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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
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-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 1
3
/
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 Path
TM
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
TM
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 PRO
TM
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 PROTEF
TM
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 (RMD
TM
)
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.
* Patent pending
S
x
00PI
S
x
00PIX
3
3
300-Watt Two-Way
Weather-Resistant
Speaker Systems
• Ring-Mode Decoupling (RMD
TM
) 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