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 manufacturer’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. No naked flame sources, such as lighted candles, should be placed on the apparatus.
10. 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 grounding-type 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.
11. Protect the power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
12. Only use attachments/accessories specified by the manufacturer.
13. Use only with a cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a cart
is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
14. Unplug this apparatus during lightning storms or when unused
for long periods of time.
15. Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any way,
SRM-Flex Portable Column PA System
such as power-supply cord 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.
16. 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.
17. Do not overload wall outlets and extension cords as this can result in a risk of fire
or electric shock.
PORTABLE CART
WARNING
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 prescence of important operating and
maintaining (servicing) instructions in the literature accompanying
the appliance.
18. 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).
19. 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.
20. The MAINS plug or an appliance coupler is used as the disconnect device,
so the disconnect device shall remain readily operable.
21. The use of apparatus is in tropical and/or moderate climates.
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.
22. NOTE: This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 5 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 o 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 dierent 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
Audio, LLC could void the user’s authority to operate the equipment under FCC rules.
23. This device complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This device should be installed and operated with minimum distance
20cm between the radiator & your body.
24. This apparatus does not exceed the Class A/Class B (whichever is applicable) limits
for radio noise emissions from digital apparatus as set out in the radio interference
regulations of the Canadian Department 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.
25. This device complies with Industry Canada’s licence-exempt RSSs.
Operation is subject to the following two conditions:
() this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause
undesired operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux
appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions
suivantes:
() l’appareil ne doit pas produire de brouillage, et
(2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi,
même si le brouillage est susceptible d’en compromettre le fonctionnement.
26. 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 suciently 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 00 Very loud classical music
.5 02
05 Craig screaming at Troy about deadlines
0.5 0
0.25 or less 5 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 (202/9/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 eective usage of natural resources. For more information about where you can drop o your waste equipment
for recycling, please contact your local city oce, waste authority, or your household waste disposal service.
2
SRM-Flex Portable Column PA System
Contents Features
Owner’s Manual
Important Safety Instructions ........................................... 2
Contents / Features ............................................................ 3
Introduction / Getting Started ........................................... 4
Hookup Diagrams ............................................................... 5
Base Station ........................................................................ 9
SRM-Flex Connect™ App ................................................... 9
SRM-Flex: Rear Panel Features ......................................... 9
. Power Connection ....................................................9
2. Power Switch ........................................................... 9
SRM-Flex: Top Panel Features ..........................................0
3. Power LED ...............................................................0
4. XLR and /4" Combo Inputs [Chs. and 2] ...........0
5. Line / Hi-Z Switches [Chs. and 2] .......................
6. /4" Stereo Line Inputs [Ch. 3/4] ..........................
7. Sig / OL LEDs ...........................................................
8. /8" Stereo Line Input [Ch. 5/6] ...........................
9. Bluetooth Button [Ch. 5/6] ...................................
0. Volume Knobs .......................................................2
. Reverb Send Knobs [Chs. and 2] .......................2
2 and 3. Low and Hi EQ Knobs [Chs. and 2] .......2
4. Reverb Button .......................................................3
5. Speaker Mode Button...........................................3
6. Super Power Button .............................................3
7. Master Volume Knob .............................................4
8. Main Meters ..........................................................4
9. Limiter LED ...........................................................4
20. Mix Out .................................................................4
Protection Circuitry ...........................................................5
Limiting .......................................................................5
Overexcursion Protection ..........................................5
Thermal Protection ....................................................5
AC Power ............................................................................5
Care and Maintenance ......................................................5
Placement ..........................................................................6
Appendix A: Service Information ...................................... 7
Appendix B: Technical Information ..................................8
SRM-Flex Dimensions ................................................9
SRM-Flex Block Diagram ..........................................20
• Lightweight, Small Footprint, Built-Like-A-Tank
o Lightweight all-in-one design oers everything
you need for your gig
o Load in to your next gig and be set up in minutes
o Fits just about anywhere and disappears in any room
o Rugged design is built to last
• Proven SRM Sound with Ultra-Wide Coverage
o 300W of power delivers maximum headroom
and top performance
o 6-driver wide-dispersion array and 0" subwoofer
provide crystal-clear, room-filling sound
o Adjustable height directs the sound at ear level
for optimal coverage and clarity
o For audiences of up to 00 people
• Complete Wireless Control with SRM-Flex Connect™
o Pair your smartphone and get wireless control over
everything from channel levels to EQ, system presets,
and more
o Mount your phone to your mic stand for on the fly
adjustments or have a dedicated engineer mix you
from the audience
o Compatible with iOS and Android® devices*
• Stream Your Music
o Need to play some break music or a backing track?
No need to worry about the cable. Stream music straight
from your phone or any Bluetooth® enabled device.
• Built-in 6-Channel Digital Mixer
o The built-in 6-channel digital mixer has inputs for mics,
instruments, and media players
o Professional XLR out allows for connection
to an additional SRM-Flex or front-of-house mixer
• Dial in Your Sound
o 2-Band EQ on channels and 2 allow you to easily adjust
the tone of your mic, guitar, keyboard, or anything else
you plug in to get the sound just right
o Application voicing modes tailor the system to your
application and venue. Choose between Music, Speech,
and Live.
• Find the Perfect Reverb
o Put the finishing touch on your sound with a choice
of not just , but 3 great-sounding reverbs
• Zero-Fuss Physical Controls
o With tactile knobs for every critical function
and adjustment, you can get to what you need without
the hassle of navigating menus on a small screen
• Weight and Dimensions (H x W x D)
o 29.6 lb. / 3.4 kg
o 7.0 x 3.0 x 4.2 in / 432 x 330 x 36 mm (Base only)
o 79.0 x 2.8 x 3.0 in / 2007 x 7 x 76 mm
(Total size with extenders)
Limited Warranty ...............................................................2
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Part No. SW277 Rev. B 0/9
©2019 LOUD Audio, LLC. All Rights Reserved.
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• Included Accessories
o Carry bag for array module and extenders
o Protective cover for subwoofer/mixer module
*SRM-Flex Connect requires iOS or later or Android 6 or later
Watch our dang videos
Owner’s Manual
3
Introduction
Getting Started
The Mackie SRM-Flex Portable Column PA System features
a compact, lightweight form factor, signature SRM Series
sound quality, and intuitive Mackie mixer design for maximum
flexibility.
With a staggering 300W of power, custom 6-driver
wide-dispersion array, and 0" subwoofer, SRM-Flex has
plenty of headroom to ensure crystal-clear, room-filling
sound.
The built-in 6-channel digital mixer makes it easy to dial
in your optimal sound in minutes with full control over levels,
EQ, reverb, and more via physical knobs or wirelessly on your
phone. You can even stream music or backing tracks via any
Bluetooth® enabled device.
Perfect for solo acts, bands, corporate events, schools,
and more.
How to Use This Manual:
SRM-Flex Portable Column PA System
Afer this introduction, a getting started guide will help
you get things set up fast. The hookup diagrams show some
typical SRM-Flex setups.
The following steps will help you set up the SRM-Flex quickly.
. Make all initial connections with the power switch OFF.
2. Connect height extension module(s) and/or HF driver
column to the base station. [Instructions discussed in
greater detail on page 9.]
3. Plug signal sources into SRM-Flex, such as:
• Microphones plugged into the mic inputs.
• Instrument level sources, such as acoustic guitars
w/active pickups into the instrument inputs
• Line-level sources such as keyboards,
drum machines, or MP3 players plugged
into the line-level inputs.
• Smartphone paired and connected via Bluetooth.
4. Push the line cord securely into the IEC connector
and plug the other end into a grounded AC outlet.
5. Turn SRM-Flex on.
This icon marks information that is critically
important or unique! For your own good, read and
remember them...it is a good idea to pay special
attention to these areas in the Owner’s Manual
marked with the “VERY IMPORTANT” hand icon.
There’s an illustration of a microscope,
so, of course, you’re going to get more
detailed information when you see this little
guy. There are explanations of features
and practical tips listed here.
It’s a good idea to pay attention to text displayed
next to a note icon, as this icon draws attention
to certain features and functions relating to the
usage of the SRM-Flex.
Please write the serial numbers here for future reference
(i.e., insurance claims, tech support, return authorization,
make dad proud, etc.)
Purchased at:
Date of purchase:
6. Be sure that the volume of the input is the same as it would
be during normal use.
7. Slowly bring up the main output level to a comfortable
listening level.
Things to Remember:
• Never listen to loud music for prolonged periods. Please see
the Safety Instructions on page 2 for information on hearing
protection.
• 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!
• Save your sales receipt in a safe place.
4
SRM-Flex Portable Column PA System
Hookup Diagrams
Owner’s Manual
HI
LOW
SIG/OL SIG/OL
HI
LOW
EQ RVB
SRM-Flex is the perfect tool for singer-songwriters touring the local coee shops. Bring your favorite axe and mic,
SRM-Flex and cables and power cord. Do you have a special guest that joins you on keys on a few tracks? Have them
bring their keyboard, cables and power cord, as well!
In this example, a dynamic microphone is connected to the channel input of SRM-Flex. Note that the mic-line / Hi-Z switch
is set to “mic” (switch lef).
Now grab your axe and plug it directly into the channel 2 input. Or if you use eects, connect the guitar to the eects input
and another cable from the eects output to the channel 2 input. Note here that the mic-line / Hi-Z switch is set to “Hi-Z”
(switch right).
Your friend’s keyboard may be plugged directly into stereo inputs 3/4 using cables with /4" jacks. Lastly, a phone
may be connected via Bluetooth to stereo channel 5/6. The phone can be used as playback music between sets
and/or as backing tracks to your compositions!
Before wowing the crowd with your tunes, you will want to set a speaker mode, described in detail on page 3.
For this type of setup, live works well.
Singer-Songwriter Setup
Owner’s Manual
5
Hookup Diagrams continued...
SRM-Flex Portable Column PA System
HI
LOW
SIG/OL SIG/OL
HI
LOW
EQ RVB
SRM-Flex is a really simple – yet very powerful – tool to use for presentations, karaoke and other similar situations.
Here we just attached two mics to channels and 2 of SRM-Flex. Note that the mic-line / Hi-Z switch is set to “mic”
(switch lef) on both channels.
Set the speaker mode to speech and deliver the great news to your company employees, to the board, stakeholders,
convention attendees, or whatever other presentation you can think of... the possibilities are endless!
Is there a post-speech karaoke-o? Or maybe there is no speech and you’re just having friends over on a Saturday
night for karaoke. Either way, keep the mics as they are, plugged into channels and 2, but also connect a phone
via Bluetooth to stereo channel 5/6. This phone has all of the karoke tracks. What song(s) will you sing?!
For karaoke, you will want to set the speaker mode to music. More information about speaker mode is described in detail
on page 3.
Presentation and/or Karaoke System
6
SRM-Flex Portable Column PA System
Hookup Diagrams continued...
HI
HI
LOW
LOW
EQ RVB
Owner’s Manual
HI
HI
LOW
LOW
EQ RVB
SIG/OL SIG/OL
SIG/OL SIG/OL
Perhaps you’re a DJ that’s been hired to work a wedding. Well, the SRM-Flex works great for playing bumpin’ tunes all night
to the happy newlyweds and raucous crowd that’s groovin’ and dancin’ to your fine selection.
In this example, a mic is connected to channel of SRM-Flex and the mic-line / Hi-Z switch is set to “mic” (switch lef).
This mic may be used for best man / maid of honor toasts, for the DJ to announce the couple’s first dance and any
“...someone with a blue truck, license plate XYZ23 lef their lights on...” announcements.
All the music is on a playlist on the DJ’s laptop. It’s connected directly to the /8" stereo channel 5/6 input.
The last connection is an XLR cable from the mix out jack of the first SRM-Flex to the channel input of an additional
SRM-Flex.
The speaker mode on both may be set to speech when toasts are happening and switched back to music when the dancing
begins!
Pro Tip: wrap each SRM-Flex with wedding garland so they blend in with the theme!
Wedding System
Owner’s Manual
7
Hookup Diagrams continued...
SRM-Flex Portable Column PA System
HI
LOW
SIG/OL SIG/OL
HI
LOW
EQ RVB
Now we’re on to the small club system. SRM-Flex is great because it breaks down into a smaller, more portable system,
leaving room in your ride for all of the other necessary gear.
Here we hooked up a mic to channel [mic-line / Hi-Z switch is set to “mic” (switch lef)] and a rad guitar to channel 2
[mic-line / Hi-Z switch is set to “Hi-Z” (switch right)]. An analog synthesizer is plugged directly into stereo inputs 3/4
and a drum machine into the /8" stereo input 5/6.
The last connection is an XLR cable from the mix out jack of the SRM-Flex to the channel input of a Mackie Thump2A
loudspeaker. This can deliver the sound to people who aren’t near the stage or SRM-Flex.
The speaker mode may be set to live. There’s a crowd waiting to hear your music, go break a leg!
Small Club System
8
SRM-Flex Portable Column PA System
Base Station
Before even plugging the SRM-Flex in and turning
it on, the high frequency driver column needs to be
connected to the base station / subwoofer. This can
be done with or without the height extension modules
(aka spacers).
If the high frequency driver column
is not attached, the SRM-Flex will not
sound great. At all. This is because only
the subwoofer is being used.
To help determine how many height extension
modules are needed (if any), check out the venue
and compare it to where people will be in relation
to the SRM-Flex. Placement is important and more
information may be found on page 7. Please determine
that information before attaching any height extension
modules.
On the top of the base station / subwoofer (near
the grille) is a square opening. This opening is where
to place the height extension modules and/or high
frequency driver column.
Connection is simple. There is only one way
Owner’s Manual
the height extension modules and high frequency
driver column fit into each other and the SRM-Flex’s
base station / subwoofer: bottom into top (see
drawings on the bottom-lef) with the grille(s)
facing the same way as the grille of the base station /
subwoofer. The back side of the height extension
modules and high frequency driver column are
flat black (no grille) with holes leading to screws.
Do not remove these (or any) screws.
You will void the warranty if you do!
SRM-Flex Connect™ App
SRM-Flex is designed to be used in conjunction with
the SRM-Flex Connect App. With it, all of the hardware
features listed here – and more! – may be controlled
remotely via Bluetooth connection. The only thing the
SRM-Flex Connect App can’t do is turn the unit on and
o, select between mic/line or Hi-Z or pair a Bluetooth
device.
More information about the SRM-Flex Connect App
may be found by visiting the SRM-Flex Connect App
Reference Guide.
The height extension modules contain Molex-type
connectors on both the top and bottom, indicating that
the assembly is not yet complete. The front of the high
frequency driver column contains a Running Man logo
on the front and the top is capped. The high frequency
driver column should be the last piece connected
to SRM-Flex.
SRM-Flex: Rear Panel Features
. Power Connection
This is a standard 3-prong IEC power connector.
Connect the detachable power cord (included in
the packaging) to the power receptacle, and plug
the other end of the power cord into an AC outlet.
Make sure that the AC power is matched
to the AC power indicated on the rear panel
(next to the IEC receptacle).
Disconnecting the plug’s ground pin
is dangerous. Don’t do it!
Bottom Connector
Top Connector
100-240VAC
50-60 Hz 110W
2 1
2. Power Switch
Press the top of this rocker switch inwards to turn
on the SRM-Flex. Press the bottom of this rocker
switch inwards to turn it o.
Owner’s Manual
9
SRM-Flex: Top Panel Features
2
3. Power LED
This LED will illuminate green when the SRM-Flex
is turned on, as a reminder of how on it really is.
If it is not on, then it is o, and it becomes a rather
nice weight for keeping your morning newspaper
from blowing away in the wind.
If it does not turn on, make sure the power cord
is correctly inserted at both ends, the local AC mains
supply is active, and the power switch is on.
HI
LOW
13
12
11
HI
LOW
18
17
EQ RVB
15
3
19
14
There is a horizontal LED bar located
near the bottom of the base station /
subwoofer, as well as near the top
of the high frequency driver column.
These, too, will illuminate green when powered up.
However, they may be turned o or set to show signal
via the SRM-Flex Connect App. Read the reference
guide for more information.
SRM-Flex Portable Column PA System
4. XLR and /4" Combo Inputs [Chs. and 2]
Input channels and 2 may accept a balanced
mic signal using an XLR connector. They are wired
as follows, according to standards specified by
the AES (Audio Engineering Society).
XLR Balanced Wiring:
Pin = Shield (ground)
Pin 2 = Positive (+ or hot)
Pin 3 = Negative (– or cold)
SHIELD
HOT
1
3
COLD
1
3
2
In addition to accepting a balanced mic signal
using an XLR connector, these input channels may
also accept /4" line-level signals driven by balanced
or unbalanced sources.
Also, both channels may accept a Hi-Z source
(such as a guitar) via the /4" input without
the need for a separate DI box. Be sure to set
the Mic / Hi-Z switch to the right, though!
SHIELD
COLD
HOT
10
SIG/OL SIG/OL
7
5
4
To connect balanced lines to these inputs, use
a /4" Tip-Ring-Sleeve (TRS) plug. “TRS” stands
for Tip-Ring-Sleeve, the three connection points
available on a stereo /4" or balanced phone jack
or plug. TRS jacks and plugs are used for balanced
signals and are wired as follows:
/4" TRS Balanced Mono Wiring:
Sleeve = Shield
Tip = Hot (+)
Ring = Cold (–)
TIP
To connect unbalanced lines to these inputs,
use a /4" mono (TS) phone plug, wired as follows:
/4" TS Unbalanced Mono Wiring:
Sleeve = Shield
Tip = Hot (+)
6 20
SLEEVERING
SLEEVE
TIP
RING
TIP
SLEEVE
TIPSLEEVE
RING
TIP
SLEEVE
TIPSLEEVE
9
8
10
NEVER connect the output of an amplifier
directly to an input jack. This could damage
the input circuitry!
SRM-Flex Portable Column PA System
SRM-Flex: Top Panel Features continued...
Owner’s Manual
5. Line / Hi-Z Switches [Chs. and 2]
To connect a guitar directly to SRM-Flex without
using a DI Box, move the switch to the right first –
guitar icon – then connect the output from the guitar
to the channel’s /4" TRS input. The input impedance
is optimized for direct connection and high-frequency
fidelity is assured.
When the switch is to the lef, the channel’s /4" TRS
input becomes a line input just like any other mono line
input.
Without a DI box – or if this switch is not to the right
– guitars may sound dull and muddy.
HI
13
HI
18
17
LOW
12
LOW
EQ RVB
15
19
14
11
10
SIG/OL SIG/OL
7
5
9
8
6 20
6. /4" Stereo Line Inputs [Ch. 3/4]
The stereo line inputs are designed for /4" TRS
balanced or /4" TS unbalanced signals. They may
accept any line-level instrument, eects device,
CD player, etc.
8. /8" Stereo Line Input [Ch. 5/6]
The /8" stereo line input channel may accept
an /8" line-level signal from a phone, tablet,
MP3 player, or other signal source.
NEVER connect the output of an amplifier
directly to this input jack. This could damage
the input circuitry.
A Bluetooth connection and /8" line-level
connection may NOT be used simultaneously.
If there is a physical connection to the /8"
input, it will take priority over any Bluetooth
connection. For example, if you are playing a song
from a phone (connected via Bluetooth) and connect
an MP3 player to the /8" jack, the phone song will be
interrupted and the MP3 player now takes precedence.
9. Bluetooth Button [Ch. 5/6]
In lieu of the /8" stereo line input, channel 5/6
may accept a Bluetooth [stereo audio streaming]
signal from a phone, tablet, MP3 player, or other
signal source.
To enter pairing mode, press the Bluetooth
button on SRM-Flex. The button LED
will illuminate and flash yellow while
in pairing mode. While SRM-Flex is in pairing mode,
simultaneously scan for Bluetooth devices on your
phone/tablet. You should see SRM-Flex appear
in the “available devices” list. Select it by tapping
“SRM-Flex”. From there, your device should indicate
that it is successfully connected. Additionally, the
Bluetooth LED will illuminate solid yellow to indicate
success! If it does not, start the pairing process again,
and make sure that SRM-Flex and your device are both
in pairing mode at the same time.
When the SRM-Flex is turned o, it will
recall the Bluetooth connection when
powered back up. No need to re-pair!
If you are connecting a mono source, use the lef
(mono) input, and the mono signals will appear
on both sides of the main mix.
7. Sig / OL LEDs
This dual-colored LED will illuminate green when
the channel’s input signal is present, indicating signal.
It will remain lit so long as there is signal above
–20 dBu present in that channel.
This dual-colored LED will illuminate red when the
channel’s input signal is too high, indicating a signal
overload. This should be avoided, as distortion will
occur. If the OL LED comes on regularly, check that
the volume knob is set correctly for the input device.
The signal is at –3 dB before hard clip begins.
If a device is paired and the Bluetooth
button is pushed and held, it will drop
the current connection and go back
into pairing mode.
The Bluetooth may disconnect when
aected by Electrostatic Discharge [ESD].
Manually reconnect the Bluetooth
connection.
Owner’s Manual
11
SRM-Flex: Top Panel Features continued...
0. Volume Knobs
The endless rotary volume knobs adjust the channel’s
relative volume to the master bus. This allows signals
from the outside world to be adjusted to run through
each channel at optimal internal operating levels.
The main meters will display the input signal level
(for that channel) as the knob is turned. The main
meters will display the output level afer five seconds
of inactivity.
While the knobs may rotate endlessly,
there are high and low parameters. In other
words, you can’t keep cranking the input
level past max – there is no “beyond max”.
It also will not wrap around back to o and vice-versa.
• Channels -4: –
• Bluetooth: – dB (o) to +0.0 dB (max)
These knobs also act like momentary switches
with three possibilities:
SRM-Flex Portable Column PA System
• Push down and release to see the current input level.
• Push down and release three times quickly to zero
out the current input level.
• Push down and hold for two seconds to see the peak
input level.
HI
13
dB (o) to +6.0 dB (max)
HI
18
17
LOW
12
LOW
EQ RVB
15
11
10
. Reverb Send Knobs [Chs. and 2]
These endless rotary reverb send knobs allow
you to select the amount of reverb you would like
to add per channel.
The main meters will display the reverb level (for that
channel) as the knob is turned. The main meters will
display the output level afer five seconds of inactivity.
19
14
These knobs also act like momentary switches
with two possibilities:
• Push down and release to see the current reverb
level.
• Push down and release three times quickly to zero
out the current reverb level.
Don’t hear any reverb? Make sure
it’s turned on either via the SRM-Flex
or SRM-Flex Connect app.
Channel Equalization (EQ)
Channels and 2 have 2-band EQ with shelving hi
and shelving low
— low shelving at 90 Hz and high
shelving at 6.0 kHz. “Shelving” means that the
circuitry boosts or cuts all frequencies past the
specified frequency. For example, maxing the low EQ
to 5 dB boosts bass starting at 90 Hz and continuing
down to the lowest note you never heard and 6.0 kHz
on up boosts the treble in the case of the high EQ
With too much EQ, you can really upset
things. We’ve designed a lot of boost and cut
into the equalizer circuit because we know
that everyone will occasionally need that. But if you
max the EQ, you’ll likely get mix mush. Equalize subtly
and use cut as well as boost. If you find yourself repeatedly using a lot of boost or cut, consider altering the
sound source, such as placing a mic dierently,
trying a dierent kind of mic, a dierent vocalist,
changing the strings, or gargling.
.
2 and 3. Low and Hi EQ Knobs [Chs. and 2]
These endless rotary EQ knobs allow you to boost
and cut EQ to channels and 2.
The main meters will display the EQ boost / cut
(for that channel) as the knob is turned, with the
center LED being 0 dB (flat). The main meters will
display the output level afer five seconds of inactivity.
While the knobs may rotate endlessly,
there are high and low parameters.
In other words, you can’t keep cranking
the EQ levels past max – there is no
“beyond max”. It also will not wrap around back
to –5 dB and vice-versa.
12
While the knobs may rotate endlessly,
there are high and low parameters. In other
words, you can’t keep cranking the reverb
level past max – there is no “beyond max”.
It also will not wrap around back to o and vice-versa.
• Reverb levels: 0% (o) to 00% (max)
SRM-Flex Portable Column PA System
• Low EQ: –5 dB (cut) to +5 dB (boost) at 90 Hz
This frequency represents the punch in bass drums,
bass guitar, fat synth patches, and some really serious
male singers who eat raw beef for breakfast.
• Hi EQ: –5 dB (cut) to +5 dB (boost) at 6 kHz
Use it to add sizzle to cymbals, an overall sense
of transparency, or an edge to keyboards, vocals,
guitar and bacon frying. Turn it down a little
to reduce sibilance or to mask tape hiss.
SRM-Flex: Top Panel Features continued...
These knobs also act like momentary switches
with three possibilities:
Owner’s Manual
• Push down and release to see the current EQ
boost / cut.
• Push down and release three times quickly
to center (0 dB) the current EQ.
• Push down and hold for two seconds to see the peak
input level.
4. Reverb Button
Are you interested in adding some reverb
to the signal? It can’t be more straighforward.
Simply press this button repeatedly until the reverb
you want illuminates white.
• O [default] – No reverb
• – Small room
• 2 – Medium room
• 3 – Large room
Setting reverb levels is discussed on the previous
page, call-out number .
18
17
19
EQ RVB
15 14
TELEPATHY
16
INTANGIBILITY
SUPER
SPEED
6. Super Power Button
This button allows you to select from a wide variety
of super powers. Simply press this button repeatedly
until the super power you want illuminates white.
TIME
TRAVEL
SUPER
POWER
INVISIBILITY
FLIGHT
TELEPORTING
SUPER
STRENGTH
5. Speaker Mode Button
Speaker mode allows you to change the SRM-Flex’s
speaker voicing to tailor it to best suit your particular
application. Simply press this button repeatedly until
the EQ mode you want illuminates white.
The three speaker modes are as follows:
• Music [Default] – This mode is full range,
but focuses on increased bass and brilliant high
frequencies. This is the place to start for most music
playback applications.
• Speech – This mode features a significant low
frequency roll-o to get rid of unwanted thumps.
It also adds boost and sparkle to mid-range and high
frequencies, critical for speech applications.
This plug-and-play mode is perfect for larger venue
applications where speech is the primary audio
source in need of clear and precise intelligibility.
• Live – This mode is flat, perfect
for singer-songwriters and other live performers.
The eight super powers to choose from are as follows:
• Telepathy [Default] – Mentally receive and transmit
thoughts and other information.
• Time Travel – Travel to another time (in the past
or future).
• Flight – Fly without the need for wings, propulsion
or other outside influence.
• Teleportation – Move from one spot to another
instantly.
• Super Strength – Have strength beyond the norm.
Way, way, way beyond the norm.
• Invisibility – Move about without being seen
by the naked eye.
• Super Speed – Have speed beyond the norm.
Way, way, way beyond the norm.
• Intangibility – Pass through physical matter;
i.e. walk through walls.
Having a super power is a privilege, not
a right, and thus must only be used for
good. If not... well, you don’t want to know
what happens if it’s not used for good.
While only one super power may be
selected at a time, we are currently
updating the firmware and working
on sofware updates so you have
the ability to use multiple super powers
simultaneously. How about that?!
Owner’s Manual
13
SRM-Flex: Top Panel Features continued...
7. Master Volume Knob
The endless rotary master volume knob allows
you to adjust the overall output level. This gives
you the ultimate feeling of power and control over
the sound level sent to your audience. Adjust this
control carefully, with your good eye on the meters
to check against overloading, and your good ear
to the levels to make sure your audience (if any)
is happy.
The main meters will display the output signal level
as the knob is turned and return to bouncing meters
afer five seconds of inactivity.
While the knobs may rotate endlessly,
there are high and low parameters. In other
words, you can’t keep cranking the output
level past max – there is no “beyond max”.
It also will not wrap around back to o and vice-versa.
• Output Level: –
SRM-Flex Portable Column PA System
This knob also acts like a momentary switch
with three possibilities:
• Push down and release to see the current output
level.
• Push down and release three times quickly to zero
out the current output level (thereby killing the sound)!
• Push down and hold for two seconds to switch
between bouncing meters (peak meter mode)
and a solid bar (volume level).
dB (o) to +0.0 dB (max)
9. Limiter LED
SRM-Flex has a built-in limiter that helps to prevent
the amplifier outputs from clipping or overdriving
the transducers. The limiter indicator illuminates red
when the limiter is activated. It’s okay for it to blink
red occasionally, but if it blinks frequently or lights
continuously, turn down the volume knob(s) until
it only blinks occasionally.
Excessive limiting may lead to overheating,
which in turn trips the thermal protect
circuitry and interrupts the performance.
See ‘Thermal Protection’ on the next page for more
information.
20. Mix Out
This is a balanced male XLR-type connector that
produces a mono-summed post-DSP mix – afer
channel EQ and reverb, but pre-main fader, speaker
EQ and limiting – from all input jacks. Use it to connect
a Mackie loudspeaker o of the same signal source.
It is wired as follows, according to standards
specified by the AES (Audio Engineering Society):
Balanced XLR Output Connector
Pin – Shield (ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
8. Main Meters
These meters are made up of a single horizontal
row of 7 green LEDs and are used to gauge the input
and output levels, as well as display the reverb send
levels and EQ boost / cut.
You can get a good mix with peaks flashing anywhere
shy of the far right 3-4 LED bars. SRM-Flex will sound
muddy and distorted if all meter LEDs are illuminated
constantly. Turn down the master volume knob.
Remember, audio meters are just tools to help assure
you that your levels are “in the ballpark.” You don’t have
to stare at them (unless you want to).
SHIELD
COLD
3
HOT
1
2
1
3
2
SHIELD
COLD
HOT
14
SRM-Flex Portable Column PA System
Protection Circuitry
Owner’s Manual
AC Power
SRM-Flex employs a built-in limiter for less distortion
at peak levels. A dynamic bass response circuit
provides optimal low frequency response regardless
of overall output level. Additional protection includes
automatic thermal shutdown should the amp overheat.
However, with Class-D amp technology, which
is highly-ecient, this should never be a problem.
The protection circuits are designed
to protect the SRM-Flex under reasonable
and sensible conditions. Should you choose
to ignore the warning signs [e.g. excessive distortion],
you can still damage the speaker by overdriving it past
the point of amplifier clipping. Such damage is beyond
the scope of the warranty.
Limiting
The driver has its own compression circuit which
helps protect it from damaging transient peaks.
The compressor is designed to be transparent and
is not noticeable under normal operating conditions.
Be sure the SRM-Flex is plugged into an outlet
that is able to supply the correct voltage specified
for your model. It will continue to operate at lower
voltages, but will not reach full power. Be sure
the electrical service can supply enough amperage
for all the components connected to it.
We recommend that a sti (robust) supply of AC
power be used because the amplifiers place high
current demands on the AC line. The more power that
is available on the line, the louder the speakers will play
and the more peak output power will be available for
a cleaner, punchier bass. A suspected problem of “poor
bass performance” is ofen caused by a weak AC supply
to the amplifiers.
Never remove the ground pin on
the power cord or any other component
of the SRM-Flex. This is very dangerous.
Care and Maintenance
Overexcursion Protection
A subsonic filter circuit just prior to the power
amplifier prevents ultra-low frequencies from being
amplified. Excessive low-frequency energy can damage
the woofer by causing it to “bottom out,” also know
as overexcursion, which is equivalent to a mechanical
form of clipping.
Thermal Protection
All amplifiers produce heat. SRM-Flex is designed
to be ecient both electrically and thermally. In the
unlikely event of the amplifier overheating, a built-in
thermal switch will activate, muting the signal.
When the amplifier has cooled down to a safe
operating temperature, the thermal switch resets
itself, and the SRM-Flex resumes normal operation.
If the thermal switch activates, try turning
down the level control(s) a notch or two to avoid
overheating the amplifier. Be aware that direct
sunlight and/or hot stage lights may be the culprit
of an amplifier overheating.
Your SRM-Flex will provide many years of reliable
service if you follow these guidelines:
• Avoid exposing the SRM-Flex to moisture.
If it is set up outdoors, be sure it is under cover
if rain is expected.
• Avoid exposure to extreme cold (below freezing
temperatures). If you must operate the SRM-Flex
in a cold environment, warm up the voice coils slowly
by sending a low-level signal through them for about
5 minutes prior to high-power operation.
• Use a dry cloth to clean the cabinets. Only
do this when the power is turned o. Avoid getting
moisture into any of the openings of the cabinet,
particularly where the drivers are located.
Owner’s Manual
15
Placement
SRM-Flex is designed to sit on the floor or stage
as the main PA.
NEVER attempt to suspend an SRM-Flex
by its handle.
Check to make sure that the support surface
(e.g. floor, etc.) has the necessary mechanical
characteristics to support the weight of the SRM-Flex.
As with any powered component, protect it from
moisture. Avoid installing the SRM-Flex in places
exposed to harsh weather conditions. If you are
setting it up outdoors, make sure it is under cover
if you expect rain.
Room Acoustics
SRM-Flex is designed to sound fantastic in nearly
every application.
SRM-Flex Portable Column PA System
But, room acoustics play a crucial role in the overall
performance of a sound system. However, the wide
high-frequency dispersion of SRM-Flex helps
to minimize the problems that typically arise.
Here are some additional placement tips to help
overcome some typical room problems that might arise:
• Placing SRM-Flex in the corner of a room increases
the low frequency output and can cause the sound
to be muddy and indistinct.
• Placing SRM-Flex against a wall increases the low
frequency output, though not as much as corner
placement. However, this is a good way to reinforce
the low frequencies, if so desired.
• Avoid placing SRM-Flex directly on a hollow
stage floor. A hollow stage can resonate at certain
frequencies, causing peaks and dips in the frequency
response of the room. It is better to place them
on a sturdy stand designed to handle the weight.
• Position the SRM-Flex so the high-frequency
drivers are two to four feet above ear level for
the audience (making allowances for an audience
that may be standing/dancing in the aisles).
High frequencies are highly directional and tend
to be absorbed much easier than lower frequencies.
By providing direct line-of-sight from SRM-Flex
to the audience, you increase the overall brightness
and intelligibility of the sound system.
• Highly reverberant rooms, like many gymnasiums
and auditoriums, are a nightmare for sound system
intelligibility. Multiple reflections o the hard walls,
ceiling, and floor play havoc with the sound. Depending
on the situation, you may be able to take some steps
to minimize the reflections, such as putting carpeting
on the floors, closing draperies to cover large glass
windows, or hanging tapestries or other materials
on the walls to absorb some of the sound.
However, in most cases, these remedies are not
possible or practical. So what do you do? Making
the sound system louder generally doesn’t work
because the reflections become louder, too.
The best approach is to provide as much direct sound
coverage to the audience as possible. The farther away
you are from the speaker, the more prominent will be
the reflected sound.
Keep in mind that the speaker mode is another great
way to compensate for some of these issues. See page
3 for more information.
16
SRM-Flex Portable Column PA System
Appendix A: Service Information
Owner’s Manual
If you think your SRM-Flex has a problem, please check
out the following troubleshooting tips and do your best
to confirm the problem. Visit the Support section of our
website (www.mackie.com/support) where you will find
lots of useful information such as FAQs and other
documentation. You may find the answer to the problem
without having to part with your SRM-Flex.
Troubleshooting
No power
• Our favorite question: Is it plugged in? Make sure
the AC outlet is live [check with a tester or lamp].
• Our next favorite question: Is the power switch on?
If not, try turning it on.
• Make sure the line cord is securely seated in the line
cord socket and plugged all the way into the AC outlet.
• Are the power LEDs on the top and front panels
illuminated? If not, make sure the AC outlet is live.
If so, refer to “No sound” below.
• The internal AC line fuse may be blown. This is not
a user serviceable part. If you suspect the AC line
fuse is blown, please see the "Repair" section next.
No sound
• Is the level knob for the input source turned all
the way down? Verify that all the volume controls
in the system are properly adjusted. Look at the
sig/OL LED and meters to ensure that SRM-Flex
is receiving a signal.
• Is the signal source working? Make sure
the connecting cables are in good repair and securely
connected at both ends. Make sure the master volume
level is turned up suciently to drive the inputs
of the speaker.
Poor sound
• Is it loud and distorted? Make sure that you’re not
overdriving a stage in the signal chain. Verify that
all level controls are set properly.
• Is the input connector plugged completely into
the jack? Be sure all connections are secure.
Noise
• Make sure all connections to SRM-Flex are good
and sound.
• Make sure none of the signal cables are routed near
AC cables, power transformers, or other EMI-inducing
devices.
• Is there a light dimmer or other SCR-based device
on the same AC circuit as SRM-Flex? Use an AC line
filter or plug it into a dierent AC circuit.
Hum
• Try disconnecting the cable connected to the input
jack. If the noise disappears, it could be a “ground
loop,” rather than a problem with SRM-Flex.
Try some of the following troubleshooting ideas:
• Use balanced connections throughout your
system for the best noise rejection.
• Whenever possible, plug all the audio
equipment’s line cords into outlets which share
a common ground. The distance between
the outlets and the common ground should
be as short as possible.
Other Issues
• Please email or call Technical Support if you
are having any other issue not listed here:
o mackie.com/support-contact
o -800-898-32
Repair
• Make sure the input source is not muted or has
a processor loop engaged. If you find something
like this, make sure the level is turned down before
disengaging the oending switch.
• Has it shut down? Make sure there is at least six
inches of free space behind each SRM-Flex.
For warranty service, refer to the warranty information
on page 2.
Non-warranty service is available at a factory-authorized
service center. To locate the nearest service center, visit
www.mackie.com/support/service-locator. Service
for an SRM-Flex living outside the United States
may be obtained through local dealers or distributors.
If you do not have access to our website, please call
our Tech Support department at -800-898-32 (normal
business hours, Pacific Time), to explain the problem.
They will tell you where the nearest factory-authorized
service center is located in your area.
Owner’s Manual
17
Appendix B: Technical Information
SRM-Flex Specifications
Acoustic Performance
Frequency Range (–0 dB): 40 Hz – 20 kHz
Frequency Range (–3 dB): 50 Hz – 20 kHz
Horizontal Coverage: 90º
Vertical Coverage: 50º
Maximum SPL Peak: 8 dB
Transducers
Low Frequency: 0 in / 254 mm
High Frequency: 6x 2.0 in / 5 mm
silk dome tweeters
SRM-Flex Portable Column PA System
Power Amplifiers
System Power Amplification
Rated Power 300 watts peak
Low Frequency Power Amplifier
Rated Power: 000 watts peak
Rated THD < %
Cooling Active
Design: Class D
High Frequency Power Amplifier
Rated Power: 300 watts peak
Rated THD < %
Cooling Active
Design: Class D
System Processing
Voicing 3 speaker modes
Reverb O, (short),
2 (medium), 3 (long)
Equalization
Low +5 / –5 dB @ 90 Hz
High +5 / –5 dB @ 6.0 kHz
with ferrite
Bluetooth Information
Bluetooth Protocol: 4.2
Bluetooth Function: Audio Streaming and
User Interface Control
Bluetooth Class: Class
Crossover Point
Crossover Frequency: 600 Hz (8 dB Butterworth)
Line Input Power
Detachable line cord ~00 – 240VAC, 50 – 60 Hz, 0W
AC Connector 3-pin IEC 250VAC, 0 A male
Power Supply Type Switchmode
Safety Features
Input Protection Peak and RMS limiting,
power supply and amplifier
thermal protection
Status Info Input and output levels, reverb levels,
sig / OL, EQ settings, speaker mode
Construction Features
Basic Design: Asymmetrical
Enclosure Material: Polypropylene
Enclosure Finish: Black Polyurea
Grille Material: Perforated steel
Grille Finish: Powder-coated black
Handles: One on the top panel
of the base station
Display LEDs
Front: Defeatable power
Top: Power, Limiter, Bluetooth
Operating Temperature: 0 – 40 ˚C
32 – 04 ˚F
18
Input/Output
Input Type: 2x Female XLR Balanced
4x /4" Balanced / Unbalanced
/8" Stereo
Mic-Line Impedance: 8 k
/4" Hi-Z Impedance: M
Mix Out: Male XLR Balanced
Mix Out Impedance: 600
balanced
unbalanced
balanced
SRM-Flex Portable Column PA System
SRM-Flex Specifications continued...
Owner’s Manual
Physical Properties
Base Station:
Height: 7.0 in / 432 mm
Width: 3.0 in / 330 mm
Depth: 4.2 in / 36 mm
High Frequency Section:
Height (each): 22.5 in / 572 mm
Height (total): 67.5 in / 75 mm
Height (total w/base): 79.0 in / 2007 mm
Width: 2.8 in / 7 mm
Depth: 3.0 in / 76 mm
Weight (total): 29.6 lb / 3.4 kg
SRM-Flex Dimensions
DIMENSIONS
Accessories (Included)
SRM-Flex Carry and Cover Kit P/N 205980-00
Disclaimer
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.
The “Running Man” figure is a registered trademark of LOUD
Audio, LLC.
All other brand names mentioned are trademarks or registered
trademarks of their respective holders, and are hereby
acknowledged.
©209 LOUD Audio, LLC.
All Rights Reserved.
2.8
71 mm
3.0 in
76 mm
WEIGHT
29.6 lb
13.4 kg
79.0 in
2007 mm
13.0 in
330 mm
22.5 in
572 mm
17.0 in
432 mm
14.2 in
361 mm
Owner’s Manual
19
SRM-Flex Block Diagram
SRM-Flex Portable Column PA System
DAC
Hi
Amp
DAC
Limiter
Crossover
Speaker Processing
Lo
Amp
DAC
DAC
DSP
Main
ADC
ADC
Volume
Reverb
User EQ
ADC
Volume
Reverb
User EQ
Master
Volume
Mode
Voicing
ADC
Volume
Volume
ADC
20
Channel 1
SRM-Flex Portable Column PA System
Channel 2
Channels 3/4
Channels 5/6
Limited Warranty
Please keep your sales receipt in a safe place.
This Limited Product Warranty (“Product Warranty”) is provided by LOUD Audio, LLC (“LOUD”) and is applicable to products
purchased in the United States or Canada through a LOUD-authorized reseller or dealer. The Product Warranty will not extend
to anyone other than the original purchaser of the product (hereinafer, “Customer,” “you” or “your”).
For products purchased outside the U.S. or Canada, please visit www.mackie.com to find contact information for your local
distributor, and information on any warranty coverage provided by the distributor in your local market.
LOUD warrants to Customer that the product will be free from defects in materials and workmanship under normal use
during the Warranty Period. If the product fails to conform to the warranty then LOUD or its authorized service representative
will at its option, either repair or replace any such nonconforming product, provided that Customer gives notice of the
noncompliance within the Warranty Period to the Company at: www.mackie.com or by calling LOUD technical support
at .800.898.32 (toll-free in the U.S. and Canada) during normal business hours Pacific Time, excluding weekends
or LOUD holidays. Please retain the original dated sales receipt as evidence of the date of purchase. You will need it
to obtain any warranty service.
For full terms and conditions, as well as the specific duration of the Warranty for this product, please visit www.mackie.com.
Owner’s Manual
The Product Warranty, together with your invoice or receipt, and the terms and conditions located at www.mackie.com
constitutes the entire agreement, and supersedes any and all prior agreements between LOUD and Customer related
to the subject matter hereof. No amendment, modification or waiver of any of the provisions of this Product Warranty
will be valid unless set forth in a written instrument signed by the party to be bound thereby.
Need help with the SRM-Flex?
• Visit www.mackie.com/support to find: FAQs, manuals, addendums, and other documents.
• Email us at: www.mackie.com/support-contact
• Telephone 1-800-898-3211 to speak with one of our splendid technical support chaps
(Monday through Friday, normal business hours, Pacific Time).
Owner’s Manual
21
9820 North Creek Parkway #20
Bothell, WA 980 • USA
Phone: 425.487.4333
Toll-free: 800.898.32
Fax: 425.487.4337
www.mackie.com
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