The Sx300PI and Sx300PIX are continuations of the popular the Sx series offering the added value of weather-resistant cabinets. The Electro-Voice Sx300PI is a 300-watt, 12-inch, two-way, high-efficiency, constantdirectivity speaker system for permanent installation. Through the extensive use of computer-aided design and modeling, Electro-Voice engineers have developed a state-of-the-art professional loudspeaker system for permanent installation where weather resistance is needed. The Sx300PIX is the same as the Sx300PI with the addition of an AT100 transformer.
The high-frequency section of the Sx300PI utilizes a molded-in, 65° x 65° constant-directivity horn. This unique pattern contributes to high intelligibility. Vocals sound natural, yet "cut through" in reverberant, noisy rooms. In addition, the coverage pattern is unusually uniform over its range of operation. Sound quality off axis is very consistent, even at 45° off axis (a 90° total coverage angle), well beyond the rated coverage
angle. The horn's unique, VaripathTM throat geometry* helps direct driver output to the corners of the room, points of coverage not described in the usual specifications of horizontal and vertical coverage angles, and parts of the audience that typically do not receive the strongest coverage.
One of the many other unique features of the Sx300PI is the cabinet. Constructed of highimpact polypropylene structural foam, it provides
a stiff and extremely durable enclosure. Molded into the cabinet are an integral carrying handle and a stand socket for mounting on 13/8-inch stands such as the Electro-Voice 100BK. Rubber feet attached to the bottom of the cabinet and mating sockets molded into the top provide a means of stacking systems. The trapezoidal-shaped cabinet in combination with the uniform, 65° x 65° directivity characteristics, make the Sx300PI ideal for use alone or in arrays.
The Sx300PI's high-frequency horn is driven by the Electro Voice DH2010A one-inchthroat, wide bandwidth, titanium-diaphragm driver. The DH2010A uses a unique, convexdrive Time PathTM 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 exclusive Resonant DriveTM technology. This increases and smooths the high-frequency response and reduces the amount of internal equalization required for flat frequency response. Driver output extends to 25,000 Hz. A self-resetting, high-frequency protection circuit,
EV's PROTM circuit, is included with the Sx300PI to prevent accidental overdrive and improve system reliability.