Mackie SRM1550 Owner's manual

1200W 15" Powered Subwoofer

OWNER’S MANUAL

Important Safety Instructions

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manu-

facturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves,

or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug.

A polarized plug has two blades with one wider than the other. A grounding­type plug has two blades and a third grounding prong. The wide blade or
the third prong are provided for your safety. If the provided plug does not fit
into your outlet, consult an electrician for replacement of the obsolete outlet.

10.

Protect the power cord from being walked on or pinched particularly at plugs,

convenience receptacles, and the point where they exit from the apparatus.

11.

Only use attachments/accessories specified by the manufacturer.

12.

Use only with a cart, stand, tripod, bracket, or table

specified by the manufacturer, or sold with the

PORTABLE CART

WARNING

apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury
from tip-over.

13.

Unplug this apparatus during lightning storms or when

unused for long periods of time.

14.

Refer all servicing to qualified service personnel. Servicing is required when

the apparatus has been damaged in any way, such as power-supply cord

SRM1550 Powered Subwoofer

or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.

15.

This apparatus shall not be exposed to dripping or splashing, and no object

filled with liquids, such as vases or beer glasses, shall be placed on the
apparatus.

16.

Do not overload wall outlets and extension cords as this can result in a risk

of fire or electric shock.

17.

This apparatus has been designed with Class-I construction and must be

connected to a mains socket outlet with a protective earthing connection
(the third grounding prong).

18.

This apparatus has been equipped with a rocker-style AC mains power

switch. This switch is located on the rear panel and should remain readily
accessible to the user.

CAUTION

RISK OF ELECTRIC SHOCK! DO NOT OPEN!

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED PERSONNEL.

The lightning flash with arrowhead symbol within
an equilateral triangle is intended to alert the user
to the prescence of uninsulated “dangerous voltage”
within the product’s enclosure, that may be of significant
magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user of the presence of important
operating and maintaining (servicing) instructions in the
literature accompanying the appliance.

19.

The MAINS plug or an appliance coupler is used as the disconnect device,
so the disconnect device shall remain readily operable.

20. NOTE: This equipment has been tested and found to comply with

the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

CAUTION: Changes or modifications to this device not expressly approved

by LOUD Technologies Inc. could void the user's authority to operate the
equipment under FCC rules.

21. This apparatus does not exceed the Class A/Class B (whichever is

applicable)
out in the radio interference regulations of the Canadian Department

limits for radio noise emissions from digital apparatus as

set

of

Communications.

ATTENTION —

Le présent appareil numérique n’émet pas de bruits radioélec­triques dépassant las limites applicables aux appareils numériques de class
A/de class B (selon le cas) prescrites dans le réglement sur le brouillage
radioélectrique édicté par les ministere des communications du Canada.

22.

Exposure to extremely high noise levels may cause permanent hearing

loss. Individuals vary considerably in susceptibility to noise-induced hearing
loss, but nearly everyone will lose some hearing if exposed to sufficiently
intense noise for a period of time. The U.S. Government’s Occupational
Safety and Health Administration (OSHA) has specified the permissible
noise level exposures shown in the following chart.

According to OSHA, any exposure in excess of these permissible limits

could result in some hearing loss. To ensure against potentially dangerous
exposure to high sound pressure levels, it is recommended that all persons
exposed to equipment capable of producing high sound pressure levels
use hearing protectors while the equipment is in operation. Ear plugs or
protectors in the ear canals or over the ears must be worn when operating
the equipment in order to prevent permanent hearing loss if exposure is in
excess of the limits set forth here:

Duration, per
day in hours

8 90 Duo in small club
6 92
4 95 Subway Train
3 97
2 100 Very loud classical music

1.5 102
1 105 John screaming at Troy about deadlines

0.5 110

0.25 or less 115 Loudest parts at a rock concert

Sound Level dBA,
Slow Response

Typical Example

Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.

Apparatet må tilkoples jordet stikkontakt.

Apparaten skall anslutas till jordat uttag.

Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household
waste, according to the WEEE directive (2012/19/EU) and your national law. This product should be handed over to
an authorized collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type
of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances
that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will
contribute to the effective usage of natural resources. For more information about where you can drop off your waste
equipment for recycling, please contact your local city office, waste authority, or your household waste disposal service.

2

SRM1550 Powered Subwoofer

WARNING — To reduce the risk of fire or electric shock,

do not expose this apparatus to rain or moisture.

CAUTION — To prevent electric shock hazard, do not connect

to mains power supply while grille is removed.

Contents Features

Owner’s Manual

Important Safety Instructions .................................. 2

Contents ................................................................. 3

Features ................................................................. 3

Introduction ............................................................ 4

How To Use This Manual ......................................... 4

Getting Started ....................................................... 4

Things To Remember ................................................ 4

Hookup Diagrams .................................................... 5

SRM1550 Subwoofer: Rear Panel Features .............. 8

1. Power Connection ......................................... 8

2. Power Switch ............................................... 8

3. XLR Inputs ................................................... 8

4. Normal / Invert Switch [Polarity] .................. 9

5. Gain Knob & Sig / Lim LED ............................ 9

6. High Pass Outputs ........................................ 9

7. Full Range Outputs ........................................ 9

8. Stereo / Mono Switch [Full Range] .............. 10

9. High Pass Mode .......................................... 10

10. Power LED Switch ..................................... 10

Placement ............................................................. 11

The Ins and Outs of Polarity .................................. 11

• 1200W of power paired with a 15” custom
high-output woofer with 3” voice coil delivers
gig-level volumes with room to spare

• Same cosmetic design as the renowned SRM450

• Road-ready “Built-Like-A-Tank” design

• 18 mm, internally reinforced poplar cabinet
and steel grille

• Front ported for maximum low-frequency
extension and punch

• Stereo XLR inputs plus stereo XLR full-range
and high-pass outputs

• Integrated digital crossover with variable
control and presets for Mackie SRM350
and SRM450 loudspeakers

™

• Smart Protect
investment when things get pushed a little
too hard

• Built-in cup for easily pole-mounting full-range
loudspeakers

DSP kicks in to protect your

Smart Protect ....................................................... 12

Limiting .......................................................... 12

Overexcursion Protection ................................ 12

Thermal Protection .......................................... 12

AC Power ............................................................. 12

Care and Maintenance ........................................... 12

Appendix A: Service Information ............................ 13

Appendix B: Technical Information .......................... 15

SRM1550 Dimensions ..................................... 16

SRM1550 Frequency Response ........................ 16

SRM1550 Block Diagram ................................. 17

Limited Warranty .................................................. 18

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• Extremely portable design weighing in at only

65.5 lb / 29.7 kg

Please write your serial number here for future
reference (i.e., insurance claims, tech support,
return authorization, make dad proud, etc.)

Purchased at:

Date of purchase:

Watch our dang videos

Part No. SW1145 Rev. A 01/16

©2016 LOUD Technologies Inc. All Rights Reserved.

Owner’s Manual

3

Introduction

Getting Started

The Mackie SRM1550 powered subwoofer is
designed from the ground up to be the perfect match
for SRM450 and SRM350 speakers, delivering 1200W
of raw power paired with a custom high-output
15" woofer for powerful room-shaking performance.

The road-worthy internally reinforced Poplar cabinet
delivers on the “Built-Like-A-Tank” legacy that the
SRM series is known for and its front ported design
provides maximum punch and low-frequency extension.

The SRM1550 features stereo XLR inputs,
full-range and high-pass outputs plus a variable
digital crossover that includes presets for the
Mackie SRM350 and SRM450.

Get the powerful low end you need from
the subwoofer built on the proven SRM legacy.

SRM1550 Powered Subwoofer

The following steps will help you set up the

subwoofers quickly.

1. Make all initial connections with the power
switches OFF on all equipment. Make sure the master
volume, level, or gain controls are all the way down.

2. Connect the line-level outputs from the mixing
console (or other signal source) to the XLR inputs on
the rear panel of the SRM1550 subwoofer(s).

3. Connect the high pass outputs from the SRM1550
subwoofer(s) to the inputs of powered loudspeakers
(or to an amplifier powering passive loudspeakers).

4. Connect the supplied AC power cords to the
IEC sockets on the rear panel of each subwoofer.
Plug the other end into an AC outlet properly configured
with the correct voltage as indicated below the IEC
socket.

5. Turn the mixer (or other signal source) on.

6. Turn the subwoofer(s) on.

7. Turn the loudspeaker(s) on.

How to Use This Manual:

After this introduction, a getting started guide will
help you get things set up fast. The hookup diagrams
show some typical setups, while the remaining sections
provide details of the SRM1550 subwoofer.

This icon marks information that is critically
important or unique to the subwoofer. For
your own good, read and remember them.

8. Start the signal source and raise the mixer’s

main L/R fader up until audio may be heard.

9. Adjust the master volume of the mixer to a

comfortably loud listening level.

10. Read the rest of this manual to learn how to set
the high pass mode to really dial in a sound for the
venue.

Things to Remember:

• Never listen to loud music for prolonged periods.
Please see the Safety Instructions on page 2 for
information on hearing protection.

• As a general guide, the mixer (or other signal
source) should be turned on first, subwoofers
next, and loudspeakers last. As such, the
loudspeakers should also be turned off first,
followed by the subwoofers, then the mixer.
This will reduce the possibility of any turn-on
or turn-off thumps and other noises generated
by any upstream equipment from coming out of
the speakers.

• Save the shipping boxes and packing materials!
You may need them someday. Besides, the
cats will love playing in them and jumping out at
you unexpectedly. Remember to pretend like you
are surprised!

4

SRM1550 Powered Subwoofer

• Save your sales receipt in a safe place.

Hookup Diagrams

SPEAKER

MODE

PA

DJ

MON

SOLO

SIG/OL

GAIN

U

LINE MIC

MAXOFF

SRM350v3SRM1550

FEEDBACK

DESTROYER

1

ON

2

3

HOLD TO

4

CLEAR

SIG/OL

GAIN

U

LINE MIC

MAXOFF

MAIN

LIMIT

R L

CH 1
MIX

Owner’s Manual

ON
OFF

LED

SRM350v3

SPEAKER

MODE

PA

DJ

MON

SOLO

SIG/OL

GAIN

U

LINE MIC

MAXOFF

FEEDBACK

DESTROYER

1

ON

2

3

HOLD TO

4

CLEAR

SIG/OL

GAIN

U

LINE MIC

MAXOFF

MAIN

LIMIT

R L

CH 1
MIX

ON
OFF

LED

In this example, an SRM1550 subwoofer is connected to two SRM350v3 loudspeakers. It is a perfect
setup for a small club.

Here, the L/R outputs of a 1642VLZ4 mixer are connected directly to the channel A and B inputs of a
single SRM1550 subwoofer.

The channel A and B high pass outputs of the SRM1550 subwoofer are connected directly to the channel
1 inputs of each SRM350v3 loudspeaker. Set the subwoofer level to unity and be sure that the gain knob
on each loudspeaker is set to “line”. Select the SRM350 high pass mode on the SRM1550 for a matched
system.

Small Club System

Owner’s Manual

5

Hookup Diagrams continued...

SPEAKER

MODE

PA

DJ

MON

SOLO

GAIN

U

LINE MIC

SIG/OL

MAXOFF

FEEDBACK

DESTROYER

1

ON

2

3

HOLD TO

4

CLEAR

SIG/OL

GAIN

U

LINE MIC

MAXOFF

LIMIT

R L

SRM1550 Powered Subwoofer

MAIN

SRM450v3SRM450 v3

SPEAKER

MODE

ON
OFF

LED

CH 1
MIX

PA

DJ

MON

SOLO

GAIN

U

LINE MIC

SIG/OL

MAXOFF

FEEDBACK

DESTROYER

1

ON

2

3

HOLD TO

4

CLEAR

SIG/OL

GAIN

U

LINE MIC

MAXOFF

MAIN

LIMIT

R L

CH 1
MIX

ON
OFF

LED

SRM1550SRM1550

In this example, SRM1550 subwoofers line each side of the stage and are connected to SRM450v3
loudspeakers. This fully powered PA is desired when you need a system with deep, commanding
lows and nice, crisp highs.

Here, the L/R outputs of a DL1608 mixer are connected directly to the channel A input of each SRM1550
subwoofer. The channel A high pass output of each SRM1550 subwoofer is connected directly to the
channel 1 input of each SRM450v3 loudspeaker. Set the subwoofer levels to unity and be sure that the
gain knob on each loudspeaker is set to “line”. Select the SRM450 high pass mode on both SRM1550s
for a matched system.

Large Club System

6

SRM1550 Powered Subwoofer