Electrovoice sx80 Mode D'Emploi

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.

™

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.

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.