This service manual is designed to assist you in repairing and maintaining your BOSE 151 Environmental Speaker System. It contains detailed information about the system's components and how to troubleshoot and fix any issues that may arise. With clear instructions and diagrams, this manual is an invaluable resource for any BOSE 151 owner. Whether you're a professional audio technician or a DIY enthusiast, this manual will help you keep your system in top condition.