[. . . ] The loudspeaker features a waveguide coupled titanium coated dome tweeter. The EVID C4. 2 loudspeaker utilizes a 2nd order crossover network at 3. 3 kHz, with a comprehensive protection circuit to protect the network, woofer, and tweeter drivers from excessive power levels. [. . . ] The EVID C4. 2 loudspeaker utilizes a 2nd order crossover network at 3. 3 kHz, with a comprehensive protection circuit to protect the network, woofer, and tweeter drivers from excessive power levels. The C4. 2 utilizes a transformer that offers a selection of 1. 88 (70-V only), 3. 75, 7. 5, 15 or 30 watts delivered to the loudspeaker system using either 70-V or 100-V lines, or 8 ohm bypass. The perforated grille is finished in semi-gloss white powder-coated enamel. The rear enclosure is constructed from zinc-plated, heavy gauge steel. The rear enclosure, with fiberglass damping material, provides an optimum internal volume for extended low-frequency performance. Pressure sensitivity, 86 dB SPL at 1 meter (3. 3 feet) on axis with one watt of pink noise (ref. The loudspeaker shall be 181 mm (7. 1 in. ) in diameter and 176 mm (6. 9 in. ) deep. (6. 0 lb) The coaxial ceiling loudspeaker shall be the Electro-Voice ® model EVID C4. 2. Frequency Response: Block Diagram: Beamwidth: Dimension Drawings: Directivity: PerformanceMatch: · · · · · · · EVID C10. 1 Subwoofer CPS-1 Power Amplifier CPS-2 Power Amplifier CPS-2T Power Amplifier MA-1206 Mixer Amplifier MA-1212 Mixer Amplifier 301258-000 EVID C4. 2 Part Number 12000 Portland Avenue South, Burnsville, MN 55337 Phone:952/884-4051, Fax:952/884-0043 www. electrovoice. com © Telex Communications, Inc. For customer orders, contact Customer Service at: 800/392-3497 Fax: 800/955-6831 Europe, Africa, and Middle East only. For customer orders, contact Customer Service at: + 49 9421-706 0 Fax: + 49 9421-706 265 Other International locations. [. . . ] (6. 0 lb) The coaxial ceiling loudspeaker shall be the Electro-Voice ® model EVID C4. 2. Frequency Response: Block Diagram: Beamwidth: Dimension Drawings: Directivity: PerformanceMatch: · · · · · · · EVID C10. 1 Subwoofer CPS-1 Power Amplifier CPS-2 Power Amplifier CPS-2T Power Amplifier MA-1206 Mixer Amplifier MA-1212 Mixer Amplifier 301258-000 EVID C4. 2 Part Number 12000 Portland Avenue South, Burnsville, MN 55337 Phone:952/884-4051, Fax:952/884-0043 www. electrovoice. com © Telex Communications, Inc. For customer orders, contact Customer Service at: 800/392-3497 Fax: 800/955-6831 Europe, Africa, and Middle East only. [. . . ]