The Bose B1 is the smaller of the subs matched with the Bose L1 Tower Array PA Systems. I use it with the Model II System as a compact solution for smaller venues.

Only selling as part of an upgrade program. Works perfectly as expected. Just a few cosmetic scuffs as this one didn't come with a cover.

The Bose B1 Bass Module is a compact, lightweight passive subwoofer designed to integrate with Bose L1 Model II and Model 1S portable PA systems.

• Drivers: Two high-excursion 5.25-inch woofers.
• Dimensions: 38 cm high x 26 cm wide x 45 cm deep (15" x 10.2" x 17.7").
• Weight: 11.4 kg (25.1 lbs).
• Impedance: 8 ohms nominal for a single module; drops to 4 ohms if two B1 modules are connected to a single power stand.
• Design: Rugged enclosure with interlocking feet allowing up to four modules to be stacked.