The Bowers & Wilkins 804S, part of the esteemed 800D series, represents a pinnacle of audio engineering, designed for discerning listeners seeking unparalleled sound reproduction. This model integrates advanced acoustic technologies, including a Nautilus™ tube-loaded aluminum dome tweeter, an FST™ midrange cone with Kevlar® weave, and dual 6.5-inch Rohacell® cone bass drivers, delivering a frequency response of 38Hz - 20kHz ±3dB. Its robust construction, with dimensions of 996 mm in height, 238 mm in width, and 343 mm in depth, coupled with a weight of 24 kg, underscores its substantial build quality. The 804S is engineered for optimal performance in dedicated listening environments, offering exceptional clarity, dynamic range, and deep, controlled bass.

This comprehensive service manual provides essential information for the maintenance, repair, and optimal use of your Bowers & Wilkins 804S loudspeakers. It details critical procedures, including disassembly and assembly, crossover schematics, and recommended maintenance for both cabinet and driver components. The manual also covers technical specifications, performance data such as sensitivity and impedance, and setup guidelines for ideal placement. By following the instructions within this manual, owners and technicians can ensure the longevity and peak performance of these high-fidelity audio instruments, maintaining the integrity of their sound reproduction capabilities.