User manual ELECTRO-VOICE SX500PI+ EDS

[. . . ] The horn's unique, VariPath TM throat geometry helps direct driver output to the corners of the room, to points of coverage not described in the usual specifications of horizontal and vertical coverage angles, and to parts of the audience that typically do not receive the strongest coverage. One of the many other unique features of the Sx500PI+ is the cabinet. Constructed of highimpact polypropylene structural foam, it provides a stiff and extremely durable enclosure. The cabinet includes integral carrying handles and a stand socket for mounting on 13/8-inch stands such as the Electro-Voice 100BK. Rubber feet that are attached to the bottom of the cabinet and mating sockets that are molded into the top provide a means of stacking systems. [. . . ] Constant-Directivity Speaker System The crossover frequency and speaker- component geometries have been selected so that the directional characteristics of the woofer and constant-directivity high-frequency horn match at the crossover frequency to create a special system type -- the constant-directivity system. At higher frequencies, the horizontal coverage pattern remains constant and the vertical pattern smoothly transitions to a 60° angle above 5, 000 Hz. Response within the 75° x 60° rated coverage angle is uniform, which means dependable audience coverage without "hot spots" or dead zones at certain frequencies. The 75° x 60° dispersion characteristic also helps avoid early reflections from nearby floor or side-wall surfaces which could degrade performance. The controlled directivity of the highand 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 Sx500PI+ is the constant-directivity dispersion provided by the 75° x 60° horn. The polar response of the system at selected one-third-octave bandwidths is shown in Figure 2. These polar responses were measured in an anechoic environment at 6. 1 meters (20 feet) using one-third-octave pinknoise 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, R , and directivity index, Di, are plotted in Figure 4. Power-Handling Capacity The Sx500PI+ is shipped in full-range mode using an internal crossover. In biamp mode, the long-term average power-handling capacity is as follows: Low Frequency: 400 watts High Frequency: 60 watts 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. Electro-Voice will support relevant additional standards as and when they become available. Extreme, in-house power tests, which push the performance boundaries of the woofers, are also performed and passed to ensure years of trouble-free service. Specifically, the Sx500PI+ passes ANSI/EIA RS-426-A 1980 with the following values: R = 5. 76 ohms (1. 15 x (RE + 1. 86)) RE = woofer DCR 1. 86 =horn-load impedance correction PE(MAX) = 400 watts Test voltage = 48. 00 volts rms, 96. 00 volts peak (+6 dB) The "peak" power-handling capacity of a woofer is determined by the peak test-voltage amount. For the Sx500PI+, a 96. 00-volt peak test-voltage translates into 1, 600-watts shortterm peak power-handling capacity. This is the equivalent of four times the "average" powerhandling capacity, and is a peak that can be sustained for only a few milliseconds. However, this sort of short duration peak is very typical in speech and music. Provided the amplifier can reproduce the signal accurately without clipping, the woofer will also perform accurately and reliably, even at these levels. Amplifier Power Recommendations As noted in the Power-Handling Capacity section above, the Sx500PI+ has a random-noise power capacity of 400-watts long term (1, 600- watts peak) per ANSI/EIA RS-426-A 1980. [. . . ] Electro-Voice Speakers and Speaker Systems are guaranteed against malfunction due to defects in materials or workmanship for a period of five (5) years from the date of original purchase. The Limited Warranty does not apply to burned voice coils or malfunctions such as cone and/or coil damage resulting from improperly designed enclosures. Electro-Voice active electronics associated with the speaker systems are guaranteed for three (3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty statement. [. . . ]