Looking to add depth to your sound system This used Bose B2 Bass Module Unpowered Subwoofer is in great condition and delivers powerful, low-frequency performance to complement any Bose L1 Model 1S or Model II system. With two high-performance 10" woofers housed in a compact, road-ready enclosure, the B2 provides increased output and rich, defined bass suited for live performances, DJ setups, or home studio use. The rear-panel switch allows selection of Normal, + or - bass levels to fine-tune output to your environment. Though unpowered, it connects seamlessly via the ToneMatch or Power Stand base units (sold separately) and requires no external power. This subwoofer shows minimal signs of wear and has been fully tested to ensure excellent functionality. Ideal for musicians and audio professionals seeking that signature Bose clarity with added low-end punch. Ready to deliver compelling bass performance wherever your sound takes you.