Detail 01
Mini enclosure
Takes roughly half the board width of a standard MXR box. Footswitch and knobs sit closer together, so mid-song tweaks are tighter.
Product detailSKU #1315669865151
MXRM66S Classic Overdrive Guitar Effects Pedal
aggressivehigh outputwarmmetalrockhard rock
1/3
Independent shopping perspective
The Korena take
Compact MXR overdrive in a mini enclosure. For players who want a straightforward drive and gain-boost pedal without giving up much pedalboard space.
Strong match
Who this is for
- Pushing a clean amp into breakup for rhythm and leads
- Crowded pedalboards with little space left
- Adding grit and output in front of an amp
Consider the trade-offs
When to look elsewhere
- Players wanting deep tone-shaping — controls are minimal
- Anyone needing high-gain distortion or metal saturation
- Boards where a standard-size enclosure is easier to reach
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Overdrive circuit
Adds clipping rather than replacing your amp voice. Your amp and guitar still shape the core tone.
Detail 03
Output level control
Lets you set the pedal louder than bypass, so it doubles as a solo boost, not just a dirt box.
Detail 04
Gain range from mild to aggressive
Low settings add edge and touch sensitivity; higher settings get punchy and cutting for lead work.
Final check
Know before you order
- 01No power supply or battery included — needs 9V from your board
- 02Mini enclosures usually have no battery compartment
- 03Knobs are close together; setting fine gain with a boot takes care
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this pedal need a power supply?
Yes — plan on a 9V supply from your pedalboard power brick. Budget for a spare output if your supply is full.
02Will it work with a clean amp?
That's its main use. It pushes a clean channel into breakup and adds the dirt your amp doesn't have.
03Is this enough gain for metal?
No. It's an overdrive, not a high-gain distortion. For metal it works better as a boost in front of a distorted amp.
04Does it fit a small pedalboard?
Yes — the mini housing is the point. It slots into gaps where a full-size pedal won't fit.
