User manual ELECTRO-VOICE SX80BE EDS

[. . . ] It also has inserts for installing with an OmniMount® Series 75 mounting system. The Sx80's high-frequency horn is driven by the DH2005 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. [. . . ] 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 Sx80 is the constantdirectivity 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. 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 Sx80 passes ANSI/EIA RS-426-A 1980 with the following values: RSR = 6. 21 ohms (1. 15 x RE) RE = woofer DCR = 5. 4 PE(MAX) = 175 watts Test voltage = 32. 97 volts rms, 65. 93 volts peak (+6dB) The "peak" power-handling capacity of a woofer is determined by the peak test voltage amount. For the Sx80, a 65. 93-volt peak test voltage translates into 700-watts shortterm 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 Sx80 has a random-noise power capacity of 175 watts long term (700 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 Sx80 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. 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 2 Sx80 175-Watt Two-Way Speaker System Sx80 175-Watt T wo-Way Speaker System 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. To be very conservative, one can use an amplifier rated at 0. 5 to 0. 7 times the longterm average noise power rating of the loudspeaker. [. . . ] Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or workmanship for a period of three (3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty statement. For warranty repair, service information, or a listing of the repair facilities nearest you, contact the service repair department at: 800/685-2606 or 501/354-0111 For technical assistance, contact Technical Support at 866/78AUDIO. Central Standard time. Sx80 175-Watt Two-Way Speaker System Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only remedies provided to the customer. [. . . ]