The PL200M 5x4 Multisource/Multizone Amplifier from Speco Technologies of Amityville, New York, features matrix technology that allows it to route five separate inputs to four distinct zones. Assigning a source to a zone is accomplished by pressing a button. Each source has separate gain, treble, bass, and volume controls. Three inputs feature a universal plug that allows the connection of an XLR or 1/4-inch plug into the same unit. The 160-watt amplifier also features a telephone paging function and monitor output for music-on-hold feature.