Mackie SRM450 Brochure

SRM450
 The Mackie SRM450 is a full range, portable, active
loudspeaker system providing high output, wide disper-
sion, and low distortion performance in a compact, com-
posite molded enclosure. Two amplifiers independently
power a high precision 12-inch professional woofer and
1.75-inch diaphragm titanium compression driver with a
1-inch exit throat. A sophisticated electronic control sys-
tem provides phase correction, crossover, and five modes
of thermal and active system protection.
 The SRM450 is fitted with a specially designed horn
assembly that combines both an exponential and conical
geometry. With the addition of a multi-cell horn throat
aperture, the complete assembly provides unparalleled
dispersion characteristics. The result is super smooth, low-
distortion linear audio performance across the entire spec-
ified coverage angle of 90 degrees.
 A servo feedback circuit has been added to the low-
frequency amplifier in order to provide extended bass
response and woofer control. This design provides simul-
taneous positive and negative signal feedback information
from the woofer's magnetic circuit to the low-frequency
amplifier. This loop locks the two devices together and
provides extreme control of the woofer mass. The result is
extended linear movement of the woofer cone resulting in
very high SPL low-frequency output levels.
 Careful attention has been given to the ergonomic fea-
tures of the system. The center of gravity, handle loca-
tions, handle design, position of fly-points, and ease of
use have been carefully thought out. There is also an inte-
grated pole mount on the bottom of the cabinet and a
weather-resistant steel grille. The asymmetrical trapezoi-
dal cabinet has been designed to provide an ideal floor
monitoring position.
 The SRM450 features a number of unique control fea-
tures including a single microphone and line-level control
in addition to a high-pass filter for floor monitoring appli-
cations, an AC timed turn off function that is ideal for fixed
or remote installations, and a contour switch for low-level
or background-level sound reinforcement applications.
 The SRM450 cabinet is constructed of high pressure
injected polypropylene. The enclosure features ample
amounts of reinforcement ribbing and structural strength-
ening resulting in a strong, super-rigid design providing
ideal acoustical characteristics.
SRM450
Active 2-Way Sound
Reinforcement Speaker System
Features
Bi-amplification with 300 watts rms low-frequency
and 100 watts rms high-frequency power
127 dB peak SPL
Wide dispersion, studio-quality high-frequency
horn with multi-cell aperture throat
Large format exponential/conical high-frequency
horn mouth
State-of-the-art precision 1.75-inch titanium
compression driver
Servo feedback controlled 12-inch high-efficiency,
light mass woofer
Single mic/line level control
High-pass switch for floor monitoring applications
Contour switch provides ideal low to medium
level music playback equalization
Timed turn-off AC switch
Complete electronic and component protection
circuitry
Electronic equalization and phase alignment
Professional trapezoidal enclosure design
Built-in pole mount cup on bottom
Tilts on its side for use as a stage monitor
Correctly weight-balanced with two comfort-
able side handles for easy carrying and set up
Applications
Live and playback applications

Small to medium sized portable PA systems

Corporate events

Houses of worship

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