Seventy-volt PA subwoofers connect to a high-impedance distributed-audio amplifier, while low-impedance models, such as 8-ohm subwoofers, connect to an amplifier designed for low-impedance loads. When integrating with full-range speakers, choose a subwoofer and amplifier with matching impedance requirements, and use models with satellite outputs or built-in high-pass filtering when available to simplify connections and help create a smooth crossover.

When choosing PA subwoofers, consider the installation environment, visibility, and mounting method: surface-mount models attach to walls or other structures, pendant models suspend from ceilings in commercial spaces, and burial models install underground for discreet landscape audio. Also check the subwoofer’s connection type, power requirements, weather protection, and crossover or satellite integration to match the amplifier, speakers, and coverage needs.

Built-in crossovers help divide low frequencies between the PA subwoofer and connected satellite speakers, while a high-pass filter can support smoother integration and reduce the need for separate crossover equipment. Satellite connections may simplify wiring and amplifier planning by allowing satellites and subwoofers to share an amplifier channel, including systems that combine low-impedance satellites with a high-impedance subwoofer connection when the equipment supports it.

For outdoor PA subwoofers, compare weather-resistant construction, UV protection, temperature tolerance, and enclosure ratings, along with whether the design supports direct burial, surface mounting, hardscape placement, or pendant installation. Also review cable-routing details, such as stake-integrated wire paths, accessible connection points, included placement hardware, and any satellite connection or crossover features that can simplify installation.