NUX METALCORE-DELUXE-MKII High Gain Preamp PedalThe NUX Metal Core Deluxe MKII is a high gain preamp pedal that gives you all the metal you need in one compact pedal. You cant destroy the Metal! The Metal Core Deluxe MKII has 3 great whopping sounding replica preamps for you to select from. Utilising NUXs Impulse response, you can go ampless as it simulates the projection a cabinet would give you. Features 3 high gain Amp Models in a compact enclosure. Duo Rect: Based on Mesa Boogie Dual Rectifier.