The Proficient Protege outdoor landscape series is a high performance speaker system that over delivers on value and price. Each Protege outdoor speaker system comes with either an 8 in. burial subwoofer or an all new above ground hardscape subwoofer and comes matched with four 4 in.Protege Satellite speakers for an exceptional sound experience. Unlike high performance landscape systems that require expensive high-power amplifiers, the Protege Landscape Series is designed to be used with lower powered distributed audio amplifiers or extended audio zones (like Zone 2) from conventional AVRs. When using 4 ohm stable amplifier or AVR, each 4.1 system can be expanded up to an 8.2 system.