This original BOSE 901 Powered Direct/Reflecting Speaker System Service Manual is a must-have for any vintage audio enthusiast. With its detailed instructions and diagrams, this manual will guide you through the process of maintaining and repairing your prized speakers. Made in the United States, these speakers are high-quality and durable, perfect for any music lover. Whether you're a collector or just enjoy the sound of vintage audio, this manual is an essential addition to your collection. It provides all the necessary information needed to keep your BOSE 901 speakers in top condition and running smoothly. Includes service supplement.