User manual ELECTRO-VOICE SX500+ EDS

[. . . ] The shaped plastic cabinet, in combination with the uniform, 75° x 60° directivity characteristics, make the Sx500+ ideal for use alone or in arrays. The Sx500+'s high-frequency horn is driven by the DH2T one-inch throat, wide-bandwidth, titanium-diaphragm driver. This driver uses a unique, convex-drive Time PathTM phasing plug structure (U. S. Patent #4, 525, 604) for smooth and extended highfrequency performance. [. . . ] Directivity A unique feature of the Sx500+ 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 onethird-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-thirdoctave polar data is shown in Figure 3. Directivity factor, R , and directivity index, Di, are plotted in Figure 4. Power-Handling Capacity The Sx500+ 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 Sx500+ 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 Sx500+, a 96. 00-volt peak test-voltage translates into 1, 600-watts short-term peak power-handling capacity. This is the equivalent of four times the "average" power-handling 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 Sx500+ has a random-noise power Sx500+ 400-Watt Two-Way Speaker System Sx500+ 400-Watt T wo-Way Speaker System capacity of 400-watts long term (1, 600- watts peak) per ANSI/EIA RS-426-A 1980. The following guidelines will help relate this to an appropriate power amplifier output rating. To use the Sx500+ to full capacity, skilled experts in sound-system installation and operation will obtain the best results if the power amplifier is 2. 0 to 4. 0 times the long-term average noise- power rating of the speaker system. For the Sx500+, this is 800 to 1, 600 watts. The caution cannot be made strongly enough, however, that this arrangement is only for experts or those who can discipline themselves against "pushing" the system for ever-higher sound levels and who can avoid "accidents" such as catastrophic feedback or dropped microphones. A more conservative, "normal" amplifier size, which will produce audible results nearly equal to those of the "expert" recommendation, is 1. 0 to 1. 4 times the longterm average noise-power rating of the speaker. For the Sx500+, this is 400 to 640 watts. [. . . ] 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. [. . . ]