PAS-4.1-HS is part of a value-priced outdoor speaker kit that over-delivers on performance. Not every outdoor space can accommodate an in-ground subwoofer, so the PAS-4.1-HS introduces an all-new Hardscape above-ground Subwoofer paired with four 4" Satellite speakers for an exceptional sound experience. Unlike high performance landscape systems that require expensive high-power amplifiers, the series is 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.