Sx 3 00PI
Sx 300PIX
300-Watt Two-Way Weather-Resistant
Speaker Systems
•Ring-Mode Decoupling (RMDTM) for increased intelligibility
•Lightweight Structural-foam enclosure
•Stand mountable and arrayable
•High efficiency (99 dB, 1 W/1 m)
•High power handling (Sx300PI: 300-watts continuous, 1,200-watts short term)
•Powder-coated, full-face stainless-steel grill with foam backing
•Four molded-in attachment points (metric M8 x 1.25) for secure suspension
•100-watt transformer option (Sx300PIX)
•Available in white
Description
The Sx300PI and Sx300PIX are continua- tions of the popular the Sx-series offering the added value of weather-resistant cabi- nets. The Electro-Voice Sx300PI is a 300-watt, 12-inch, two-way, high-efficiency, constant- directivity speaker system for permanent in- stallation. Through the extensive use of computer-aided design and modeling, Electro-Voice engineers have developed
astate-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-di- rectivity horn. This unique pattern contrib- utes to high intelligibility. Vocals sound natural, yet “cut through” in reverberant, noisy rooms. In addition, the coverage pat- tern 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 cov- erage angle. The horn’s unique, Varipath TM throat geometry* helps direct driver output to the corners of the room, points of cover- age 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 high- impact polypropylene structural foam, it pro- vides a stiff and extremely durable enclosure. Molded into the cabinet are an integral carry- ing 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 combina- tion 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-inch- throat, wide bandwidth, titanium-diaphragm driver. The DH2010A uses a unique, convex- drive 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 exclu- sive Resonant DriveTM technology. This in- creases and smooths the high-frequency re- sponse and reduces the amount of internal equalization required for flat frequency re- sponse. Driver output extends to 25,000 Hz.
A self-resetting, high-frequency protection cir- cuit, EV’s PROTM circuit, is included with the Sx300PI to prevent accidental overdrive and improve system reliability. If the input power
to the high-frequency driver exceeds the nomi- nal 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 Sx300PI is designed using Thiele-Small parameters for efficient performance to below 80 Hz. The woofer is a DL12Sx 12-inch unit featuring beryllium cop- per lead wires, a low-mass, edge-wound voice coil and high-temperature materials. The part of the magnetic structure adjacent to the coil is insulated using the exclusive EV PROTEFTM process (U.S. Patent #4,547,632). The sys- tem combines professional-quality compo- nents, arranged in a time-coherent vertical ar- ray, with an unusually durable Thiele-Small- aligned vented enclosure. The result is clear and articulate, high-quality sound.
Ring-Mode Decoupling (RMDTM)
The Sx300PI controls both acoustical and mechanical ring modes to provide dramati- cally increased intelligibility, using tech- niques learned from the development of the Electro-Voice X-array™ concert speakers.
There is much less coloration of the sound from resonating sources, leaving only the intended sound to be heard by the audience.
