Description
Reviews
| Brand | - |
| Category | Root / Musical Instruments/Guitars/Pianos/Accessories |
| Origin | - |
| Brand | ESP |
| Model Series | MM-04 Boost |
| Signature Artist | Alexi Laiho |
| Circuit Type | Active Preamp |
| Gain Control | Variable Active Gain |
| Power Source | 9V Battery |
| Compatible Instruments | Electric Guitars |
| Installation Type | Drop-in Replacement |
| Tone Profile | High-Output Metal |
| Country of Origin | Japan |
Anonymous
Mar 30, 2026
Rating: 5/5
Rest in power Alexi, great gear
Buying this felt like honoring a hero. The performance matches the legacy. Fast shipping and well packaged by the seller too.
Anonymous
Mar 14, 2026
Rating: 5/5
Perfect tribute to a legend
This preamp captures that classic Alexi tone perfectly. The gain structure is tight and aggressive without getting muddy. Installation was straightforward in my standard strat body.
Anonymous
Mar 10, 2026
Rating: 4/5
Great sound, battery life could be better
The tone is fantastic for modern metal genres. Very clear highs and punchy mids. Just remember to unplug your cable when not playing as it drains the 9V battery quickly.
Anonymous
Mar 04, 2026
Rating: 4/5
Solid upgrade
Good build quality and authentic ESP feel. It took a little tweaking of my amp settings to dial it in perfectly, but once set, it sings.
Anonymous
Mar 04, 2026
Rating: 5/5
Transformed my cheap guitar
I installed this in a budget instrument and it sounds like a high-end custom shop guitar now. The active circuit really boosts the signal and clarity.
Anonymous
Mar 03, 2026
Rating: 5/5
Exactly what I needed for live gigs
Cuts through the mix beautifully. The boost function is smooth and doesn't introduce unwanted noise. Highly recommended for anyone playing heavy styles.
Q: Can I use this with passive pickups or does it replace them?
A: This unit replaces your existing pickup system entirely. It is an active preamp and pickup circuit combined, not just a booster pedal.
Q: What is the warranty period for this item?
A: This product comes with a standard 1-year manufacturer warranty covering defects in materials and workmanship.
Q: Does this come with the battery included?
A: No, the 9V battery is not included in the package. You will need to purchase one separately.
Q: Is the gain knob push-pull for coil splitting?
A: No, the gain knob on the Alexi Laiho signature model controls the active gain level only and does not feature a push-pull coil split function.
Q: Will this fit in a guitar with standard humbucker routing?
A: Yes, the MM-04 is designed as a drop-in replacement for most standard humbucker cavities, though minor modifications may be needed for some non-standard bodies.
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