Sx500+
400-Watt Two-Way Speaker System
•Ring-Mode Decoupling (RMDTM) Technology for increased intelligibility
•Durable structural-foam enclosure with integral handles and stand mount
•DL15Sx 15-inch woofer and DH2T compression driver for great sound and reliable performance
•Asymmetric constant-directivity 75° x 60° high-frequency horn
•Asymmetric horn-loaded woofer section
•400-watt long-term rms power capacity
•Molded-in attachment points for secure suspension with optional brackets
•Dual Neutrik Speakon® high-current connectors
•Biampable, passive network with PRO™ circuit for high-frequency driver protection
Description
The Electro-Voice Sx500+ is a 400-watt, 15-inch two-way, biampable, high-effi- ciency, constant-directivity speaker system featuring a vented-horn woofer section. Through extensive use of computer-aided design and modeling, Electro-Voice engi- neers have developed a state-of-the-art pro- fessional loudspeaker system.
The high-frequency section of the Sx500+ utilizes a molded-in 75° x 60° constant-di- rectivity horn which is aimed downward by 10°. This unique pattern contributes to high intelligibility and aims the speaker's output where it is most useful. Vocals sound natu- ral yet “cut through” in reverberant, noisy rooms. In addition, the coverage pattern is unusually uniform over its range of opera- tion. 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 Sx500+ is the cabinet. Constructed of high- impact polypropylene structural foam, it pro- vides a stiff and extremely durable enclosure.
The cabinet includes integral carrying handles and a stand socket for mounting on 1 3/8-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. The shaped plastic cabi- net, 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-band- width, titanium-diaphragm driver. This driver uses a unique, convex-drive Time Path™ phasing plug structure (U.S. Patent #4,525,604) for smooth and extended high- frequency performance. The voice coil is coupled to the diaphragm with EV’s exclu- sive Resonant Drive™ Technology. This in- creases and smooths the high-frequency re- sponse and reduces the amount of internal equalization required for flat frequency re- sponse, which extends to 16,000 Hz.
Aself-resetting high-frequency protection circuit, EV’s PRO™ circuit, is included with the Sx500+ to prevent against accidental overdrive and improve system reliability. If the input power to the high-frequency driver exceeds the nominal rating, the protection circuit is activated and reduces the power
delivered to the driver by 6 dB. The system will remain in this mode of operation until the input power is reduced to a safe level.
The bass section of the Sx500+ is a vented- horn design using Thiele-Small parameters for solid performance to 43 Hz. This horn provides directivity control for the woofer section and matches the asymmetry of the high-frequency section. The 381-mm (15-in.) DL15Sx woofer used is a specially designed unit featuring an extended-length voice coil and high-temperature construction materials. The system combines profes- sional-quality components, arranged in an unusually durable Thiele-Small-aligned vented enclosure. The result is clear and ar- ticulate, high-quality sound.
Ring-Mode Decoupling (RMDTM)
Technology
The Sx500+ controls both acoustical and me- chanical ring modes to provide dramatically increased intelligibility, using techniques learned from the development of the Electro- Voice X-Array™ concert speakers. There is much less coloration of the sound from reso- nating sources, leaving only the intended sound to be heard by the audience. The most obvious implementation of RMD™ on the Sx500+ is the foam attached to the back of
