included patch cables. That makes it easy to use, but it lacks modern conveniences like headphone output, app control, or amp modeling. The absence of published power and speaker specs makes sense because this device feeds an amplifier rather than driving a speaker. For players who already own an amp and want a basic, no-frills distortion, this bundle is practical. For those expecting a self-contained practice amp or studio interface, it will fall short. Overall value depends on the simplicity you need.
Editorial research score based on published specifications and documented features, not a customer rating or lab test.
MXR
MXR M104 Distortion Plus Guitar Effects
Best for: Players who want a simple distortion pedal to push an existing amplifier into saturated tones and who need patch cables included.
Skip it if: You need a standalone amplifier, headphone practice, or built-in effects and amp modeling.
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Listing verified: October 2026
Who Should Buy It
Buy it if
- Guitarists wanting a basic distortion pedal to pair with an existing amp
- Beginners looking for an affordable first drive pedal with cables included
- Players who prefer analog-style gain and simple knob control
- Anyone who values a straightforward on/off footswitch without digital menus
Skip it if
- You do not already own a guitar amplifier, because this is not a powered amp
- You need silent practice via headphones or USB recording
- You want built-in reverb, delay, or other effects beyond distortion
Key Specifications
| Power output | Not published in listing |
| Speaker | Not published in listing |
| Amp models or channels | Not published in listing |
| Effects | Distortion |
| Inputs and outputs | Not published in listing |
| Headphone and line out | Not published in listing |
| Bluetooth and app | Not published in listing |
| Weight | Not published in listing |
| Dimensions | Not published in listing |
| Included accessories | Patch cables |
Overview
The MXR M104 Distortion Plus Guitar Effects appears in this listing as a distortion pedal bundled with patch cables, despite being categorized under guitar or bass amplifiers. The published feature bullets are minimal: an output knob, a distortion knob, and a footswitch. These elements point to a simple analog-style gain device meant to sit between a guitar and an amplifier.
The listing does not provide amplifier specifications such as power output, speaker size, or amp models. That absence makes sense for a pedal, not a powered amp. Because the product is a distortion effect, it relies on an existing amplifier to produce sound. Buyers should treat this as a signal-shaping box, not a standalone sound source.
Amp Models and Tone
The MXR M104 does not include multiple amp models or channels in the published description. Instead, the listing focuses on two controls that shape the drive character: output gain and distortion amount. On paper, this suggests a straightforward saturation circuit that adds clipping and volume boost to the signal.
The distortion knob controls the amount of distortion, while the output knob sets the output gain sent to the next device. That two-knob layout is typical of classic distortion pedals, giving players a quick way to go from mild overdrive to heavy clipping. The listing omits any tone stack or EQ control, so final tone depends heavily on the amplifier used.
Effects and Features
The only effect named in the listing is distortion. There is no mention of reverb, delay, modulation, or channel switching. The footswitch toggles the effect on or off, which is the primary performance feature. This makes the pedal simple but limited compared to multi-effects units.
One notable inclusion in the bundle is the patch cables, as indicated by the listing title. Those cables allow immediate connection between guitar, pedal, and amplifier without buying extra accessories. The feature bullets repeat the output knob description, but no additional effects or hidden functions are listed.
Power, Speaker and Volume
The listing does not publish a power output rating or include a speaker. This is expected because the MXR M104 is a pedal, not an amplifier with a power section. Volume changes come from the output knob, which sets signal gain rather than speaker wattage.
Without a built-in speaker or power amp, the M104 cannot produce sound on its own. It must feed an amplifier or recording interface. The output knob can boost the signal to drive an amp harder, but the actual loudness depends on the amplifier volume.
- Output knob sets output gain to the amplifier
- Distortion knob controls amount of distortion
- Footswitch toggles effect on and off
- No built-in speaker or power amplifier
- No power output rating published in the listing
- Patch cables included for connection
Build and Portability
The listing does not provide dimensions or weight, so the physical size cannot be confirmed from the published data. MXR pedals are generally known for compact, pedalboard-friendly enclosures, but that specific detail is not listed here. The product type as a guitar effects pedal implies a small box.
The included patch cables add to the bundle's portability for players who need to wire a pedal into a rig. The lack of published weight makes it hard to compare directly to other pedals. Buyers who require exact measurements should check the physical unit or contact the seller.
Connectivity and Apps
The listing does not mention Bluetooth, app support, or USB connectivity. There is no headphone or line out listed. For a basic analog-style distortion pedal, that is normal; the signal path is guitar to pedal to amplifier using standard instrument cables.
The patch cables included in the bundle provide the necessary connections for a simple setup. The product listing does not specify the input and output jack types, but a standard distortion pedal typically uses quarter-inch instrument jacks. No digital editing or firmware updates are suggested by the published information.
Setup and Daily Use
Setup appears simple based on the listing: connect a guitar to the pedal input, connect the pedal output to an amplifier, and engage the footswitch. The two knobs set output level and distortion amount, so there are no deep menus or preset banks to learn.
Daily use would likely involve adjusting the distortion knob for the desired amount of grit and using the output knob to balance levels between bypassed and engaged states. The footswitch provides quick on/off control during a song. The included patch cables remove one common barrier for new pedal users.
Home Practice Versus Stage
At home, the MXR M104 can add distortion to a small practice amplifier, giving more aggressive tones at low volume. Since the pedal has no headphone output, silent practice is not possible without additional gear. The output knob can help match the pedal's level to the amp's clean channel.
On stage, the pedal can serve as a simple boost or drive into a tube or solid-state amplifier. The footswitch is convenient for live use, but players who need multiple gain stages or effects may find it limiting. Because the listing omits power handling details, it is best paired with an amp that already works well at stage volume.
Who Should Buy It
This bundle targets players who already own an amplifier and want a basic distortion sound without complexity. The inclusion of patch cables makes it a convenient starter package for a first pedal. Guitarists who prefer manual controls over digital screens will appreciate the two-knob layout.
The MXR M104 is not for someone seeking a standalone practice amplifier, headphone jacks, or built-in amp modeling. It is a pedal first and foremost. Buyers who need a simple, durable-sounding drive to push an amp will likely find it useful, but they should confirm the physical condition and exact specs if those matter.
Verdict
The MXR M104 Distortion Plus Guitar Effects is a no-frills distortion pedal, not an amplifier. The listing confirms only output gain, distortion amount, a footswitch, and patch cables. That simplicity keeps operation easy, but it also means the device lacks modern connectivity, headphone output, and built-in speaker simulation.
For the right user, this is a practical way to add distortion to an existing amp without spending on extra cables. The published information is thin, so buyers who prioritize exact specs like weight or dimensions will need to ask the seller. Overall, it earns a modest score because it does one job simply and includes the necessary cables, but it cannot replace an amplifier or a multi-effects unit.
Strengths and Limitations
Strengths
- Output knob sets output gain to the amplifier
- Distortion knob controls amount of distortion
- Footswitch toggles the effect on and off
- Bundle includes patch cables for immediate connection
- Simple two-knob layout with no complex menus
Limitations
- No published power output, speaker, weight, or dimensions
- No built-in amp models or speaker simulation
- No headphone or line out for silent practice
- No Bluetooth or app connectivity
- Only one effect type, no additional modulation or delay
How We Scored It
Scores reflect published specifications, documented features and value against the alternatives below. They are editorial research scores, not laboratory measurements.
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MXR M104 Distortion Plus Guitar Effects
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About This Review
Mandrillis Team
The Mandrillis editorial team researches and compares audio and music gear using manufacturer documentation, verified specs and real buyer feedback, so you can make a confident purchase without wading through marketing claims.
Read our full research methodology.