Bowers & Wilkins B&W DM-550 , Service Manual • 100 per cent satisfaction guaranteed • 100 per cent Virus Free • PDF format suitable for Windows XP, Vista, 7 , 8 and Mac • Disassembly & Assembly Procedures • Crossover schematics • Crossover components values • Dissasembly and assembly schedule for each unit • B&W order code , for every part of the speaker • Wiring diagrams • Most Complete Service Manual Available • Written by the Manufacturer • Used by the Dealership Technicians • You can print the specific pages you need to accomplish the repairs required or print the whole manual