Mackie SRM1801 User manual

SRM1801
POWERED
SUBWOOFER
1/4 PAGES
FEATURES:
■18" Powered Subwoofer System
■18" woofer with a 3" voice coil delivers superior output
and low-frequency extension
■1000W of efficient Class-D Fast Recovery™amplification
■Mackie Active electronics provide total system
optimization:
 •Precisioncrossover@125Hz
 •Precisiontuningltersforaccuratebassresponse
■Dual XLR inputs for mono or stereo applications
■ Stereohigh-passandfull-rangeoutputs
■User-adjustable level and polarity controls
■ Individualpower,signal,OL,andthermalprotect 
indicators
■ Polereceptacleformountingfull-rangeloudspeakers
■ Solidplywoodenclosurewithhigh-durability,textured
black paint
■ Extremelylightweightandportable(73lb/33.1kg)
SRM1801
Mackie SRM1801 powered subwoofers provide intense low-
frequency extension and punch to the Mackie SRM450v2
and other powered loudspeakers.
The SRM1801 powered subwoofer delivers 1000W peak
power via Class-D Fast Recovery™ amplification. The
Class-D amp design is ultra-efficient and, along with the
lightweight switch-mode power supply, drastically reduces
this subwoofer’s weight.
Premium circuitry includes built-in Active electronics, like
a precision crossover and tuning filters for accurate bass
response. Also included with the SRM1801 are user-friendly
features such as high-pass and full-range outputs for stereo
operation with a single sub. A polarity switch allows phase
alignment of the SRM1801 to the full-range loudspeakers.
A custom-designed transducer maximizes efficiency and
performance when matched with the system’s internal amp.
The 18-inch woofer uses a ferrite magnet with a 3-inch voice
coil.
The solid plywood enclosure features a ported bass
reflex design that produces tight low end. This makes
the sub extremely lightweight and portable, without
compromising power and performance. The integrated pole-
cup accommodates a standard mounting pole. Pair the
SRM1801 with the popular Mackie SRM450v2 or TH-15a
for an extremely powerful, portable and professional PA
solution.
APPLICATIONS
Small to mid-size club/band PA systems, houses of worship,
DJs, rehearsal spaces, gymnasiums, banquet halls,
A/V rentals and many, many more.

SRM1801
POWERED
SUBWOOFER
2/4 PAGES
SRM1801 SPECIFICATIONS
Acoustic Performance
Frequency Response (–10 dB) 35 Hz - 150 Hz
Frequency Response (–3 dB) 50 Hz - 115 Hz
Max SPL peak (calculated) 1129 dB
Max SPL peak (measured) 2124 dB
1 Calculated from peak driver sensitivity and amplier power, half space.
2 Measured with swept sine at 1 W within operating range, scaled for max
power, half space.
Transducer
Diameter 18.0 in / 457 mm
Voice Coil Diameter 3.0 in / 76 mm
Diaphragm Material Paper
Magnet Material Ferrite
Power Amplifier
Rated Power 500 watts rms
1000 watts peak
Rated THD < 0.1%
Cooling Convection
Design Class D
Input / Output
Input Type Female XLR Balanced
differential (stereo left / right)
Input Impedance 20 k balanced
Full Range Output Male XLR Balanced
(parallel with input)
High Pass Output Male XLR Balanced
Level Control -6 dB to +6 dB
Electronic Crossover
Crossover Type 24 dB / oct.
Linkwitz-Riley
Crossover Frequency 125 Hz
Protection Features
Over-excursion Protection 40 Hz 24 dB / oct.
Butterworth High
Pass Filter
Thermal Protection Amplier mute, auto reset
Driver Protection Peak / RMS Limiter
Display LEDs Thermal, OL, Signal, Power
Operating Temperature 0˚ - 40˚C
32˚ - 104˚F
AC Power Requirements
US 100 - 120 VAC, 50 - 60 Hz
160 watts
EU 220 - 240 VAC, 50 - 60 Hz
160 watts
AC Connector 3-pin IEC 250 VAC
15 A male
Construction Features
Basic Design Trapezoidal
Material Void-free plywood
Finish Textured black catalyzed
polyurethane paint
Handles One on each side
Grille Perforated metal
Physical Properties (packaged product)
Height 27.2 in / 691 mm
Width 24.0 in / 610 mm
Depth 29.3 in / 744 mm
Shipping Weight 80.0 lb / 36.3 kg
Physical Properties (product)
Height 24.1 in / 612 mm
Front Width 20.2 in / 513 mm
Rear Width 15.1 in / 383 mm
Depth 25.3 in / 643 mm
Weight 73 lb / 33.1 kg
Mounting Methods
Floor mount only
WARNING: The cabinet has no rigging points and is not suitable for
rigging. NEVER attempt to suspend the SRM1801 by its handles.
Options
SPM200 Loudspeaker Pole Mount P/N 2035170-01
SRM1801 Cover P/N 2036809-05
Ordering Information
SRM1801 18" Powered Subwoofer, US P/N 0033250-00
SRM1801 18" Powered Subwoofer, EU P/N 0033250-01

3/4 PAGES
SRM1801
POWERED
SUBWOOFER
BA
INPUTS
B
A
B
A
OUTPUTS
HIGH PASS
FULL RANGE
LEVEL
OL SIGNAL POWER
POL ARITY
NORMAL
INVERT
THERMAL
+6dB6dB
-
18-INCH POWERED SOUND REINFORCEMENT SUBWOOFER
LEVEL
+6dB6dB
-
Input XLRs
High Pass Output XLRs
Full Range Output XLRs
Crossover
Signal
LED
OL
LED
Thermal LED
LPF 125 Hz
Overexcursion Protection
HPF 40 Hz
Thermal Monitoring
Amp
Limiter
Polarity
Invert
Thermal Mute
Normal Inverted
Gain
Active Subwoofer Processing
Crossover
HPF 125 Hz
Crossover
HPF 125 Hz
SRM1801 BLOCK DIAGRAM
1/3 OCTAVE RESPONSE
Normalized to 0 dB SPL
Frequency (Hz)
+10
+0
–10
–20
–30
–40
20 50 100 200 400
SRM1801 FREQUENCY RESPONSE
SRM1801 INPUT PANEL

Part No. SW0849 Rev. B 07/11
4/4 PAGES
SRM1801
POWERED
SUBWOOFER
POWER
I
O
BA
INPUTS
B
A
B
A
OUTPUTS
HIGHPASS
FULLRANGE
LEVEL
+6dB-6dB
U
OL SIGNAL POWER
POLARITY
NORMAL
INVERT
THERMAL
18-INCH POWERED SOUND REINFORCEMENT SUBWOOFER
612
[24.1]
643
[25.3]
513
[20.2]
615
[24.2]
353
[13.9]
600
[23.6]
383
[15.1]
NOTES:
1. WEIGHT APPROX. 33.1 kg [73 lb]
2. SHIPPING WEIGHT APPROX. 36.3 kg [80 lb]
SRM1801 DIMENSIONS
Since we are always striving to make our products better by
incorporating new and improved materials, components, and
manufacturing methods, we reserve the right to change these
specifications at any time without notice. “Mackie” and the “Running
Man” figure are registered trademarks of LOUD Technologies Inc.
All other brand names mentioned are trademarks or registered
trademarks of their respective holders, and are hereby acknowledged.
©2011 LOUD Technologies Inc. All Rights Reserved.
Electronic files for this product are available at:
www.mackie.com
Specication Sheet SRM1801_SS.PDF
Owner’s Manual SRM1801_OM.PDF
www.mackie.com
16220 Wood-Red Road NE
Woodinville, WA 98072 USA
800-898-3211, Fax [phone], [email protected]