The AVS 2000 is designed to stabilize power line fluctuations and maintain constant voltage to your professional components. You Need High Performance and Great Sound For Consistent 120V Output Your professional audio equipment was designed to work at 120-volts AC. It's so simple it's easily taken for granted. There's just one problem: 120-volts may not be the voltage your sensitive audio equipment gets. Voltage irregularities can be caused by electric system brownouts that local power utility companies use to manage peak demands. Studio irregularities and sags can be caused by draining more power than the wiring was really designed to support. Even worse are the common sags that occur when heavy appliances like air conditioners and refrigerators start up. The consequences may be increased distortion and reduced dynamic range, a click or pop or speed variation, or even total equipment failure resulting from components literally burning themselves up trying to make do with too-low voltage (like a car stuck in first gear trying to go fast). On the road, the quality of electricity in the venues you play can vary widely, and the potential for damaging your sound and your gear with under voltage or over voltage is ever-present.