Specifications - Mackie SRM450 Service Manual

Specifications

Low-Frequency Transducer
Diameter 300mm (12")
Voice Coil Diameter 63.5mm (2.5")
Sensitivity (1W@1m) 98 dB
Nominal Impedance 8 ohms
Power Handling 300W
Frequency Range 50Hz – 3000Hz
High-Freq Driver and Horn
Diaphragm Diameter 44.5mm (1.75")
Exit Throat Diameter 24.5mm (1")
Diaphragm Material Titanium
Sensitivity (1W@1m) 106 dB
Nominal Impedance 8 ohms
Power Handling 150W
Frequency Range 1000Hz – 20,000Hz
Low-Freq Power Amplifier
Rated Power 300 watts
Rated THD < 0.1%
Cooling: Convection Extrusion
Design: Class G, Parametric Servo
Feedback
High-Freq Power Amplifier
Rated Power 100 watts
Rated THD < 0.1%
Cooling: Convection Extrusion
Design: Conventional Class AB
System specs
Input Type Balanced Differential
Input Impedance Line: 20k ohms
Input Protection RFI and level protected
Sensitivity Line: +4 dBu (centered)
Mic: –36 dBu
Maximum Input Level Line: +22 dBu
Low-Cut Frequency 75Hz, Second-order filter
EQ Peaking +3 dB @ 55Hz,
Over-Excursion Protection
Second-Order High-Pass
Filter
Thermal Protection Amplifier shutdown, auto-
reset
Low-Line Voltage Shut Down: 60% Nominal line
Acoustic Freq Response: 45Hz – 20,000Hz
Low-Freq –3 dB Point: 55Hz
Maximum SPL @ 1m: 123 dB
Low-Freq Crossover: 24 dB/octave, time offset
corrected
High-Freq Crossover: 24 dB/octave
Crossover Frequency: 1600Hz
Driver Protection Independent LF and HF
compressors
Low-Freq Roll-Off: Dynamic-signal level de-
pendent
Accessory Interface ±15V DC
Operating Temp Range –10ºC - 45ºC (14ºF - 113ºF)
Line Input Power
US 120V, 60Hz
Europe 230V, 50Hz
Japan 100V, 50/60Hz
Disclaimer
Since we are always striving to make our products
better by incorporating new and improved materi-
als, components, and manufacturing methods, we
reserve the right to change these specifications at
any time without notice.
©1999 Mackie Designs Inc.
All Rights Reserved.
+3 dB @ 20kHz
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