The Bowers & Wilkins ASW-4000 is a high-performance subwoofer designed to deliver exceptional low-frequency reproduction for audio systems. Featuring a robust 12-inch paper cone woofer and a powerful 500-watt Class D amplifier, this sealed enclosure subwoofer provides deep, impactful bass with a frequency response extending down to 15 Hz. Its engineering emphasizes reliability and audio fidelity, making it suitable for discerning listeners seeking an immersive sound experience. The ASW-4000 offers versatile connectivity options, including line-level and speaker-level inputs, and features like adjustable crossover frequency and phase control for seamless integration into various audio setups.

This service manual provides comprehensive guidance for the maintenance and repair of the Bowers & Wilkins ASW-4000 subwoofer. It covers essential procedures such as disassembly and assembly, along with detailed information on crossover schematics and component values. The manual also includes technical specifications, operational details, and scheduling information to assist owners, technicians, and service professionals. By offering this in-depth technical documentation, the manual aims to ensure the continued optimal performance and longevity of the ASW-4000.