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1. To use the Sx500PI+ to full capacity, skilled
experts in sound-system installation and op-
eration will obtain the best results if the
power amplifier is 2.0 to 4.0 times the long-
term average noise- power rating of the
speaker system. For the Sx500PI+, this is
800 to 1,600 watts.
The caution cannot be made strongly
enough, however, that this arrangement is
only for experts or those who can discipline
themselves against "pushing" the system for
ever-higher sound levels and who can avoid
"accidents" such as catastrophic feedback
or dropped microphones.
2. A more conservative, "normal" amplifier
size, which will produce audible results
nearly equal to those of the "expert" rec-
ommendation, is 1.0 to 1.4 times the long-
term average noise-power rating of the
speaker. For the Sx500PI+, this is 400 to
640 watts.
3. To be very conservative, one can use an
amplifier rated at 0.5 to 0.7 times the long-
term average noise-power rating of the
speaker. For the Sx500PI+, this is 200 to
280 watts.
Request P.A. Bible Addition No. Two ("Power
Handling Capacity") for more background on
these recommendations.
Service
In the unlikely event the Sx500PI+ requires ser-
vice, the woofer can be removed from the front.
The high-frequency driver can be removed
from the rear by first removing the input panel.
A service data sheet is available from Electro-
Voice.
Stand Mounting
When used on a stand, the stand must be placed
on a stable surface. The stand must be rated to
support systems of 38.6 kg (85 lb) or greater.
It must have a base diameter of 1.22 m (4 ft) or
greater. The bottom of the speaker should be
no higher than 1.52 m (5 ft) from the bottom of
the stand. The user must be sure that safe use
on a stand is not affected by wind or any other
conditions.
The Sx500PI+ can be mounted on the 100BK
speaker stand or any other stand with a
1
/
inch diameter shaft.
3
8-
Suspending Sx500PI+ Enclosures
WARNING: Suspending any object is
3
potentially dangerous and should be
attempted only by individuals who have a
thorough knowledge of the techniques and
regulations of rigging objects overhead.
Electro-Voice strongly recommends that the
Sx500PI+ be suspended taking into account
all current national, federal, state and local
regulations. It is the responsi-bility of the
installer to ensure the Sx500PI+ is safely
installed in accordance with all such
regulations. If the Sx500PI+ is suspended,
Electro-Voice strongly recommends that the
system be inspected at least once a year. If
any sign of weakness or damage is detected,
remedial
action
should
immediately.
The Sx500PI+ enclosure contains eight
M8 x 1.25 inserts (see Figure 7) which are built
into the enclosure for the purpose of suspen-
sion. Before the enclosure is suspended, these
inserts are used to attach plates that hold the
two halves of the enclosure together in addi-
tion to providing a way to suspend the enclo-
sure.
The suspension kits that are available for the
Sx500PI+ are listed below. Please refer to in-
dividual suspension-kit engineering data sheets
for full details and safety information.
The first approach is to suspend individual
Sx500PI+ enclosures. The Mb700 forged eye-
bolt attachment kit (see Figure 9) is an eyebolt
suspension kit. It includes a top and bottom
mounting plate to secure the two halves of the
enclosure, in addition to the necessary hard-
ware. Typically it will be necessary to attach
two cables to the top eyebolts and to "pull-up"
on the bottom plate. The Mb500 wall/ceiling
mounting bracket (see Figure 8) encompasses
the top and bottom of the enclosure with a
bracket attached to the two plates to secure the
halves of the enclosure. Additionally, it has fea-
tures to make suspending the Sx500PI+ easier
and more flexible. Electro-Voice recommends
the use of the Mb500 in all but the simplest
situations. The Mb500 has supplementary holes
to allow the Sx500PI+ to be attached to a wall
or ceiling and aimed at an audience.
The second approach is to suspend multiple
Sx500PI+ enclosures. The Sx500PI+ enclosure
is not designed to suspend multiple enclosures
from itself. If an "array" is required, then mul-
tiple Mb500's must be used. Arrays may be
constructed vertically by "daisy chaining" two
Mb500's from each other. The Mb600 horizon-
tal array kit allows the easy and secure con-
struction of horizontal arrays, using Mb500's
to support the enclosure.
Weather-Resistant Mounting
When mounting the Sx500PI+ in a location
where a weather-resistant system is required,
a minimum of a five-degree down angle is rec-
ommended. (See Figure 10.) This will help
prevent any moisture from wicking through the
foam and mesh-backed grille and accumulat-
ing inside the enclosure under extreme weather
conditions.
Architects' and Engineers' Specifications
The loudspeaker shall be a compact vented-
be
taken
box type. The low frequencies shall be repro-
duced with one horn-loaded DL15Sx-W
381-mm (15-in.) woofer. The high frequencies
shall be reproduced by a DH2T, high-frequency
compression driver with a pure-titanium dia-
phragm, coupled to a 75° x 60° constant-direc-
tivity horn molded into the front baffle of the
enclosure. The system will use a passive cross-
over-equalizer network with protection for the
high-frequency driver. The loudspeaker shall
meet the following performance criteria: fre-
quency response of 66-16,000 Hz, –3 dB;
power handling of 400-watts long term and
1,600-watts short term, with a shaped random-
noise input per ANSI/EIA RS-426-A 1980;
sensitivity of 100-dB SPL at 1 meter with a 1-
watt, 300-2,000-Hz pink-noise input; 6dB-
down horizontal coverage angle of 75° + 14°/
– 20° in the 2,000- to 16,000-Hz range; 6-dB-
down vertical coverage angle of 60°
– 8° in the 2,000- to 16,000-Hz range; cross-
over frequency of 1,600 Hz; nominal imped-
ance of 8 ohms and minimum impedance of
5.2 ohms in full-range mode. Paralleled input
and output connectors shall be present, con-
sisting of Neutrik Speakon
tors. The enclosure shall be constructed of
polypropylene structural foam and fitted with
a powder-coated full-face stainless-steel grille
with foam backing and a polyester mesh water
shield, three integral handles, a stand socket
for mounting on 1
and mating sockets to facilitate stacking. Di-
mensions shall be 838 mm (33 in.) high x 673
mm (26.5 in.) wide x 448 mm (17.63 in.) deep.
Net weight shall be 32.9 kg (72.5 lb).
The system shall be capable of producing av-
erage sound levels in excess of 126 dB in the
long term, and short-term peaks of 132 dB.
The loudspeaker system shall be the
Electro-Voice Sx500PI+.
+11°/
®
NL4MP connec-
3
/
-inch stands, rubber feet
8
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