SRM450v2
SRM450v2
PRECISION ACTIVE
LOUDSPEAKER
SRM450v2
The Mackie SRM450v2 is a full-range, portable, powered
loudspeaker system providing high-output, ultra-wide dispersion and low-distortion performance in a compact,
lightweight design. Two Fast Recovery™ amplifiers
independently power a 12-inch lightweight woofer and a
precision titanium compression driver. Mackie’s sophisticated Active electronics provide phase correction,
crossover, time correction, equalization and protection circuitry.
A heat-treated titanium compression driver with multi-cell
aperture directs pristine highs through an exponential highfrequency waveguide, allowing for ultra-wide dispersion.
This allows the SRM450v2 to deliver clear, smooth sound to
audience members up to 45° off axis.
The 12-inch lightweight woofer provides a greater magnetic
field with far less material, making the woofer extremely
lightweight without sacrificing performance. The 3-inch voice
coil allows the driver to run cooler, delivering consistent performance even after long hours of use.
Mackie-designed Active electronics provide equalization,
crossover, time alignment, and phase correction to enhance
sonic performance. Protective circuitry includes over-excursion protection, low-line voltage shut-down, thermal protection, level dependent low-frequency roll-off and
independent LF and HF limiters.
The SRM450v2 features a number of dedicated controls including a mic/line switch, a single microphone and line input
level control, and a contour switch for low-level sound reinforcement applications. There is also a timed turnoff feature
that turns off the amplifiers if the signal drops below –45 dBu
for three minutes.
The center of gravity, handle locations, handle design, position
of fly-points and ease of use have been ergonomically designed.
There is also an integrated pole mount cup and a weatherresistant steel grille. The asymmetrical trapezoidal cabinet has
been designed to provide an ideal floor monitoring position.
The cabinet is constructed of high-pressure injected polypropylene. The enclosure features ample amounts of reinforcement ribbing and structural strengthening resulting
in a strong, super-rigid design providing ideal acoustical characteristics.
FEATURES:
■ 2-way bi-amplified, optimized powered
loudspeaker system
■ 300W RMS Class-D, Fast Recovery™ LF amp / 100W RMS HF amp
■12" lightweight long-throw low-frequency transducer
with 3" voice coil and servo feedback control
■ High-output precision titanium compression driver
■ Ultra-wide, smooth dispersion via multi-cell horn
aperture and HF waveguide
■ Mackie Active electronic time alignment, phase
correction and EQ for studio quality sound
■ Built-in phase-accurate 24 dB Linkwitz-Riley
electronic crossover
■ Mic/line input and pass-thru connector
■ Lightweight for ultimate portability (40 lb / 18.1 kg)
■ Asymmetrical trapezoidal cabinet for floor monitor positioning
■ Stand / Pole-mountable
■ Flyable via ten M10 rigging points using the optional eyebolt kit
APPLICATIONS
Small to mid-size club/band PA systems, houses of worship,
DJs, vocal/band monitor wedges, gymnasiums, banquet
halls, conference rooms and many, many more.
1/6 PAGES
SRM450v2
PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 SPECIFICATIONS
Line Input Power
Acoustic Performance
Frequency Response (–3 dB)
55 Hz - 18 kHz
US, JP
100 - 120 VAC, 50 - 60 Hz
Frequency Range (–10 dB)
45 Hz - 20 kHz
EU, UK, AU
200 - 240 VAC, 50 - 60 Hz
Directivity Factor; Q (DI)
9.95 (9.98), averaged
2 kHz to 10 kHz
Max SPL long-term
124 dB @ 1 m
Max SPL peak
127 dB @ 1 m
Crossover Point
Linkwitz-Riley, 24 dB/octave @ 1600 Hz
Input / Thru Type
Balanced Differential
Input Impedance
20 k
Input Protection
RFI and level protected
Sensitivity
+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
Rated Power
300 watts rms*
Rated THD
< 0.1%
Cooling
Convection Extrusion
Class D, Parametric Servo Feedback
High-Frequency Power Amplifier
Rated Power
Rated THD
Cooling
Low-Line Voltage Shut Down
Driver Protection
60% Nominal line
Independent LF and HF compressors
Dynamic, signal-level dependent
Construction Features
Basic Design
Asymmetrical Trapezoidal
Enclosure Alignment
Sixth-Order
Material
Polypropylene
Finish
Black, textured finish
Grille
Display LEDs
One on each side, one on top
Perforated metal with weather-resistant coating
Signal Present, Peak, Power ON, and Thermal
Operating Temperature
–10ºC - 45ºC
14ºF - 113ºF
Physical Properties (packaged product)
16.8 in / 427 mm
< 0.1%
Depth
15.5 in / 394 mm
Shipping Weight
46.0 lb / 20.9 kg
12 in / 305 mm
Voice Coil Diameter
3 in / 76 mm
High-Frequency Transducer
1.75 in / 44 mm
Heat treated titanium
Horn Design
Vertical Coverage
Amplifier shutdown, auto-reset
26.5 in / 673 mm
Conventional Class AB
Diameter
Horizontal Coverage
Second-Order High-Pass Filter
Thermal Protection
Width
Low-Frequency Transducer
Throat Diameter
Over-Excursion Protection
Height
*Rated power is continuous rms wattage into transducer’s
rated impedance @ 5kHz for the HF amplifier and @ 500Hz
for the LF amplifier.
Mouth Size
Electronic Crossover, Phase Alignment, Equalization, Parametric EQ
100 watts rms*
Convection Extrusion
Design
Type
Control System Function
Handles
Low-Frequency Power Amplifier
Diaphragm Material
300 watts
Low-Freq Roll-Off
Line
Diaphragm Diameter
3-pin IEC 250 VAC
Power Consumption
Safety Features
Input / Output
Design
AC Connector
Physical Properties (product)
Height
26.1 in / 663 mm
Width
16.0 in / 406 mm
Depth
14.8 in / 376 mm
Net Weight
40.0 lb / 18.1 kg
Mounting Methods
Floor mount, pole mount, or fly via 10 integrated M10 threaded
inserts (two each located on each side, top, bottom and rear of
enclosure)
Options
PA-A1 Forged Shoulder Eyebolt Kit
Conical and Exponential
12 in / 305 mm (W) x 7 in / 178 mm (H)
1 in / 25 mm
90º (1 kHz - 20 kHz)
45º (2.8 kHz - 20 kHz)
SPM200 Loudspeaker Pole Mount
SRM450v2 Speaker Bag
P/N 0031943
P/N 2035170-01
P/N 0002843
Ordering Information
SRM450v2 12" 2-way Compact SR Loudspeaker, US
P/N 2033799-00
SRM450v2 12" 2-way Compact SR Loudspeaker, EU
P/N 2033799-01
SRM450v2 12" 2-way Compact SR Loudspeaker, JP
P/N 2033799-02
SRM450v2 12" 2-way Compact SR Loudspeaker, UK
P/N 2033799-03
SRM450v2 12" 2-way Compact SR Loudspeaker, AU
P/N 2033799-04
2/6 PAGES
SRM450v2
PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 HORIZONTAL POLARS
Gridlines: 6 dB axial / 15 degrees radial
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SRM450v2
PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 VERTICAL POLARS
Gridlines: 6 dB axial / 15 degrees radial
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SRM450v2
SRM450v2 FREQUENCY RESPONSE
PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 INPUT PANEL
0
Normalized to 0 dB SPL
1/3 OCTAVE RESPONSE
+10
–10
–20
–30
–40
–50
20
100
1000
10K
20K
Frequency (Hz)
SRM450v2 DIMENSIONS
2X M10
THREADED
MOUNTING
HOLE
5.46 [138.6 ]
4.54
[115.4 ]
7.75
[196.9 ]
2X 7.00
[177.8 ]
14.82
[376.4 ]
TOP
HANDLE
R 14.70
[373.4 ]
9.50 [241.3 ]
TOP
2X SIDE HANDLE
15.97
[405.6 ]
2X 5.10
[129.6 ]
2X M10
THREADED
MOUNTING
HOLE
26.09
[662.7 ]
12.88
[327.3 ]
2X 10.16
[257.9 ]
2X 6.66
[169.1 ]
DIMENSIONS APPLY
TO BOTH SIDES
0.25
[6.3 ]
GRILLE
PARTIALLY
SHOWN
FRONT
LEFT SIDE
RIGHT SIDE
9.50 [241.3 ]
0.3100 [7.874 ]
3X RUBBER FEET
DIMENSIONS APPLY
TO BOTH SIDES
POLE MOUNT
INPUT
2.66 [67.5 ]
4.96
[126.0 ]
7.20 [182.9 ]
BACK
1. SYMBOL
INDICATES CENTER OF BALANCE.
2. WEIGHT APPROX. 40.0 lb [18.1 kg].
3. SHIPPING WEIGHT APPROX. 46.0 lb [20.9 kg].
2X 11.61
[294.9 ] 3X 7.00
[177.8 ]
1.90
[48.3 ]
2X M10
THREADED
MOUNTING HOLE
(X.XX) = REF DIMS
BOTTOM
5/6 PAGES
SRM450v2
SRM450v2 BLOCK DIAGRAM
CONTOUR
HI-FREQUENCY
DRIVER
HI-PASS
HI-FREQ
2
1
LOUDSPEAKER
THRESHOLD
LOW CUT
J15
INPUT
PRECISION ACTIVE
HI-FREQ
AMP
3
TWEET
COMPRESSOR
2
THRU
1
3
THERMAL POWER
LED
LEDS
SIGNAL
LED
SIGNAL
SENSE
+15VDC
THERMAL
SWITCH
MUTE
MUTE
MUTE
ON/OFF
LOW AC
VOLTS SENSE CONTROL
PEAK
DETECTION
PEAK
LIGHT
TIMED
TURNOFF
OFF
SIGNAL
SENSE
LO-FREQUENCY
DRIVER
40-120 Hz DELAY LO-PASS COMPRESSOR
ON
176uS
SWEEPING
FILTER
POWER
FUSE SWITCH
SWITCHING
POWER
CONTROLLER
+
MID VDC
–
LO-FREQ
AMP
+
HI VDC
–
THRESHOLD
LPF
WOOF
THRESHOLD
BASS CONTROL SERVO LOOP
POWER
TRANSFORMER
+
LO VDC
–
SENSE
RESISTOR
MACKIE
SRM450v2
BLOCK DIAGRAM
05.16.08
SRM450v2 FLY POINTS
BACK
BOTH SIDES
RIGGING POINTS
Electronic files for this product are available at:
www.mackie.com
TOP
Pole
Mount
Specification Sheet
BOTTOM
Owner’s Manual
SRM450v2_SS.PDF
SRM450v2_OM.PDF
www.mackie.com
16220 Wood-Red Road NE
Woodinville, WA 98072 USA
800-898-3211, Fax 425-487-4337, sales@mackie.com
Since we are always striving to make our products better by incorporating new and improved materials, components, and manufacturing methods, we reserve the right to change these specifications at any time without notice. “Mackie” and the “Running
Man” figure 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.
Part No. SW0841 Rev. B 08/11
©2011 LOUD Technologies Inc. All Rights Reserved.
6/6 PAGES
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