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The Mackie SRM1850 18" Powered Subwoofer is designed to extend the low-frequencies of sound systems and is well suited for various sound reinforcement applications including portable DJ's, live stage, houses of worship, theater, rehearsals, and more. 

More Information

  • 1600W of power paired with a 18" woofer for high low-end performance
  • All-wood construction with internally braced cabinet for near-zero distortion
  • Front ported for maximum low-frequency extension and punch
  • Stereo XLR inputs, stereo XLR full-range outputs, and stereo high-pass outputs
  • Integrated digital crossover with variable control and presets for the SRM550 and SRM650 loudspeakers (sold separately)
  • Smart Protect DSP for protection
  • Built-in cup for easily pole-mounting full-range loudspeakers

Technical Specification


PA Speaker
Configuration Active Subwoofer
Enclosure Type Bass-Reflex Subwoofer
Total Power Capacity 800 W RMS
1600 W Peak
Amplifier Class Class-D
LF Driver 1 x 18" / 457 mm Paper Woofer
LF Voice Coil 3" / 76 mm
Magnet Ferrite
Frequency Response 40 Hz to 120 Hz -3 dB
35 Hz to 150 Hz -10 dB
Maximum SPL 132 dB
I/O Impedance Input:
20 Kilohms (Balanced)
10 Kilohms (Unbalanced)
THD <1%
Protections RMS, Thermal
Audio I/O 2 x XLR 3-Pin Female Balanced Input
2 x 
XLR 3-Pin Male Balanced Line Output
2 x 
XLR 3-Pin Male Balanced High-Pass Output
Signal Processing
Crossover 60 to 120 Hz
Dynamic Processing Peak Limiter
Alignment Delay Yes
AC Input Power 100 to 120 VAC, 60 Hz 
AC Power I/O 1 x IEC
Power Consumption 200 W
Handles 2 x Side
Cooling Convection
Construction Material Metal Grille, Plywood
Operating Temperature 32 to 104°F / 0 to 40°C
Dimensions 22.5 x 22.2 x 23.9" / 572 x 565 x 608 mm
Weight 64 lb / 29 kg


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