Proficient Protege is a value-priced outdoor speaker kit that over-delivers on performance. The PAS-4.1-BU includes four 4″ Protege satellite speakers and an 8″ Dual Voice Coil Burial Subwoofer for an exceptional sound experience. Unlike high performance landscape systems that require expensive high-power amplifiers, the Protege Landscape Series are designed to be used with lower powered distributed audio amplifiers or extended audio zones (like Zone 2) from conventional AVRs. The system can be expanded to up to an 8.2 system.