AD-C6T-HP The in-ceiling speaker is a 2-way system designed for high-power applications that shall incorporate a 6.5-inch professional-grade coaxial transducer with a common-motor compression driver. The speaker is of the blind mount type, with an PC+ABS baffle and a stamped steel back can. The system shall meet the following performance criteria: coverage angle of 120 degrees (3 - 10kHz); frequency response of 58 Hz to 20 kHz +0/-10 dB, measured on axis; sensitivity of 89 dB SPL in half space at 1 meter with an input of 4 V RMS; maximum continuous output of 109 dB SPL; maximum peak output of 115 dB SPL on axis at 1 meter; power handling of 120 watts for 8 hours with an IEC noise signal; recommended amplifier power of 180 watts; nominal impedance of 16 ohms. The loudspeaker shall have a switchable low-distortion, wide-bandwidth laminated core transformer with taps for 60, 30, 15, and 7.5 watts at 70V and 60, 30, and 15 watts at 100V. The system shall be switchable between 16Ω (bypass) and constant-voltage operation. The speaker bezel and grille shall have a white (RAL 6010) paintable finish with UV inhibitors to prevent discoloration. The loudspeakers are boxed in pairs, including C-rings and matching rails for suspended ceiling applications. The loudspeaker shall meet or exceed requirements in UL1480A. The wiring and bobbin for the switchable transformer shall be listed under UL1007 and UL4820L, respectively. The baffle shall meet UL94 flammability ratings and shall comply with IEC60849/EN60849 safety standards. The loudspeaker's overall diameter shall be 11.04-in (28.05 cm), with a cutout diameter of 9.65-in (24.5cm), and a mounting depth of 9.2-in (23.5 cm). The loudspeaker shall weigh no more than 13.4 lbs. (6.07 kg).