SOUND TOWN PAC180X6PD4B COMMERCIAL AUDIO SET: The Sound Town PAC180X6PD4B commercial audio bundle includes (1) Sound Town PAC180-6 power amplifier and (3) STPDS-4B-PAIR (6 in total) all-weather pendant speakers PAC180-6 POWER AMPLIFIER: The Sound Town PAC180-6 amplifier works with 70V/100V or 4~16 ohm low impedance speakers, delivering 180W of power output. It supports Bluetooth and has 6 zones with individual volume controls. Built-in clipping limiter protects your speakers and amp from overheating STPDS-4B IP 66 WEATHER-RESISTANT SPEAKERS: Includes (3) STPDS-4B-PAIR (6 in total) IP 66 weather-resistant pendant speakers, each equipped with 4 woofer and a coaxial 1 neodymium compression driver. Install the speakers as pendant speakers, wall-mounted, or landscape ground-mount setups that suit your setup (3 types of installation components included in the package)