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ESP MM-04 Preamp Booster

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ESP MM-04 Preamp Booster

Stock status

Helsinki store: In stock
Turku store: Ask for availability
Wholesale: Ask for availability
Alexi Laiho Signature Electric Guitar Preamp & Booster, For EMG HZ Pickup, Master Volume Pot, Gain Trim, 4 Treble EQ Dip Switches, Solder Installation, Includes Output Jack, Battery Adapter and On/Off Mini Switch, Instructions Included
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NYT ILMAINEN TOIMITUS kaikille yli 50€ tilauksille!
You can also pay in installments
42.71€/kk - 3 kk Instalment
8.95€/kk - Tili
21.75€/kk - 6 kk Instalment



ESP MM-04 is a preamp booster that was originally custom designed for Alexi Laiho to his own specifications, and has since become an essential part of his trademark cutting edge guitar tone.

This sound is now available to all guitarists by joint development of the ESP Guitar Company and Musamaailma, ESP’s exclusive distributor in Alexi’s native Finland.

The Alexi Laiho MM-04 has four pre-set frequency switches a single trim pot for gain control, the same tools used by the world’s leading metal guitarist to create today’s most sought after heavy rock & metal sound!

The boost level is controllable by adjusting the trimmer pot. Boost range is +4.5dB minimum and +18dB at the maximum setting. You can choose 7 different treble EQ presets by adjusting the 4 dip switches. Alexi’s signature setup is created with an EMG HZ humbucker pickup and the following settings: Dip switches 2 and 4 are on, gain boost around 50 to 80%.


  • ESP MM-04 Preamp
  • Master Volume Pot
  • Onboard Gain Trimmer Pot +4.5dB - +18dB
  • Onboard 4x Treble EQ Dip Switches (2kHz-5kHz)
  • 1x 2-Way Gain Boost On/Off Switch
  • 1x Output Jack
  • 1x Prewired Battery Clip for 9V Battery
  • Includes Installation Instructions
Additional Information

Additional Information

Brand ESP