The AP-15TUCR is a double re-entrant loudspeakers which delivers 15-watts of continuous power handling, superior intelligibility and unparalleled efficiency. The AP-15 Series operates within a nominal frequency response range of 400-14,000 Hz and offers a sensitivity of 120dB at rated power to provide clear voice and signal communication. The trademarked squared-bell design signifies Atlas Sound quality and reliability. The Omni-Purpose® mounting bracket achieves precise positioning in the vertical and horizontal planes with a single adjustment and includes provisions for loudspeaker installation on conventional surfaces as well as for strapmounting on I-beams or pillars. A built-in, 5 mfd capacitor is provided for line supervision. All models meet or exceed the UL Listed standards for audible signal appliances, standard 1480—Speakers for Fire Protective Signaling Systems and California State Fire Marshal. AP Series loudspeakers are U.S. made to assure superior service reliability. Weather-resistant construction is metal and matching ABS plastic with metal components finished in grey epoxy.