The Anchor Liberty MPA‑4500 is a rugged, battery-powered portable PA system designed for events like weddings, presentations, fitness classes, and outdoor gatherings. This all-in-one unit integrates a 70 W MOSFET amplifier, speaker, mixer, and battery into a single enclosure. It delivers plenty of power and clarity—boasting up to 117 dB SPL and running 6–8 hours per charge—making it suitable for audiences of 100+ and even up to 1,000 when paired with a companion speaker.