User manual ELECTRO-VOICE 205-S DATASHEET

[. . . ] The voice coil shall have a nominal diameter of 25. 4 mm (1. 0 in. ) and length of 7. 6 mm (0. 3 in. ) and shall operate in a gap of not less than 1. 0 T (10, 000 Gauss). The loudspeaker shall exhibit a sensitivity (SPL, 1 watt at 1 meter (3. 28 ft) averaged (200 - 4, 000 Hz) of no less than 91 dB on axis maintaining an essentially flat frequency response with 3 dB-down points at 65 Hz and 16, 000 Hz in a two-cubic-foot sealed box in a free field. The half-space reference efficiency shall be 0. 8%. [. . . ] The loudspeaker shall be capable of handling a continuous 10-watt (8. 6 volts true RMS) shaped white-noise signal (as per EIA Standard RS-426A 1980) with a 6-dB crest factor for eight hours. The loudspeaker shall be the model 205-8A. When fitted with a transformer that allows connection to 25/70. 7/ 100-volt systems of 0. 5 to 4 watts, the loudspeaker shall be referred to as the model 205-4T. When fitted with a transformer that allows connection to 70. 7/100-volt systems of 1 to 8 watts, the loudspeaker shall be referred to as the model 205-8T. Specifications: Frequency Response: 90 - 18, 000 Hz, ±5 dB (see last page) Power-Handling Capacity: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 watts (per EIA RS-426-A 1980 (85 - 15, 000 Hz bandlimited pink noise, 6-dB crest factor): Impedance: Nominal: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ohms Minimum: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 7 ohms (230 Hz) Sound Pressure Level: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 dB (at 1 Meter, 1 Watt Input, 200 - 4, 000 Hz Average) Maximum SPL: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The 205-4T utilizes a 4-watt, 25/70. 7/ 100-volt universal line matching transformer with power taps ranging from 0. 50 to 4 watts. The 205-8T utilizes an 8-watt, 70. 7/100-volt universal line matching transformer with power taps ranging from 1 to 8 watts. The transformer is mounted to the frame and the primary winding is accessible for the user to select any of the power taps indicated in the following table for 205-4T. For use with 100-V lines, connect to the 70. 7 V primary winding, and use the table below to determine the wattage ratings of various secondary winding taps. All wattages marked for the various taps refer to the load on the amplifier, with the insertion loss of the transformer being less than 1. 0 dB. Recommended Enclosures and Baffles The 205-8A, 205-4T, and 205-8T are designed to fit on standard 4-inch ceiling speaker baffles. Additionally, these loudspeakers will accommodate the use of any standard back enclosure with a diameter of 5. 5 inches or greater and a depth of at least 4. 5 inches. Larger back volumes will increase the low-frequency output. The frequency response of a 205 in a typical 1. 0-cubic-foot and 1. 8-cubic-foot back enclosure are shown on the last page. Mounting The 205 may be front- or rear-mounted against either surface of its mounting flange and requires a 110 mm (4. 35 in. ) diameter cutout and a 120 mm (4. 72 in. ) bolt circle. Normal fasteners up to 5 mm (0. 20 in. ) will fit through the eight holes in the frame. [. . . ] The 205 is designed for mounting on standard ceiling speaker baffles. 205-4T 25V 4. 0W 2. 0W 1. 0W . 05W Common 8 Ohms Common Brown Red Orange Yellow Black White Black 70V Yellow Green Blue Violet Black White Black 100V Green Blue Violet N/A Black White Black 205-8T 70V 8. 0W 4. 0W 2. 0W 1. 0W Common 8 Ohms Common Brown Red Orange Yellow Black White Grey 100V Red Orange Yellow N/A Black White Grey Wiring Diagram Dimensions Polar Response in 1. 8 ft3 Sealed box 4 volt RMS of 1/3 octave Band Limited Noise in Anechoic Environment, 20 feet on Axis. Mounting Diagram Axial Frequency Response (1 watt / 1 meter) Input Impedance vs. Frequency Beamwidth vs Frequency Directivity and Q USA Canada Switzerland Germany France Australia Hong Kong Japan Singapore Mexico UK Africa, Mid-East Latin America 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043 705 Progress Avenue, Unit 46, Scarborough, Ontario, Canada, M1H2X1, Phone: 416-431-4975, 800-881-1685, FAX: 416-431-4588 Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: 41/32-331-6833. FAX: 41/32-331-1221 Hirschberger Ring 45, D94315, Straubing, Germany, Phone: 49 9421-706 392, FAX: 49 9421-706 287 Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: 33/1-6480-0090, FAX: 33/1-6480-4538 Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N. S. W. [. . . ]