This document is the owner's manual for Custom Installation Series CCM817, describing the features and characteristics of the product.
This manual introduces the Bowers & Wilkins Custom Installation Series CCM817 ceiling speaker, outlines the five‑year limited warranty (two years for electronic components) and gives safety and environmental information. It explains how to claim warranty service and what documentation is required.
Detailed installation guidance covers positioning, required cavity volume, recommended cable resistance, mounting procedures, and optional custom finishing. The guide includes diagrams for front, surround, and multi‑channel setups, as well as tips for damping cavities and avoiding magnetic interference with nearby equipment.
| Recommended cable resistance (non‑critical) | below 0.5 Ω |
|---|---|
| Recommended cable resistance (best results) | below 0.2 Ω |
| Warranty period (product) | 5 years |
| Warranty period (electronics) | 2 years |
The limited warranty is valid for five years from the date of purchase, or two years for electronic components.
Keep the speakers at least 0.5 m (20 in) from wall or ceiling edges.
Loop resistance should be below 0.5 Ω for non‑critical installations and below 0.2 Ω for best performance.