Mackie Monitor SRM-450

Forget about what other small PA speakers sound like. Especially forget what so-called "powered" speakers sound like. The active SRM450 is that different.
It has tight, steel-fisted bass to below 55Hz and detailed, articulate treble out to 20,000Hz. Midrange is warm, natural, and free from ear-fatiguing harshness. The SRM450 has astonishingly wide dispersion that lets your whole audience hear clearly, whether they're in the front, back, or way out on the sides of the room.
And above all, the SRM450 cranks! Without a hint of distortion, it effortlessly achieves sound pressure levels that would melt conventional speakers into a pile of molten slag.

Features

2-way bi-amplified, optimized active system - no external power amplifier needed! Built-in monolithic FR Series™ 300 watt RMS bass & 100 watt RMS mid/high amplifiers Built-in precision 24dB/oct. Linkwitz-Riley electronic crossover 300mm long-throw frequency transducer High-output precision titanium compression driver Studio-quality maximum dispersion horn design High SPL Output/Low Distortion Electronic Time Correction, Phase Alignment, & Equalization Servo Feedback controlled woofer Tough, impact-resistant, lightweight polypropylene enclosure Gig-bag available

Technical Data

System:
Input Type: Balanced Differential
Input Impedance Line: 20k ohms
Input Protection RFI and level protected
Sensitivity Line: +4 dBu
(center detent)
Mic: -36 dBu
Maximum Input Level Line: +22 dBu
Low-Cut Frequency 75Hz, Second-order filter
Acoustic Contour Equalization Peaking: +3 dB @ 100Hz; +3 dB @ 12kHz
Enclosure Alignment Sixth-Order
Over-Excursion Protection Second-Order
High-Pass Filter
Thermal Protection Amplifier shutdown, auto reset
Low-Line Voltage Shut Down 60% Nominal line
Frequency Range: (-10 dB) 45Hz - 20KHz
Frequency Response: (±3 dB) 55Hz - 18kHz
Maximum Peak SPL @ 1m 127 dB
Low-Freq Crossover: 24 dB/octave, time offset corrected
High-Freq Crossove:r 24 dB/octave
Crossover Frequency: 1.6kHz
Driver Protection Independent LF and HF compressors
Low-Freq Roll-Off Dynamic-signal level dependent
Accessory Interface: ±15V DC, normalized signal I/O
Operating Temperature Range: -10°C to 45° C (14°F to 113°F)

Transducer:
Low-Frequency Transducer:
Diameter: 300mm (12")
Power Handling: 450 watts RMS
Frequency Range: 45Hz - 3kHz

Hi-Frequency Driver and Horn:
Diaphragm Diameter: 44mm (1.75")
Exit Throat Diameter: 25mm (1")
Diaphragm Material: Titanium
Sensitivity (1W@1m): 106 dB
Power Handling: 100 watts RMS
Frequency Range: 1kHz - 20kHz
Horn Type Composite: Exponential and Conical
Mouth Size: 305mm (12") W x 178mm (7") H

Horn Coverage :
Horizontal Coverage: 90°
Vertical Coverage: 45°


Power Amplifier and System:
Low-Frequency Power Amplifier:
Rated Power: 300 watts RMS
Rated THD: < 0.1%
Cooling Convection Extrusion
Design Class G, Parametric Servo Feedback

High-frequency amplifier:
Rated Power: 100 watts @ High-Frequency Driver Impedance
Rated THD: < 0.1%
Cooling Convection Extrusion
Design Conventional Class AB

Line Input Power: Europe 230V, 50Hz


Dimensions:
Height 660mm (26")
Width 390mm (15.4")
Depth 376mm (14.8")
Weight 23.2kg (51 lbs.)
Enclosure Geometry Asymmetrical Trapezoidal
Mounting Methods Integrated mounting points, M10