The Bose L1 PRO Series Sub2 is a high-output active portable bass module engineered to deliver powerful, deep low-frequency reinforcement for live sound applications including mobile entertainment, AV rental, live events, clubs, and performance venues. Designed as the larger, more powerful companion to the Sub1, the Sub2 features a unique 10-inch by 18-inch high-excursion RaceTrack driver—a stadium-shaped neodymium transducer that rivals the output of a conventional 18-inch woofer while maintaining a remarkably slim, portable cabinet profile. This innovative RaceTrack design optimizes the driver's surface area distribution, enabling a shallow enclosure depth that saves valuable stage and transport space without compromising acoustic performance. The powered subwoofer integrates a 1000-watt Class-D amplifier, achieving an impressive frequency response down to 37 Hz and a maximum SPL of 123 dB, providing the foundational low-end power needed for both recorded music playback and live instrument reinforcement.

Purpose-built for seamless integration with the Bose L1 Pro32 line array system, the Sub2 incorporates proprietary SubMatch connectivity—a single cable that carries both power and audio between the subwoofer and the L1 Pro32 power stand. This connection automatically configures the system's crossover and equalization settings for optimal performance, while requiring only one AC power outlet for the entire setup when the L1 Pro32 is plugged into the Sub2. The Sub2 can also be paired with virtually any portable PA system via its dual combo XLR-1/4-inch line inputs and XLR line outputs, which feature adjustable crossover modes. An M20 threaded pole socket on the side of the enclosure allows deployment of a speaker pole for supporting any compatible loudspeaker up to 34 pounds (15.4 kilograms), including the Bose S1 Pro system for creating a compact micro-PA configuration.

Beyond standalone operation, the Sub2 supports stacking multiple units for scalable bass reinforcement, and when used in pairs, it can be configured for cardioid mode. Cardioid operation focuses low-frequency energy forward toward the audience while reducing rearward bass spillage that can cause feedback issues on stage or disturb neighbors in outdoor settings. The subwoofer is housed in a durable MDF wood enclosure with a sleek black finish. Weighing approximately 23.4 to 24 kilograms (51.7 pounds), the Sub2 includes a protective slip cover for safe transport and storage, and is designed for rapid setup, making it an essential tool for working musicians, DJs, and sound professionals who demand high-impact bass in a manageable form factor.