The CIS991 ceiling loudspeaker features a powerful 3-way design that provides exceptional performance, especially in high ceiling, large-space applications. The CIS991 (80-degree by 80-degree dispersion) incorporates four 5.25-inch LF cone woofers, four 4-inch MF cone woofers and a 1-inch-exit HF compression driver mounted on a large horn that fosters superior pattern control. The CIS991 is supplied with an integral 70V/100V line transformer, rated to a maximum of 128 watts. Tap settings are adjustable by means of a recessed rotary switch on the front bezel that allows selection of 128-, 64-, 32-, and 16-watt taps at 70 volts, and 128-, 64-, and 32-watt taps at 100 volts. In addition, the transformer can be bypassed, presenting an 8-ohm load to low-impedance systems. A sealed, painted, 18-gauge steel back can is included, and designed to mount in a 24-inch ceiling grid. The back can includes a recessed Euroblock input connector, with detachable mating plug, concealed behind a hinged metal cover plate. Mounting is accomplished using the integral eyebolts on the rear to suspend the loudspeaker with optional, adjustable, wire rope rigging.
| Operating Mode | Passive |
| Operating Range | 82 Hz to 20 kHz |
| Beamwidth | 80° (h) x 80° (v) |
| Power Handling/Output | 200 W (passive)/115 dB (Average) |
| Connections | 2 input terminal; 2 loop-thru output terminal |
| Rigging/Mounting | 4 mounting/suspension points |
| Dimensions/Weight | 22.6"x22.6"x9.05"/48lbs |
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