MACKIE SRM-450

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 Crossover : 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
US : 120V, 60Hz
Europe : 230V, 50Hz
Japan : 100V, 50/60Hz

Height : 26.1 in/ 63 mm
Width : 16.0 in / 406 mm
Depth : 14.8 in / 376 mm
Weight : 37 lb / 16.8 kg