10
Architects and Engineers’ Specifications
Thermal protection shall be provided by
a thermal sensor mounted on the heatsink,
which monitors the heatsink temperature
and triggers the thermal protection circuit
should the temperature exceed 140º F
(60º C). The thermal LED shall light and
the input signal shall be muted until the
heatsink cools to a safe operating level, at
which point the thermal protection circuit
auto-resets and normal operation resumes.
Overload protection shall be provided by
a limiter circuit, which monitors the low-
frequency amplifier output and reduces the
input level to the amplifier should the am-
plifier output begin to clip.
The loudspeaker enclosure shall have a
trapezoidal shape and shall incorporate two
side handles and a top and bottom relocation
handle. The enclosure shall be constructed
of a combination multi-ply wood and high-
pressure injected structural resin, with a black
PVC vinyl finish. The front of the loudspeaker
shall be covered with a powder coated,
weather-resistant perforated steel grille.
The active two-way full-range loudspeaker
system shall be a Mackie SA1521.
Dimensions
32.0 in/
81.3 cm
13.9 in/
35.3 cm
18.1 in/
46.0 cm
19.1 in/
48.5 cm
19.1 in/
48.5 cm
WARNING:
THIS SURFACE MAY REACH HIGH TEMPERATURE DURING
STANDARD USE. TO ENSURE PROPER OPERATION ALLOW A MINIMUM OF 6 INS.
OF CLEARANCE FROM THIS SURFACE AND ADEQUATE VENTILATION. TO REDUCE
THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THIS PANEL OR ANY ATTACHED
COMPONENT. NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
REPLACE WITH THE SAME TYPE FUSE AND RATING.
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE
UTILISE UN FUSIBLE DE RECHANGE DE MÊME TYPE.
DEBRANCHER AVANT DE REMPLACER LE FUSIBLE
CAUTION
AVIS:
RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR
SERIAL NUMBER
MANUFACTURING DATE
ON
POWER
115V AC FUSE AC125V-T6.3A
POWER
THERMAL
SIGNAL
LIMIT
LOOP OUT
MAIN INPUT
PARALLEL
0dB
-15
+5
SA1521
CONCEIVED AND DESIGNED BY MACKIE DESIGNS INC, WOODINVILLE, WA, USA
AND MACKIE EUROPE • COPYRIGHT ©2001 •
THE FOLLOWING ARE TRADEMARKS OR REGISTERED TRADEMARKS OF MACKIE DESIGNS INC.:
"MACKIE", AND THE "RUNNING MAN" FIGURE • PATENT PENDING
ACTIVE SOUND REINFORCEMENT
SPEAKER SYSTEM
FREQUENCY RESPONSE GRAPH
The active two-way, full-range loudspeaker
system shall incorporate one 15-inch
low-frequency (LF) transducer and a 1-inch
exit compression driver high-frequency
(HF) transducer. The LF driver shall be
mounted in a vented enclosure tuned for
optimum low-frequency response. The HF
transducer shall be loaded on a symmetrical
constant directivity horn.
The system shall have a nominal coverage
pattern of 75
°
(horizontal) x 65
°
(vertical).
System frequency response shall vary no
more than
±
3 dB from 57Hz to 18kHz
measured on axis. The loudspeaker shall in-
corporate a Class G low-frequency amplifier
capable of delivering 400 watts RMS over a
frequency range of 20Hz–1300Hz. The sys-
tem shall incorporate a Class AB 100 watt
RMS amplifier specifically designed to power
the HF driver over the range of 1300Hz –
20kHz. The amplifiers shall be mounted on
an aluminum heatsink, which shall be
mounted on the rear of the speaker system,
and shall be convection cooled.
