Description
The Electro-Voice Sx80 is a compact, two-
way, high-efficiency, constant-directivity
speaker system for sound reinforcement and
monitoring. The small size, high sensitivity
and high power-handling capacity of
the Sx80 make it an excellent choice for use
in studios, clubs, bars, theaters or other
applications.
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 Sx80 uti-
lizes a molded-in 90° x 65° constant-direc-
tivity horn. This unique pattern contributes
to high intelligibility and aims the speakers
output where it is most useful. Vocals sound
natural yet "cut through" in reverberant,
noisy rooms. In addition, the coverage pat-
tern is unusually uniform over it range of
operation. The horn's unique, VariPath
TM
throat geometry helps direct driver output to
the corners of the room, to points of cover-
age 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
Sx80 is the cabinet. Constructed of high-
impact polystyrene it provides a stiff and
extremely durable enclosure. The cabinet
includes threaded inserts for the optional
Sx80MB U-bracket
. It also has inserts for
installing with an OmniMount® Series 75
mounting system.
The Sx80’s high-frequency horn is driven by
the DH2005 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 20,000 Hz.
A self-resetting high-frequency protection
circuit, EV’s PRO™ circuit, is included with
the Sx80 to prevent against accidental over-
drive 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 low-frequency section of the Sx80 is a
203-mm (8-in.) direct radiating woofer in-
stalled in an optimally-vented enclosure.
This results in exceptionally extended bass
response and high efficiency in a very small
cabinet.
Ring-Mode Decoupling (RMD
™
)
Technology
The Sx80 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 resonating sources, leaving only the in-
tended sound to be heard by the audience.
High-Frequency Protection Circuit
The Sx80 crossover includes the Electro-
Voice automatically resetting PRO™
circuit
for high-frequency driver protection. This
circuit permits short-term transients to pass,
but protects the tweeter from long-term
power extremes that would normally destroy
the tweeter.
Sx80
175-Watt Two-Way
Speaker System
• 8-inch woofer and DH2005 compres-
sion driver for great sound and
reliable performance
• Constant-directivity 90° x 65° high-
frequency horn with VariPath
™
geometry for uniform coverage
• Ring-Mode Decoupling (RMD
™
) for
increased intelligibility
• 175-watt long-term rms power
capacity
• Molded-in attachment points allow for
use with brackets
• Available in paintable black (Sx80B) or
white (Sx80W)
