User manual ELECTRO-VOICE AP3200

[. . . ] This driver uses a unique, convex-drive Time PathTM phasing plug structure (U. S. Patent #4, 525, 604) for smooth and extended highfrequency performance. The voice coil is coupled to the diaphragm with EV's exclusive Resonant DriveTM Technology. This increases and smooths the high-frequency response and reduces the amount of internal equalization required for flat frequency response, which extends to 20, 000 Hz. [. . . ] Response within the 90° x 65° rated coverage angle is uniform, which means dependable audience coverage without "hot spots" or dead zones at certain frequencies. The 90° x 65° dispersion characteristic also helps avoid early reflections from nearby floor or side-wall surfaces which could degrade performance. The controlled directivity of the high- and low-frequency transducers also eliminates response irregularities caused by diffraction off nearby enclosure edges and, in combination with an essentially flat on-axis frequency response, produces a total acoustic power output that is uniform with frequency. Directivity A unique feature of the Sx80T is the constant-directivity dispersion provided by the 90° x 65° horn. The polar response of the system at selected one-third-octave bandwidths is shown in Figure 2. These polar responses were measured in a full-space anechoic environment at 6. 1 meters (20 feet) using one-third-octave pink-noise inputs. The frequencies selected are fully representative of the polar response of the system. Beamwidth of the system utilizing the complete one-third-octave polar data is shown in Figure 3. Directivity factor, RQ, and directivity index, Di, are plotted in Figure 4. Power-Handling Capacity Electro-Voice components and systems are manufactured to exacting standards, ensuring they will hold up, not only through the most rigorous of power tests, but also through continued use in arduous, real-life conditions. The EIA Loudspeaker Power Rating Full Range (ANSI/EIA RS-426-A 1980) uses a noise spectrum which mimics typical music and tests the thermal and mechanical capabilities of the components. Constant-Directivity Speaker System The crossover frequency and speaker component geometries have been selected so that the directional characteristics of the woofer Suspending Sx80T Enclosures WARNING: Suspending any object is potentially dangerous and should be attempted only by individuals who have a thorough knowledge of the techniques and regulations of rigging objects overhead. Electro-Voice strongly recommends that the Sx80T be suspended taking into account all current na- 2 Sx80T T wo-Way Speaker System With Transformer tional, federal, state, and local regulations. It is the responsibility of the installer to ensure the Sx80T is safely installed in accordance with all such regulations. If the Sx80T is suspended, Electro-Voice strongly recommends that the system be inspected at least once a year. If any sign of weakness or damage is detected, remedial action should be taken immediately. The Sx80T enclosure contains seven M6 inserts and (see Figure 6) which are built into the enclosure for the purpose of suspension. These inserts can be used with either the Sx80MB mounting bracket from ElectroVoice, or with an OmniMount® Series 75 mounting system. Sx80MB The Sx80MB is a universal U-bracket designed to allow the suspension of the Sx80T at any angle and orientation from the wall or ceiling (See Figures 6 and 8). It uses M6 inserts on the top and the bottom of the enclosure. There is an extra M6 insert on the top of the enclosure for a safety chain. Full instructions are included in the Sx80MB engineering data sheet. [. . . ] The system will use a passive crossover-equalize network with protection for the high-frequency driver. The loudspeaker shall meet the following performance criteria: frequency response of 65 to 20, 000 Hz, -3 dB; maximum power handling of 60 watts long term and 240 watts short term with switch selectable taps for 60 W, 30 W, 15 W, 7. 5 W, 3. 7 W and 1. 8 W, with a shaped randomnoise input per ANSI/EIA RS-426-A 1980; sensitivity of 92 dB SPL at 1 meter with a 1watt, 300-2, 000-Hz pink-noise input; 6-dBdown horizontal coverage angle of 90° + 34°/ -27° in the 2, 000- to 20, 000-Hz range; 6-dBdown vertical coverage angle of 65° + 31°/4° in the 2, 000- to 20, 000-Hz range; crossover frequency of 2, 200 Hz; nominal impedance of 8 ohms and minimum impedance of 7. 2 ohms. The enclosure shall be constructed of high-impact polystyrene and fitted with a powder-coated steel grille, and M6 and M5 threaded inserts for optional accessories. Dimensions shall be 400 mm (15. 75 in. ) high x 292 mm (11. 5 in. ) wide x 240 mm (9. 45 in. ) deep. [. . . ]