PowerZone PZi amplifiers feature a unique and attractive ZoneKool™ heatsink. Heat dissipation is one of the most important factors in amplifier design and Crunch’s ZoneKool system uses CAD extruded industrial grade aluminum for superior heat dissipation. Crunch designed the PowerZone amplifiers with simplicity and flexibility in mind, so they added variable bass boost control and variable Versa Cross™ low-pass crossover, all of which allow you to tweak the sound to your personal taste. Matching a PowerZone amplifier to your vehicle is easy with a 0.2-5 volts input gain adjustment. Internally, you’ll find the latest SEPP (Single Ended Push Pull) class A/B operation, full MOSFET circuitry, and PowerZone PWM (Pulse Width Modulation) power supply. The included remote bass level knob give you heart-pounding control at your fingertips. Center backlit logo bathes your ride with a cool blue glow.