17
SRM450v2 SPECIFICATIONS
Line Input Power
US
120 VAC, 60Hz
Recommended amperage service
2.5 amps
Europe
230 VAC, 50Hz
Recommended amperage service
1.25 amps
Japan
100 VAC, 50/60Hz
Recommended amperage service
3.0 amps
AC Connector
3-pin IEC 250 VAC
Control System Function
Electronic
Crossover
Phase
Alignment
Equalization
Parametric
Equalization
Safety Features
Over-Excursion Protection
Second-Order High-Pass Filter
Thermal Protection
Amplifier shutdown, auto-reset
Low-Line Voltage Shut Down
60%
Nominal
line
Driver Protection
Independent LF and HF compressors
Low-Freq Roll-Off
Dynamic, signal-level dependent
Construction Features
Basic Design
Asymmetrical Trapezoidal
Enclosure Alignment
Sixth-Order
Material
Polypropylene
Finish
Black textured finish
Handles
One on each side, one on top
Mounting Methods
Integrated mounting points, M10
Two
each
located
on each side, top, bottom, and
rear
of
enclosure
Grille
Perforated metal with weather-resistant coating
Display LEDs
Signal Present, Peak, Power ON, and Thermal
Physical Properties
Height
26.0 in / 660 mm
Width
15.4 in / 390 mm
Depth
14.8 in / 376 mm
Weight
40 lb / 18 kg
Options
PA-A1 forged shoulder eyebolt hardware (M10 x 1.5 mm x 20 mm)
SPM200 (Speaker Pole Mount)
Disclaimer
Since we are always striving to make our products better by incor-
porating new and improved materials, components, and manufacturing
methods, we reserve the right to change these specifications at any time
without notice.
“Mackie.,” the “Running Man” figure, and “FR Series” are registered
trademarks of LOUD Technologies Inc.
All other brand names mentioned are trademarks or registered
trademarks of their respective holders, and are hereby acknowledged.
©2003-2011 LOUD Technologies Inc.
All Rights Reserved.
System Specifications
Frequency Response (–3 dB)
55 Hz – 18 kHz
Frequency Range (–10 dB)
45 Hz – 20 kHz
Directivity Factor; Q (DI)
9.95 (9.98), averaged 2 kHz to 10 kHz
Max SPL Long-term @ 1m
124
dB
Max SPL Peak @ 1m
127
dB
Crossover
Linkwitz-Riley,
24 dB/octave @ 1600 Hz
Audio
Input
Type
Balanced
Differential
Input Impedance
20
kohms
Input Protection
RFI and level protected
Sensitivity
Line:
+4 dBu (center detent)
Mic:
–36
dBu
Maximum Input Level
+22 dBu
Low-Cut Frequency
75 Hz, Second-order filter
Acoustic Contour Equalization
Peaking:
+3 dB @ 100 Hz,
+3 dB @ 12 kHz
Operating Temperature Range
–10ºC to 45ºC (14ºF to 113ºF)
Power Amplifiers
Low-Frequency Power Amplifier
Rated Power
300
watts*
Rated THD
<
0.1%
Cooling
Convection
Extrusion
Design
Class D, Parametric Servo Feedback
High-Frequency Power Amplifier
Rated Power
100
watts*
Rated THD
< 0.1%
Cooling
Convection Extrusion
Design
Conventional Class AB
*Rated power is continuous rms wattage into transducer’s rated impedance @ 5 kHz
for the HF amplifier and @ 500 Hz for the LF amplifier.
Transducers
Low-Frequency Transducer
Diameter
12 in / 300 mm
Voice Coil Diameter
3.0 in / 75 mm
Sensitivity (1W@1m)
98
dB
Nominal Impedance
8
ohms
Power Handling
600 watts, program
Frequency Range
45 Hz – 3 kHz
High-Frequency Transducer
Diaphragm Diameter
1.75 in/44.5 mm
Diaphragm Material
Heat treated titanium
Sensitivity (1W@1m)
106
dB
Nominal Impedance
8
ohms
Power Handling
100 watts, program
Frequency Range
1 kHz – 20 kHz
Horn Design
Type
Conical and Exponential
Mouth Size
12 in/304.8 mm (W) x 7 in/177.8 mm (H)
Throat Diameter
1 in/25.4 mm
Horizontal Coverage
90º (1 kHz–20 kHz)
Vertical Coverage
45º (2.8 kHz–20 kHz)
