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Mackie SRM1850 18″ Powered Subwoofer


Mackie SRM1850 18″ Powered Subwoofer


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. The integrated Class-D amplifier drives 1600W of power to the 18″ woofer, which provides a frequency response of 40 to 120 Hz with a max SPL of 132 dB. The tour-grade poplar plywood enclosure is front ported and internally braced to deliver maximum low-frequency extension and punch.

The SRM1850 subwoofer features stereo XLR inputs (L/R) and two full-range outputs as well as two high-pass outputs. The integrated variable digital crossover includes presets for the optional SRM550 and SRM650 full-range loudspeakers. The built-in Smart Protect DSP protects the subwoofer from overloads, while a compression circuit prevents damaging transient peaks while remaining transparent under normal operating conditions. The Mackie SRM1850 ships with a power cord.


The SRM1850 18″ powered subwoofer is designed to sit on the floor or stage. It is not designed to be pole-mounted or suspended. The cabinet has no rigging points and is not suitable for rigging. Never attempt to suspend the subwoofer by its handles.
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
UPC: 663961036381
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 Connector 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
Packaging Info
Package Weight 83 lb
Box Dimensions (LxWxH) 29 x 27.5 x 25″

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