Mackie SRM450v2 User manual

1/6 PAGES
SRM450v2 PRECISION ACTIVE
LOUDSPEAKER
FEATURES:
■2-way bi-amplified, optimized powered
loudspeaker system
■300W RMS Class-D, Fast Recovery™LF amp /
100W RMS HF amp
■12” neodymium 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
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 neodymium 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 high-
frequency 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 neodymium 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
includ ing 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 weather-
resis tant 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.
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.

2/6 PAGES
SRM450v2 PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 SPECIFICATIONS
Acoustic Performance
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 124 dB @ 1 m
Max SPL peak 127 dB @ 1 m
Crossover Point Linkwitz-Riley, 24 dB/octave @ 1600 Hz
Input / Output
Input / Thru Type Balanced Differential
Input Impedance 20 k
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
Low-Frequency Power Amplier
Rated Power 300 watts rms*
Rated THD < 0.1%
Cooling Convection Extrusion
Design Class D, Parametric Servo Feedback
High-Frequency Power Amplier
Rated Power 100 watts rms*
Rated THD < 0.1%
Cooling Convection Extrusion
Design Conventional Class AB
*Rated power is continuous rms wattage into transducer’s
rated impedance @ 5kHz for the HF amplifier and @ 500Hz
for the LF amplifier.
Low-Frequency Transducer
Diameter 12 in / 305 mm
Voice Coil Diameter 3 in / 76 mm
Magnet Material Neodymium
High-Frequency Transducer
Diaphragm Diameter 1.75 in / 44 mm
Diaphragm Material Heat treated titanium
Horn Design
Type Conical and Exponential
Mouth Size 12 in / 305 mm (W) x 7 in / 178 mm (H)
Throat Diameter 1 in / 25 mm
Horizontal Coverage 90º (1 kHz - 20 kHz)
Vertical Coverage 45º (2.8 kHz - 20 kHz)
Line Input Power
US, JP 100 - 120 VAC, 50 - 60 Hz
EU, UK, AU, CN 200 - 240 VAC, 50 - 60 Hz
AC Connector 3-pin IEC 250 VAC
Power Consumption 300 watts
Control System Function
Electronic Crossover, Phase Alignment, Equalization, Parametric EQ
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
Grille Perforated metal with weather-resistant coating
Display LEDs Signal Present, Peak, Power ON, and Thermal
Operating Temperature –10ºC - 45ºC
14ºF - 113ºF
Physical Properties (packaged product)
Height 26.5 in / 673 mm
Width 16.8 in / 427 mm
Depth 15.5 in / 394 mm
Shipping Weight 46.0 lb / 20.9 kg
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 P/N 0031943
SPM200 Loudspeaker Pole Mount P/N 2035170-01
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
SRM450v2 12”2-way Compact SR Loudspeaker, CN P/N 2033799-05

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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

5/6 PAGES
TOP
LEFT SIDE
FRONT RIGHT SIDE
BOTTOM
BACK
(X.XX) = REF DIMS
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].
7.75
196.9[ ]
4.54
115.4[ ]
2X 7.00
177.8[ ]
5.46 138.6[ ]
2X M10
THREADED
MOUNTING
HOLE
9.50 241.3[ ]
14.82
376.4[ ]
R 14.70
373.4[ ]
TOP
HANDLE
2X 5.10
129.6[ ]
2X 10.16
257.9[ ]
2X 6.66
169.1[ ]
2X SIDE HANDLE
DIMENSIONS APPLY
TO BOTH SIDES
0.25
6.3[ ]
12.88
327.3[ ]
26.09
662.7[ ]
15.97
405.6[ ]
GRILLE
PARTIALLY
SHOWN
DIMENSIONS APPLY
TO BOTH SIDES
2X M10
THREADED
MOUNTING
HOLE
4.96
126.0[ ]
2.66 67.5[ ]
7.20 182.9[ ]
INPUT
3X 7.00
177.8[ ]
1.90
48.3[ ]
2X 11.61
294.9[ ]
9.50 241.3[ ]
0.3100 7.874[ ]
3X RUBBER FEET
POLE MOUNT
2X M10
THREADED
MOUNTING HOLE
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SRM450v2 PRECISION ACTIVE
LOUDSPEAKER
SRM450v2 FREQUENCY RESPONSE SRM450v2 INPUT PANEL
SRM450v2 DIMENSIONS

6/6 PAGES
Part No. SW0841 Rev. A 06/10
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INPUT
THRU
2
3
1
2
J15
3
1
HI-PASS
LOW CUT CONTOUR
COMPRESSOR
THRESHOLD
COMPRESSOR
SWEEPING
FILTER
LO-PASSDELAY
176uS
HI-FREQ
40-120 Hz
LO-FREQUENCY
DRIVER
HI-FREQUENCY
DRIVER
TWEE
T
LO-FREQ
AMP
HI-FREQ
AMP
SENSE
RESISTOR
BASS CONTROL SERVO LOOP
WOOF
PEAK
LIGHT
PEAK
DETECTION
MACKIE
SRM450v2
BLOCK DIAGRAM
05.16.08
THRESHOLD
LPF
THRESHOLD
+
–
MID VDC
+
–
LO VDC
+
–
HI VDC
POWER
TRANSFORMER
FUSE
POWER
SWITCH
SWITCHING
POWER
CONTROLLER
ON
OFF
+15VDC
SIGNAL
SENSE
SIGNAL
SENSE MUTE
ON/OFF
CONTROL
MUTE MUTE
POWER
LEDS
THERMAL
LED
THERMAL
SWITCH
LOW AC
VOLTS SENSE
TIMED
TURNOFF
SIGNAL
LED
SRM450v2 PRECISION ACTIVE
LOUDSPEAKER
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
specications at any time without notice. “Mackie” and the “Running
Man” gure 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.
©2010 LOUD Technologies Inc. All Rights Reserved.
Electronic les for this product are available at:
www.mackie.com
Specification Sheet SRM450v2_SS.PDF
Owner’s Manual SRM450v2_OM.PDF
SRM450v2 FLY POINTS
www.mackie.com
16220 Wood-Red Road NE
Woodinville, WA 98072 USA
800-898-3211, Fax [phone], [email protected]
SRM450v2 BLOCK DIAGRAM