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SRM450 v2 Active PA Loudspeaker

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Studio-quality sound in a 12" active PA speaker.

The Mackie SRM450 v2 PA Speakers retain the best of the original SRM design, including Mackie signature Active architecture and its renowned rugged durability. With ultra-efficient switching power supplies, a lightweight neodymium woofer, an all-new compression driver and Class-D Fast Recovery amplification (300W LF/100W HF), the SRM450v2 packs way more power, clarity and punch. Its wide dispersion, outstanding bass extension and ultra-low distortion mean the SRM450v2 delivers pure studio monitor fidelity at full-on loudspeaker levels. The Mackie SRM450v2 Active loudspeaker combines superior quality with innovative technology to bring ultimate performance and reliability to the legendary Sound Reinforcement Monitor (SRM) series.


  • 2-way bi-amplified, optimized active loudspeaker system
  • High-output precision titanium compression driver
  • Neodymium long-throw low frequency transducer with 3-inch voice coil
  • Servo Feedback controlled woofer for tight low-end punch
  • 300W class-D, Fast Recovery LF amp/100W HF amp
  • Ultrawide, smooth dispersion via multi-cell horn aperture and HF waveguide
  • Built-in phase-accurate 24dB Linkwitz-Riley electronic crossover
  • Mackie Active Electronic time alignment, phase correction and EQ for studio quality sound
  • Mic/line input and pass-thru connector
  • Lightweight for ultimate portability (40 lb.)
  • Flyable, Pole Mountable, Floor Wedge-able

SRM450 v2 Active PA Loudspeaker Specifications:

  • 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: 127dB
  • 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: -10C to 45 C (14F to 113F)
  • 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
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