The CFX42 is developed specifically for the multitude of applications needing full-size performance from a compact loudspeaker that can be easily mounted in stair treads, walls and ceilings. It features a 1-inch high frequency compression driver with a 1-inch throat coupled to a diffraction slot and dual 4-inch woofers. The diffraction slot eliminates high frequency beaming and provides wide angle coverage out to 20 kHz and beyond. The dual high-efficiency 4-inch woofers produce a strong low end. Together, the 1-inch HF driver and dual 4-inch woofers deliver a surprisingly high 122 dB peak output level from 300 Hz to 20 kHz. The compact CFX42 mounts easily between 16-inch studs (it's only 14-3/8-inch wide by 5-3/8-inch high) in stair treads, stage lips, walls and ceilings. Protection against damage is provided by a heavy gauge steel grille. An optional heavy gauge metal back box is available for applications where building codes require a metal enclosure or the loudspeaker will be installed in concrete.