The Professional Monitor Company's AB1 transmission line monitor loudspeakers are suitable for mid and farfield applications. The AB1 is a little taller compared to its width than most studio monitors. The cabinet work is impeccably constructed and available in a choice of wood veneers. The bass/mid driver is a 9-inch (240mm) unit with a 4-inch (100mm) voice coil, while the high frequencies are handled by a l.l-inch (28mm) soft dome tweeter featuring double chamber construction.