User manual ELECTRO-VOICE APX2 DATASHEET

[. . . ] Vocals sound natural yet "cut through" in reverberant, noisy rooms. In addition, the coverage pattern is unusually uniform over its range of operation. The horn's unique, VariPathTM 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 Sx500+ is the cabinet. [. . . ] In the full-range mode, as supplied by the factory, pins 1+ and 1­ are the inputs to the system. Another system can be connected in parallel 2 by using the other connector. Care must be taken not to abuse the amplifier by connecting impedances which are too low. The user may put the system in biamp mode by removing the input panel and moving a connector from the full-range mode to biamp mode, as noted on the crossover. In biamp mode, 1+, 1­ are the LF inputs and 2+, 2­ are the HF inputs. 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 high- and lowfrequency 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 Sx500+ is the constant-directivity dispersion provided by the 75° x 60° horn. For the Sx500+, this is 200 to 280 watts. Two ("Power Handling Capacity") for more background on these recommendations. Service In the unlikely event the Sx500+ requires service, the woofer can be removed from the front. The high-frequency driver can be removed from the rear by first removing the input panel. A service data sheet is available from Electro-Voice. Stand Mounting When used on a stand, the stand must be placed on a stable surface. The stand must be rated to support systems of 38. 6 kg (85 lb) or greater. It must have a base diameter of 1. 22 m (4 ft) or greater. The bottom of the speaker should be no higher than 1. 52 m (5 ft) from the bottom of the stand. The user 3 must be sure that safe use on a stand is not affected by wind or any other conditions. The Sx500+ can be mounted on the 100BK speaker stand or any other stand with a 1 3/8-inch diameter shaft. [. . . ] It includes a top and bottom mounting plate to secure the two halves of the enclosure, in addition to the necessary hardware. Typically it will be necessary to attach two cables to the top eyebolts and to "pull-up" on the bottom plate. The Mb500 wall/ceiling mounting bracket (see Figure 8) encompasses the top and bottom of the enclosure with a bracket attached to the two plates to secure the halves of the enclosure. Additionally, it has features to make suspending the Sx500+ easier and more flexible. [. . . ]