Here's what will happen after you install Pioneer's GM-X554: Your music will sound insanely clean and powerful. You will fall in love with your vehicle again, and you'll have a hard time wiping that smirk off your face. Why? This explosive 480-Watt, 4-channel amplifier features a PWM regulated MOSFET power supply, and gold-plated terminals and inputs/outputs. Plus, a built-in variable crossover cuts down on install time. Life will never be the same.