SRM350 2-Way Active Loudspeaker User's Manual INTRODUCTION Thank you for choosing LOUD Technologies’ Mackie active sound reinforcement speakers. The SRM350 is an active two-way loud-speaker

SRM350 2-WAYACTIVE LOUDSPEAKERUSER’S MANUAL

2

CAUTION AVISRISK OF ELECTRIC SHOCK

DO NOT OPENRISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCKDO NOT REMOVE COVER (OR BACK)

NO USER-SERVICEABLE PARTS INSIDEREFER SERVICING TO QUALIFIED PERSONNEL

ATTENTION: POUR EVITER LES RISQUES DE CHOCELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN

ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIERL'ENTRETIEN AU PERSONNEL QUALIFIE.

AVIS: POUR EVITER LES RISQUES D'INCENDIE OUD'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE

A LA PLUIE OU A L'HUMIDITE

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated"dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral est utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de "voltage dangereux" non isolé d'ampleur suffisante pour constituer un risque d'éléctrocution.

The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé pour alerter les utilisateurs de la présence d'instructions importantes pour le fonctionnement et l'entretien (service) dans le livret d'instruction accompagnant l'appareil.

13. Unplug this apparatus during lightning storms or when unused forlong periods of time.

14. Refer all servicing to qualified service personnel. Servicing isrequired when the apparatus has been damaged in any way, such aspower-supply cord or plug is damaged, liquid has been spilled or objectshave fallen into the apparatus, the apparatus has been exposed to rainor moisture, does not operate normally, or has been dropped.

15. This apparatus shall not be exposed to dripping or splashing, and noobject filled with liquids, such as vases, shall be placed on the apparatus.

16. This apparatus has been designed with Class-I construction andmust be connected to a mains socket outlet with a protective earthingconnection (the third grounding prong).

17. This apparatus has been equipped with an all-pole, rocker-style ACmains power switch. This switch is located on the rear panel and shouldremain readily accessible to the user.

18. This apparatus does not exceed the Class A/Class B (whichever isapplicable) limits for radio noise emissions from digital apparatus as setout in the radio interference regulations of the Canadian Department ofCommunications.

ATTENTION — Le présent appareil numérique n’émet pas de bruitsradioélectriques dépassant las limites applicables aux appareilsnumériques de class A/de class B (selon le cas) prescrites dans leréglement sur le brouillage radioélectrique édicté par les ministere descommunications du Canada.

19. Exposure to extremely high noise levels may cause permanenthearing loss. Individuals vary considerably in susceptibility to noise-inducedhearing loss, but nearly everyone will lose some hearing if exposed tosufficiently intense noise for a period of time. The U.S. Government’sOccupational Safety and Health Administration (OSHA) has specified thepermissible noise level exposures shown in the following chart.

IMPORTANT SAFETY INSTRUCTIONS1. 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 dry cloth.

7. Do not block any ventilation openings. Install in accordance with themanufacturer’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-typeplug. A polarized plug has two blades with one wider than the other. Agrounding-type plug has two blades and a third grounding prong. Thewide blade or the third prong are provided for your safety. If theprovided plug does not fit into your outlet, consult an electrician forreplacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinchedparticularly at plugs, convenience receptacles, and the point where theyexit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with a cart, stand, tripod, bracket, or table specified bythe manufacturer, or sold with the apparatus. When a cart is used, usecaution when moving the cart/apparatus combination to avoid injuryfrom tip-over.

PORTABLE CART WARNING

Carts and stands - TheComponent should be usedonly with a cart or standthat is recommended bythe manufacturer.A Component and cartcombination should bemoved with care. Quickstops, excessive force, anduneven surfaces may causethe Component and cartcombination to overturn.

WARNING — To reduce the risk of fire or electricshock, do not expose this appliance to rain or moisture.

3Part No. 0008034-90 Rev. C 09/05©2003-2005 LOUD Technologies Inc. All Rights Reserved.

Lend Me Your EarsExposure to extremelyhigh noise levels maycause permanent hear-ing loss. Individuals vary

considerably in susceptibility to noise-in-duced hearing loss, but nearly everyone willlose some hearing if exposed to sufficientlyintense noise for a period of time. The U.S.Government’s Occupational Safety andHealth Administration (OSHA) has speci-fied the permissible noise level exposuresshown in this chart.

According to OSHA, any exposure inexcess of these permissible limits couldresult in some hearing loss. To ensureagainst potentially dangerous exposure tohigh sound-pressure levels, it is recommend-ed that all persons exposed to equipmentcapable of producing these levels use hearingprotectors while this unit is in operation.Ear plugs or protectors in the ear canals orover the ears must be worn when operatingthis amplification system in order to preventa permanent hearing loss if exposure is inexcess of the limits set forth here.

Duration Per Day Sound Level dBA, Typical In Hours Slow Response Example

8 90 Duo in small club6 924 95 Subway Train3 972 100 Very loud classical music

1.5 1021 105 Tami screaming at Adrian about deadlines

0.5 110 0.25 or less 115 Loudest parts at a rock concert

CONTENTSIMPORTANT SAFETY INSTRUCTIONS ..................... 2INTRODUCTION....................................................... 4HOOKUP DIAGRAMS............................................... 6

Quick Start ........................................................ 6REAR PANEL DESCRIPTION .................................... 8

IEC Socket .................................................. 8 POWER Switch ............................................ 8 POWER Indicator ......................................... 8 CONTOUR .................................................. 8 LEVEL ......................................................... 8 MIC/LINE Switch ......................................... 9 SIGNAL Indicator ........................................ 9 LIMIT Indicator ............................................ 9 INPUT Connector ........................................ 9 THRU Connector ......................................... 9 Accessory Plate .......................................... 9

CONNECTIONS...................................................... 10PLACEMENT .......................................................... 10THERMAL CONSIDERATIONS ................................ 12AC POWER CONSIDERATIONS .............................. 12SERVICE INFORMATION ........................................ 14

Warranty Service ............................................. 14Troubleshooting ............................................... 14Repair ............................................................. 16

CARE AND MAINTENANCE.................................... 16SRM350 SPECIFICATIONS ..................................... 17SRM350 BLOCK DIAGRAM .................................... 18SRM350 LIMITED WARRANTY ............................... 19

Don’t forget to visit our website at www.mackie.comfor more information about these and other Mackie products.

The SRM350can produce amaximum SPLof 121 dB @ 1m.

R

http://www.mackie.com

4

INTRODUCTIONThank you for choosing LOUD Technologies’

Mackie active sound reinforcement speakers.The SRM350 is an active two-way loud-

speaker capable of extremely high soundpressure levels, and designed to give you thebest performance of any loudspeaker in itsclass and price range.

When we designed the SRM350s oldersibling, the SRM450, our goal was to builda sound reinforcement speaker with thesame fidelity and precision found in our re-knowned HR824 studio monitors.Apparently, people liked what they heard.Now, our goal for the SRM350 is to makethe sound even better with improved activeelectronics, but delivered in a more compactsize. We think you’ll agree that the SRM350sound quality and accuracy reaches thisgoal and more. The result is a compactsound reinforcement system equally athome in a concert setting, in the studio, im-promptu concerts on the studio roof, in thecinema, or in a home theater.

The Transducers

The SRM350 active speakers feature a 10˝high-power low-frequency woofer and a 1.4˝titanium diaphragm high-output precisioncompression driver. This high- frequencydriver is mounted on an acoustically non-resonant exponential waveguide, providinga wide, controlled dispersion and precise re-production of the critical upper mid-rangeand high frequencies. The result is an unbe-lievably smooth off-axis response thatallows everyone in the audience to experi-ence the same high-resolution audio nomatter where they are seated.

Each driver has been specifically designedby our engineers for optimum performancein the lightweight high-strength cabinet.

Power Amplifiers

To power these beautiful things, eachSRM350 includes two power amplifiers.They include the following features:• The low-frequency amplifier produces

165 continuous watts before clipping.• The high-frequency amplifier produces

30 continuous watts before clipping.• Both amplifiers are a Class H design,

which uses a dual power supply forimproved power and thermal efficiency.The amplifiers operate on the lowervoltage rails until the signal requiresmore power, at which point the highvoltage rails seamlessly kick in toprovide additional power.

• An Active Protection ManagementSystem monitors the output levels fromboth amplifiers as well as the operatingtemperature of the amplifiers. When theoutput from either amplifier begins toclip, a limiter gently reduces the inputsignal level until the output is no longerclipping. Likewise, if the temperature ofeither of the amplifers begins to exceeda safe operating level, the input signal iselegantly adjusted to keep the tempera-ture at a desired operating level.

• The low-frequency amplifier also has aDynamic Bass Boost circuit. Our earsare more sensitive to bass frequencies athigh volume levels than at softer vol-umes. This unique circuit automaticallyreduces the low frequencies below 70Hz as the volume of the speakers goesup. This results in improved efficiencyfor the low-frequency amplifier becauseit is not wasting power trying to repro-duce frequencies we hear better at loudvolumes. Instead, the power is used forthe frequencies where it is needed,resulting in a louder sound.

Warning: Although theamplifiers have theseprotection circuits, youmust still make sure theLIMIT light is not blink-

ing continuously. If it is, turn down yourmixer faders, or preamplifier gain, or turndown the SRM350 LEVEL control.

5

The Crossover

The built-in electronic crossover is a24 dB/octave Linkwitz-Riley design. Althoughmore expensive than other crossover designs,the benefits provided by the Linkwitz-Rileydesign have been well documented. Thesebenefits include:• Absolutely flat frequency response

throughout the bandpass, without thecharacteristic ripple near the crossoverpoint exhibited by other designs.

• The sharp 24 dB per octave roll-off ofthe filters ensures that the transducersaren’t reproducing frequencies outsideof their capabilities.

• The acoustic sum of the two driverresponses is unity at the crossoverfrequency, resulting in perfect powerresponse.

• Our heroic engineers have workedcarefully to ensure that the SRM350also provides perfect phase response.This diligence has yielded phenomenalaccuracy, even if you are standing 20feet away.

The CabinetThe SRM350 cabinet was designed to be

the strongest molded composite cabinet onthe planet. This material is as strong as con-crete, and rigid enough to prevent unwantedvibrations in the cabinet. An optionalbracket kit is available for the top and bot-tom of the cabinet to be used for flying, anda socket is provided in the bottom of thecabinet for mounting on a tripod stand.Although it is an exceptional choice for in-stalled sound situations, its light weight anddurable finish also make it ideal for portablesound system use. The asymmetrical trap-ezoidal design of the cabinet makes it easyto use as a floor wedge for stage monitorapplications.

The Active AdvantageThere are a number of advantages to us-

ing an active speaker system over a passiveloudspeaker:• The internal crossover is active, and its

low power circuitry operates on line-level signals. It does not wastespeaker-level power like a passivecrossover with large coils, caps, andresistors.

• The input signals are crossed overbefore they reach the amplifiers, so eachamplifier only receives the correctfrequency range for its driver.

• The amplifiers are designed specificallyfor these speaker load impedances.There is no guesswork as to what loadeach amplifier has to drive, so they canprovide maximum acoustic output fromthe speakers, yet minimize the danger ofspeaker damage due to overdriving alesser amplifier.

• The connecting wires between theamplifier outputs and the drivers arekept to a minimum, so the dampingfactor of the amplifier isn’t compro-mised by the resistance of long speakercables. In addition, all the power fromthe amplifier is transferred directly tothe drivers with no speaker cable losses.

• The acoustic sum of the outputs fromthe two drivers is optimized electroni-cally, as well as physically, so theamplitude response is flat and there isno lobing error.

• The presence of active circuits withinthe speaker cabinet allow the designerto add on extra details, such as a highquality mic/line input section andoptional accessory modules.

In short, all the complex interconnectedcomponents in the system are designed towork in harmony with each other to pro-duce the best possible sound.

6

HOOKUP DIAGRAMSQuick Start1. Start with the following settings on the

back of the SRM350:Turn the POWER switch off (down).Set the CONTOUR and MIC/LINEswitches out. If using a microphone asthe input to the SRM350, push the MIC/LINE switch in.

WARNING: Turn theLEVEL control down(counterclockwise)before every use. If not,you could be in for a

startling surprise, especially if the lasttime you used it was with a microphoneand now you want to connect a line-level source.

2. Connect the output from your signalsource (mixing console, microphone,preamp, or other mic- or line-levelsource) directly to the INPUT connectoron the back of the SRM350. This is acombination XLR and 1/4˝ TRS con-nector, and accepts balanced orunbalanced line-level signals frommixers, preamplifiers, CD players, tapedecks, etc., with the MIC/LINE switch

out, and accepts direct connections fromdynamic microphones with the MIC/LINE switch pushed in.

3. Connect the supplied AC power cord tothe IEC socket on the back of theSRM350. Plug the other end into an ACoutlet properly configured with thecorrect voltage for your particular model.

4. Turn on your signal source. Make sure itsMaster Volume control (if it has one) isturned all the way down.

5. Turn on the SRM350 POWER switch.6. Start the signal source, whether it be

speaking into a microphone or starting aCD player. Adjust any volume controls onthe signal source for normal operation.

7. Slowly turn up the LEVEL control onthe back of the SRM350 until thedesired volume is reached (and theLIMIT light does not come on). Alwayswear hearing protectors if you are closewhen it is playing at high levels.

8. If there is no sound, always turn downthe SRM350 LEVEL control beforeinvestigating. There may be a mixer orpreamplifier mute or tape switchengaged, or a mic switch off.

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L

DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA

AND REGGIO EMILIA, ITALY.

LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)

ACTIVE SOUND REINFORCEMENT SYSTEM

ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

Mixer orPreamplifier

RightLine levelOutput

LeftLine level

Output

1202-VLZPRO

SRM350: STEREO OPERATION WITH A MIXER

7

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

Thru Thru

Next

Next

1202-VLZPRO

SRM350: DAISY-CHAINING USING THE THRU JACK

PowerCord

PowerCord

PoleMount

PoleMount

Line-levelHi-pass

out

Line-levelHi-pass

out

FullRange

FullRange

PowerCords

PowerCords

SWA1501plays the lowfrequencies

SWA1501plays the lowfrequencies

1202-VLZPRO

ACTIVEACTIVE

SRM350: BIAMPING WITH A POWERED SUBWOOFER

The SRM350 can beused with a MackieSWA1501 or SWA1801subwoofer to create anincredibly powerfulsystem.

The active crossoverinside the subwoofersplits the full range in-put signal into tworanges. The subwooferplays the low frequencyrange through its built-in amplifier and woofer,and sends the high-passrange to the SRM350.

The SRM350 can bepole mounted on top ofthe SWA1501 or 1801as shown.

8

REAR PANEL DESCRIPTION

CONTOUR

Pushing in this switch engages a filterthat provides 3 dB of boost to the low andhigh frequencies (below 100 Hz and above12 kHz). This provides a punchy, crispsound for most live music applications. Youcan experiment with this switch by leavingit out for a while, then pushing it in to de-termine which way sounds best for yourapplication. It is especially useful when lis-tening at lower volumes, as it highlights thebass like a Loudness switch, in addition toboosting the highs.

LEVELThis is used to adjust the signal level, going

into the built-in power amplifiers, from Offup to 45 dB of gain. Since the SRM350 in-corporates Mackie’s world-class low-noisemic preamp technology, you can connecteither a line-level or a microphone-levelsignal to the input, and use this control toadjust the level correctly.

There is no phantompower for a microphone,so you should use adynamic mic, or use acondensor type if it has itsown battery power.

The SRM350 has several connectors,controls, and indicators that you shouldunderstand.

IEC SocketThis is where you connect the supplied

AC linecord to provide AC power to theSRM350’s built-in power amplifiers. Plugthe linecord into an AC socket properlyconfigured for your particular model.

Note: If you happen to lose the AC line-cord, replacements are readily available atany office or computer supply store. Alwaysuse a three-pin plug with a ground pin.

POWER SwitchSwitch up to turn the SRM350 on, and

switch down to turn it off. Make sure theLEVEL control is down before you turn it on.

POWER IndicatorWhen the POWER switch is turned on,

and the linecord is connected to an activeAC Mains supply, this indicator, locatedjust above the POWER switch, glows to letyou know that you’re ready to rock androll. The cool blue LED on the front of thespeaker works in the same way.

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

9

Follow the Quick Start guide on page 6for setting the LEVEL control. For most ap-plications, it will be in the NORMALposition (12 o’clock) . If you have a particu-larly high line-level signal connected to theSRM350, you may need to turn the controldown to the 9 o’clock position. If you havea low line-level or mic-level signal con-nected, you may need to turn the LEVELcontrol up to the 3 o’clock position.

MIC/LINE SwitchLeave this switch out when connecting a

line-level signal to the INPUT connector(from a mixer, graphic EQ, or other line-level signal source).

Push this switch in when connecting amicrophone to the INPUT connector. Sincea microphone produces a much smaller sig-nal than a line-level signal, this provides anadditional 40 dB of gain to boost the micro-phone signal to a line level.

SIGNAL IndicatorThis LED illuminates whenever there is

a signal present at the INPUT connector onthe rear panel. It senses the signal just afterthe LEVEL control, so if the LEVEL controlis turned down, the SIGNAL indicatorwon’t light.

LIMIT IndicatorWhen the signal levels at the amplifier

outputs approach clipping, a soft limitingcircuit is activated that reduces the inputsignal. The LIMIT LED lights whenever thelimit circuit is active.

It’s okay for the LIMIT indicator to blinkoccasionally, but if it blinks frequently orcontinuously, either turn down the signallevel at the mixer or other signal source, orturn down the SRM350’s LEVEL control.

Wear hearing protection ifyou are close to theSRM350 playing at highlevels.

INPUT ConnectorThis is a combination female XLR-type

and 1/4˝ TRS connector that accepts a bal-anced or unbalanced mic- or line-level signal.

THRU ConnectorThis is a male XLR-type connector that

can be used to daisy-chain the input signalto another speaker.

The signal at this point is after the MIC/LINE switch but before the LEVEL control.If you have a microphone connected to thefirst SRM350 and you have the MIC/LINEswitch pushed in, the signal at the THRUjack is boosted 40 dB to a line-level, so leavethe MIC/LINE switch out on the nextSRM350.

ACCESSORY Plate

This removable plate provides access toinstall future accessory modules.

~120 VAC 60Hz 2.50A 230VA

POWER

INPUT

THRU

PA

RA

LLE

L


AND REGGIO EMILIA, ITALY. MANUFACTURED IN ITALY

LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350

LINEMIC

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

RISK OF ELECTRIC SHOCKDO NOT OPEN

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER.

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

CAUTION

10

PLACEMENTThe SRM350 active speakers are designed

to sit on the floor, a tabletop, or to fit on astandard tripod speaker stand. They can alsobe suspended by the rigging points, whichrequires installing the optional hangingbracket on the top and/or bottom of thecabinet. NEVER attempt to suspend theSRM350 active speakers by their handles.

You can lay the cabinet down on its sideand use the SRM350 as a floor monitor. Theasymmetrical trapezoidal shape of the cabinetprovides a perfect angle for aiming up towardperformers from the front of the stage.

As with any poweredcomponents, protectthem from moisture. Ifyou are setting them upoutdoors, make sure they

are under cover if you expect rain.

The SRM350 generatesmagnetic fields. Place itat least two feet (0.6meters) or more fromcomputer monitors.

Check the screen for any change in color ordistortion. Do not place any magnetic audioor video tapes or computer discs near theSRM350s.

Room AcousticsThe SRM350 active speakers are de-

signed to sound as neutral as possible; thatis, to reproduce the input signal as accu-rately as possible, monitoring the soundrather than changing it.

Room acoustics play a crucial role in theoverall performance of a sound system.However, the wide high-frequency disper-sion of the SRM350 helps to minimize theproblems that typically arise.

Balanced XLR Connectors

CONNECTIONSThe SRM350 has a combination female

XLR and 1/4˝ TRS input that accepts abalanced or unbalanced mic- or line-levelsignal. When connecting a balanced signal,be sure it’s wired per AES (Audio Engi-neering Society) standards:

XLR TRSHot (+) Pin 2 TipCold (–) Pin 3 RingShield (Ground) Pin 1 Shield

There is also a male XLR connector la-beled THRU. This allows you to connectmore than one SRM350 to the output ofyour mixing console. Simply plug the signalsource output into the first INPUT jack,and patch that speaker’s THRU jack to thenext INPUT jack, and so on, daisy-chainingmultiple speakers (see diagram on page 7).

The THRU jack’s signalcomes after the MIC/LINEswitch, but before theLEVEL control. If theMIC/LINE switch ispushed in on the first

SRM350, the signal at the THRU jack isboosted by 40 dB to a line level. Therefore,leave the MIC/LINE switch out on the fol-lowing SRM350s in the chain.

Top

900 Dispersion

up to 20 kHz

900

SLEEVE (SHIELD)

TIPSLEEVE

TIP (HOT)

RING (COLD)

RING

TIP

SLEEVERING

Balanced TRS Connectors

11

Here are some useful placement tips:• Avoid placing loudspeakers in the

corners of a room. This increases thelow-frequency output and can cause thesound to be muddy and indistinct.

• Avoid placing loudspeakers against a wall.This, too, increases the low-frequencyoutput, though not as much as cornerplacement. However, if you do need toreinforce the low frequencies, this is agood way to do it.

• Avoid placing the active speakers directlyon a hollow stage floor. A hollow stage canresonate at certain frequencies, causingpeaks and dips in the frequency responseof the room. It’s better to place the activespeakers on a sturdy table or tripod stands.

• Position the active speakers so the high-frequency drivers are 2 to 4 feet above earlevel for the audience (make allowances fora standing/dancing in the aisles audience).High frequencies are highly directional andtend to be absorbed much easier thanlower frequencies. By providing direct line-of-sight from the active speakers to theaudience, you increase the overall bright-ness and intelligibility of the sound system.

• Highly reverberant rooms, like manygymnasiums and auditoriums, are anightmare for sound system intelligibility.Multiple reflections off the hard walls,ceiling, and floor play havoc with thesound. Depending on the situation, youmay be able to take some steps to mini-mize the reflections, such as puttingcarpeting on the floors, closing draperiesto cover large glass windows, or hangingtapestries or other materials on the wallsto absorb some of the sound.However, in most cases, these remedies arenot possible or practical. So what do youdo? Making the sound system loudergenerally doesn’t work because the reflec-tions become louder, too. The best approachis to provide as much direct sound coverageto the audience as possible. The fartheraway you are from the speaker, the moreprominent will be the reflected sound.Use more speakers strategically placed sothey are closer to the back of the audience.If the distance between the front and backspeakers is more than about 100 feet, youshould use a delay processor to time-alignthe sound. (Since sound travels about 1foot per millisecond, it takes about 1/10 ofa second to travel 100 feet).

RIGGINGThe SRM350 cabinets are fitted with

four M5 insert points on the top and bot-tom for installing an optional hangingbracket that allows the speaker to be flown.SRM350 Bracket Kit: Part No. 0016404

WARNING: Never at-tempt to suspend theSRM350 active speakersby their handles. If youwant to suspend them,

use the hanging brackets only.

M5 inserts for mounting

optional hanging bracket

Bottom

PoleMountTop

If you are hanging themin an inaccessable place,such as over a lion’s cage,make sure that you firstcomplete the sound check

and set the SRM350 LEVEL correctly.

12

AC POWERCONSIDERATIONS

Be sure the SRM350 is plugged into anoutlet that is able to supply the correct volt-age specified for your model. If the voltageshould drop below 97% of the specified linevoltage, the built-in amplifiers will nolonger be able to supply rated power. (Theywill continue to operate down to 75% ofthe rated line voltage, but won’t reach fullpower, resulting in lower headroom.)

Under maximum SPL conditions, wheremusical peaks are clipping, the SRM350 120Vmodel draws 2.5 amps on average (1.3 ampsfor the 230V model). Under normal condi-tions, the current draw is below 1 amp.

We recommend that a stiff (robust) sup-ply of AC power be used because theamplifiers place high current demands onthe AC line. The more power that is avail-able on the line, the louder the speakers willplay and the more peak output power willbe available for cleaner, punchier bass. Asuspected problem of “poor bass perfor-mance” is often caused by a weak ACsupply to the amplifiers.

AC Power DistributionA 240VAC center-tapped service en-

trance transformer serves the majority ofAC outlets encountered in homes and clubs(in the U.S.). This provides two phases ofAC power on either side of the center tap,at 120V each.

If lighting is used in a show, it is prefer-able to power the lights from one leg of theservice, and power the audio equipmentfrom the other leg. This will help minimizenoise from the lights coupling into the au-dio (particularly if SCRs, or light-dimmerswitches, are used).

THERMALCONSIDERATIONS

The amplifiers inside theSRM350 are convectioncooled by a largeheatsink. For efficientcooling, it is important to

allow at least six inches of free space behindthe SRM350.

If the ambient temperature in the roomis high, it could cause the amplifiers to over-heat. In this case, you should try aiming afan at the heatsink to increase the air flowthrough the fins.

During a performance, don’t have itcranked so high that the rear panel LIMITLED is blinking frequently or lighting con-tinuously. You should turn down theLEVEL control a notch or two to avoidoverheating the amplifiers or your neighbors.

If the amplifiers begin to overheat, theActive Protection Management Systemgently reduces the input signal level untilthe amplifiers have cooled down to a safeoperating temperature.

TRANSFORMER

120V

120V

240V

HIGH VOLTAGE POWER LINE

EARTHGROUND

(NEUTRAL)

PRIMARYWINDING

SECONDARYWINDING

240V CENTER-TAPPED SECONDARY

13

Wherever possible, connect all of yourequipment to the same electrical circuit.This will help reduce the possibility of aground loop problem causing an annoyinghum in your speakers.

Low power components such as tapedecks, mixers, effects processors and CDplayers should be connected to the sameoutlet as the SRM350s. Use fused powerstrips as shown in the diagram below. Makesure that the total current draw of yourcomponents does not exceed the capabilityof the outlets and power strips.

For the US 120 V model:A maximum of five SRM350s can be

connected per 15A service.This allows each SRM350 to be safely

operated at its maximum level.

When turning your system on, turn onthe SRM350s last. This will stop any turn-on thumps and bangs from your sourceequipment being amplified.

When turning off your system, turn offthe SRM350s first. This will prevent anyturn-off thumps and bangs from yoursource equipment being amplified.

INPUT

THRU

PA

RA

LLE

L

LINEMIC~120 VAC 60Hz

2.50A 230VA

POWER



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350




CAUTION

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

INPUT

THRU

PA

RA

LLE

L

LINEMIC~120 VAC 60Hz

2.50A 230VA

POWER



LIMITSIGNAL

12k/AIR100Hz

CONTOUR(+3dB)


ON

SRM350




CAUTION

LEVEL

OO

MIC GAIN

+45

+5dB

NORMAL

When setting up for ashow, often you are plug-ging into an AC powerdistribution system youknow nothing about. Youmay even be faced with

2-wire outlets that are missing the thirdsafety ground pin. It’s a good idea to have athree-wire AC outlet tester in your toolboxso you can check the outlets yourself tomake sure they are wired correctly. Thesetesters will tell you if the polarity of the hotand neutral wires is reversed and if thesafety ground is disconnected.

Don’t use an outlet if it iswired improperly! This isto protect yourself as wellas your equipment.

Never remove the groundpin on the power cord ofthe SRM350 or any othercomponent. This is verydangerous.

SRM350: AC CONNECTIONS

14

SERVICE INFORMATIONWarranty Service

Details concerning Warranty Service arespelled out on page 19 of this manual.

If you think your loudspeaker has aproblem, please do everything you can toconfirm it before calling for service, includ-ing reading through the followingtroubleshooting section. Doing so mightsave you from being deprived of yourMackie loudspeaker.

If you do find the prob-lem, make sure that youturn down the LEVELcontrols and turn off theSRM350 before correct-

ing it or changing any connections.Of all Mackie products returned for ser-

vice (which is hardly any at all), many arecoded “CND” — Could Not Duplicate—which usually means the problem lay some-where else in the system. The followingtroubleshooting tips may sound obvious,but here are some things you can check:

Troubleshooting

No power!• Our favorite question: Is it plugged in?

Make sure the AC outlet is live (checkwith a tester or lamp).

• Our next favorite question: Is thePOWER switch on? If not, try turningit on.

• Is the blue light on the front panelilluminated? If not, make sure the ACoutlet is live. If so, refer to “No sound”below.

• The AC line fuse inside the chassis isblown. This is not a user-serviceablepart. Refer to “Repair” on page 16 tofind out how to proceed.

No sound!

• Is the input LEVEL control turned allthe way down? Follow the proceduresin the “Quick Start” section on page 6to verify that all the volume controls inthe system are properly adjusted.

• Is the signal source working (and makingunion scale)? Make sure the connectingcables are in good repair and securelyconnected at both ends. Make sure theoutput volume (gain) control on themixing console or preamp is turned upsufficiently to drive the inputs of thespeaker. You should be able to see theSIGNAL LED blink on the rear panel.

• Make sure the preamp or mixer doesnot have a Mute on, or a Tape orProcessor loop engaged. If you findsomething like this, make sure thevolume/gain is turned down beforedisengaging the offending switch.

One side is way louder than the other!

• Are the LEVEL controls set the same onboth active speakers?

• Check the PAN control or balance onthe signal source. It may be turned toofar to one side. If you’re using a stereosignal source, it may be delivering anout-of-balance stereo signal.

• Try swapping sides: Turn off the activespeakers, swap the input cables comingfrom the mixing console, turn the activespeakers back on. If the same side is stilllouder, the problem may be with youractive speakers or cables between themixer and the active speaker. If theother side is louder now, the problem iswith the mixer or the signal source.

Poor bass performance

• Check the polarity of the connectionsbetween the mixer/preamp and theactive speakers. You may have yourpositive and negative connectionsreversed at one end of one cable, causingone SRM350 to be out-of-phase.

15

Bad sound!• Is it loud and distorted? Follow the

procedures described in the “QuickStart” section to verify that the levelsare set properly.

• Is the input connector plugged com-pletely into the jack? Be sure allconnections are secure. It’s a good ideato periodically clean all electricalconnections with a non-lubricatingelectrical contact cleaner.

Noise• Make sure all connections to the active

speakers are good.• Make sure none of the signal cables are

routed near AC cables, power trans-formers, or other EMI-inducing devices.

• Is there a light dimmer or other SCR-based device on the same AC circuit asthe SRM350? Use an AC line filter orplug the SRM350 into a different ACcircuit.

Hum• Turn the LEVEL control all the way

down. If the noise disappears, it’scoming from the signal source. If not,try disconnecting the cable connected tothe INPUT jack. If the noise disappears,it could be a “ground loop,” rather thana problem with the SRM350. Try someof the following troubleshooting ideas:

• Use balanced connections throughoutyour system for the best noise rejection.

• Whenever possible, plug all the audioequipment’s linecords into outlets whichshare a common ground (see the dia-gram on page 13). The distance betweenthe outlets and the common groundshould be as short as possible.

Never remove the groundpin on the power cord ofthe SRM350 or any othercomponent. This is verydangerous.

• The hum may appear when using anunbalanced source (consumer preamp,CD player, VCR, etc.). This is caused bythe unbalanced-to-balanced interfacebetween the devices (and exacerbatedby the fact that most consumer audioequipment have a two-wire linecord,without the third-pin safety ground).

shield

123

XLRRCA3-Conductor Cable

Use an interconnect cable wired asshown below. The important point isthat the shield and the wire from theXLR pin 3 are joined at the RCA(source) end.

• Disconnect any cables which come infrom outside, such as cable TV, satelliteTV or roof top antennas. They must bedisconnected from every part of yoursystem, such as the TV, VCR andpreamp. If the hum goes away, you canadd a “ground loop isolator” in yourcable line. This is an inexpensive deviceavailable from video or TV dealers, oryou can make your own from two TVbaluns (standard TV 75/300 ohmadaptors):

The baluns are threaded at one end(75 ohm) to fit TV coax cable and havetwo wires at the other end (300 ohm).They will not affect the video quality.

• If the hum persists, try removing compo-nents one at a time from the back of themixer or preamplifier, and check for humeach time (turn off your equipmentbefore you undo any connections). It isfairly common to find more than oneproblem.

• If your preamp or mixer are the onlythings connected to the SRM350s andthe hum is still there, try differentconnection cables, or move the preamp/mixer to another location.

join (+insulate) BalunBalun

16

Repair

Service for Mackie products is availableat a factory-authorized service center. Ser-vice for Mackie products living outside theUnited States can be obtained through localdealers or distributors.

If your SRM350 needs service, please fol-low these instructions:1. Review the preceding troubleshooting

suggestions. Please.2. Call Tech Support at 1-800-898-3211,

8am to 5pm PST, to explain the problemin detail. If it appears that the SRM350needs repair, you will be given a ServiceRequest Number. Have yourloudspeaker’s serial number ready. Youmust have an Service Request Numberbefore you can obtain service at afactory-authorized service center.

3. Keep this user’s manual and the detach-able linecord. We don’t need them torepair the loudspeaker.

4. Pack the loudspeaker in its originalpackage, including endcaps and box.This is VERY IMPORTANT. Whenyou call for the Service Request Num-ber, please let Tech Support know if youneed new packaging. Mackie is notresponsible for any damage that occursdue to non-factory packaging.

5. Include a legible note stating your name,shipping address (no P.O. boxes),daytime phone number, Service RequestNumber, and a detailed description ofthe problem, including how we canduplicate it.

6. Write the Service Request Number inBIG PRINT on top of the box. Prod-uct shipped without the Service RequestNumber will be refused.

7. Tech Support will tell you where to shipthe loudspeaker for repair. We suggestinsurance for all forms of cartage.

8. We’ll try to fix the loudspeaker withinfive business days. Once it is repaired,we’ll ship it back the same way in whichit was received. This paragraph does notnecessarily apply to non-warrantyservice.Note: Under the terms of the warranty,you must ship or drop-off the unit to anauthorized service center. The returnground shipment is covered for thosedeemed by us to be under warranty.Note: You must have a sales receiptfrom an Authorized Mackie Dealer toqualify for a warranty repair.

CARE ANDMAINTENANCE

Your Mackie active speakers will providemany years of reliable service if you followthese guidelines:

Avoid exposing the activespeakers to moisture. Ifthey are set up outdoors,be sure they are undercover if you expect rain

or you live in Washington.• Avoid exposure to extreme cold (below

freezing temperatures). If you mustoperate the active speakers in a coldenvironment, warm up the voice coilsslowly by sending a low-level signalthrough them for about 15 minutesprior to high-power operation.

• Use a slighty damp cloth with a mildsoap solution to clean the cabinets. Onlydo this when the power is turned off.Avoid getting moisture into any of theopenings of the cabinet, particularlywhere the drivers are located.

Need Help?You can reach a technical support representative

Monday through Fridayfrom 7 AM to 5 PM PST at:

1-800-898-3211After hours, visit www.mackie.com and click Support,

or email us at: [email protected]


17

SRM350 SPECIFICATIONSHorn Design

Horizontal Coverage90º (1 kHz - 20 kHz)

Vertical Coverage80º (1 kHz - 20 kHz)

Mouth Size11.1 in x 6.1 in (283 mm x 154 mm)

Enclosure Construction Features

Basic Design Asymmetrical TrapezoidalMaterial PolypropyleneFinish Grey textured finishHandles One on side, one on topGrille Perforated metal with

weather-resistant coating

Line Input Power

Power Consumption 120 watts with musicalprogram and LIMITLED blinking

US 120 VAC, 60 HzRecommended Amperage Service 2.5 ampsEurope 230 VAC, 50 HzRecommended Amperage Service 1.25 ampsJapan 100 VAC, 50/60 HzRecommended Amperage Service 3.0 ampsAC Connector 3-pin IEC 250 VAC

Control System Functions

Electronic CrossoverPhase AlignmentEqualizationParametric Equalization

Safety Features

Protection Low-frequency Dynamic BassProtection, Power Supply, andAmplifier Thermal Protection

Display LEDs Signal, Power, Limit

Physical PropertiesHeight 20.75 in/527 mmWidth 13.10 in/333 mmDepth 12.25 in/311 mmWeight 32 lb/14.5 kgMounting Methods

Optional hanging brackets for top and bottom of en-closure (SRM350 Bracket Kit: Part No. 0016404).Never attempt to suspend the cabinet by its handles.The SRM350 is pole-mountable via the built-insocket on the bottom of the cabinet. Be sure the poleis capable of supporting the weight of the SRM350.

DisclaimerSince we are always striving to make our

products better by incorporating new and improvedmaterials, components, and manufacturing methods,we reserve the right to change these specifications atany time without notice.

“Mackie” and the “Running Man” figure areregistered trademarks of LOUD Technologies Inc.

All other brand names mentioned are trade-marks or registered trademarks of their respectiveholders, and are hereby acknowledged.

©2004-2005 LOUD Technologies Inc.All Rights Reserved.

System SpecificationsFrequency Response (–3 dB)

83 Hz - 18.5 kHzFrequency Range (–10 dB)

61 Hz - 22 kHzMax SPL Long-Term @ 1m 118 dBMax SPL Peak @ 1m 121 dBCrossover Linkwitz-Riley

24 dB/octave @ 2400 Hz

AudioInput Type Balanced DifferentialInput Impedance 94k ohmsSensitivity (center detent)

Line: +4 dBuMic: –36 dBu

Maximum Input Level +22 dBuAcoustic Contour Equalization (peaking)

+3 dB @ 100 Hz,+3 dB @ 12 kHz

Accessory Interface ± 15 VDC,normalized signal I/O

Operating Temperature Range–10ºC - 45ºC(14ºF - 113ºF)

Power AmplifiersLow-Frequency Power Amplifier

Rated Power 165 watts continuous*Rated THD < 0.03%Cooling Convection ExtrusionDesign Class H

High-Frequency Power Amplifier

Rated Power 30 watts continuous*Rated THD < 0.03%Cooling Convection ExtrusionDesign Class H

* Rated power is continuous rms wattage intotransducer’s rated impedance @ 1 kHz for the HFamplifier and @ 100 Hz for the LF amplifier.

Transducer SpecificationsLow-Frequency Transducer

Diameter 10 in/250 mmVoice Coil Diameter 2.0 in/51 mmSensitivity (1W@1m) 96 dBPower Handling 250 watts rms, long-termFrequency Range 61 Hz - 3 kHzMagnet Type Ferrite

High-Frequency Transducer

Diaphragm Diameter 1.4 in/36 mmHorn Exit Diameter 1 in/25.4 mmDiaphragm Material TitaniumSensitivity (1W@1m) 104 dBNominal Impedance 16 ohmsPower Handling 75 watts rms, long-termFrequency Range 1 kHz - 20 kHzMagnet Type Ferrite

R

18

SRM350 BLOCK DIAGRAM

XLR

TRS

THRU

2 31

2 31

+ –MID

VDC

+ –LO V

DC

+ –15 V

DC

+ –H

I VDC

TORO

IDAL

POW

ERTR

ANSF

ORM

ER

FUSE

POW

ERSW

ITCH

MIC

/LIN

E IN

PUT

XLR/

TRS

COM

BO

MIC

/LIN

ESW

ITCH

A =

+40

dB

LEVE

L

LIM

ITER

ACTI

VE P

ROTE

CTIO

N M

ANAG

EMEN

T SY

STEM

THER

MAL

SENS

OR

CONT

OUR

SIG

NAL

LIG

HT

HI-P

ASS

HI-F

REQ

TWEE

TH

I-FRE

QAM

P

LO-P

ASS

LO-F

REQ

DYNA

MIC

BAS

S BO

OST

LO-F

REQ

AMP

WOO

F

LO-F

REQU

ENCY

DRIV

ER

HI-F

REQU

ENCY

DRIV

ER

LIM

ITLI

GH

T PEAK

DETE

CTIO

N

POW

ERLI

GH

T

MAC

KIE

DESI

GNS

SRM

350

BLOC

K DI

AGRA

M08

.20.

03

19

A. LOUD Technologies Inc. warrants all materials,workmanship and proper operation of this productfor a period of five years from the original date ofpurchase, with the exception of the transducers,including woofers and compression drivers, whichare warranted for two years from the original dateof purchase. If any defects are found in the materialsor workmanship or if the product fails to functionproperly during the applicable warranty period,LOUD Technologies, at its option, will repair orreplace the product. This warranty applies only toequipment sold and delivered within the U.S. byLOUD Technologies Inc. or its authorized dealers.B. Failure to register online or return the productregistration card will not void the five-year warranty.C. Service and repairs of Mackie products are to beperformed only at a factory-authorized facility (see Dbelow). Unauthorized service, repairs, ormodification will void this warranty. To obtainrepairs under warranty, you must have a copy ofyour sales receipt from the authorized Mackiedealer where you purchased the product. It isnecessary to establish purchase date and determinewhether your Mackie product is within thewarranty period.D. To obtain factory-authorzied service:

1. Call Mackie Technical Support at 800/898-3211, 7 AM to 5 PM Monday through Friday(Pacific Time) to get a Return Authorization (RA).Products returned without an RA number will berefused.2. Pack the product in its original shipping carton.Do not use “packing peanuts,” shreddednewspapers, or other material with small particlesto pack the product. Please seal the Mackieproduct in a plastic bag.3. Also include a note explaining exactly how toduplicate the problem, a copy of the sales receiptwith price and date showing, and your returnstreet address (no P.O. boxes or route numbers,please!). If we cannot duplicate the problem orestablish the starting date of your LimitedWarranty, we may, at our option, charge forservice time.4. Tech Support will tell you where to ship theproduct. Ship it freight prepaid in its originalshipping carton.

IMPORTANT: Make sure that the ServiceRequest Number is plainly written on theshipping carton.

E. LOUD Technologies reserves the right to inspectany products that may be the subject of anywarranty claims before repair or replacement iscarried out. LOUD Technologies may, at our option,require proof of the original date of purchase in theform of a dated copy of the original dealer’s invoiceor sales receipt. Final determination of warrantycoverage lies solely with LOUD Technologies.

F. Any products returned to one of the LOUDTechnologies factory-authorized service centers anddeemed eligible for repair or replacement under theterms of this warranty will be repaired or replacedwithin thirty days of receipt by LOUD Technolo-gies. LOUD Technologies and its authorized servicecenters may use refurbished parts for repair orreplacement of any product. Products returned toLOUD Technologies that do not meet the terms ofthis Warranty will not be repaired unless payment isreceived for labor, materials, return freight, andinsurance. Products repaired under warranty willbe returned freight prepaid by LOUD Technologiesto any location within the boundaries of the USA.G. LOUD Technologies warrants all repairsperformed for 90 days or for the remainder of thewarranty period. This warranty does not extend todamage resulting from improper installation,misuse, neglect or abuse, or to exterior appearance.This warranty is recognized only if the inspectionseals and serial number on the unit have not beendefaced or removed.H. LOUD Technologies assumes no responsibilityfor the quality or timeliness of repairs performed byAuthorized Mackie Service Centers.I. This warranty is extended to the originalpurchaser and to anyone who may subsequentlypurchase this product within the applicablewarranty period. A copy of the original sales receiptis required to obtain warranty repairs.J. This is your sole warranty. LOUD Technologiesdoes not authorize any third party, including anydealer or sales representative, to assume anyliability on behalf of LOUD Technologies or to makeany warranty for LOUD Technologies Inc.K. THE WARRANTY GIVEN ON THIS PAGE IS THESOLE WARRANTY GIVEN BY LOUD TECHNOLOGIESINC. AND IS IN LIEU OF ALL OTHER WARRANTIES,EXPRESS AND IMPLIED, INCLUDING THEWARRANTIES OF MERCHANTABILITY ANDFITNESS FOR A PARTICULAR PURPOSE. THEWARRANTY GIVEN ON THIS PAGE SHALL BESTRICTLY LIMITED IN DURATION TO FIVE YEARSFROM THE DATE OF ORIGINAL PURCHASE FROMAN AUTHORIZED MACKIE DEALER. UPONEXPIRATION OF THE APPLICABLE WARRANTYPERIOD, LOUD TECHNOLOGIES INC. SHALLHAVE NO FURTHER WARRANTY OBLIGATIONOF ANY KIND. LOUD TECHNOLOGIES INC.SHALL NOT BE LIABLE FOR ANY INCIDENTAL,SPECIAL, OR CONSEQUENTIAL DAMAGES THATMAY RESULT FROM ANY DEFECT IN THEMACKIE PRODUCT OR ANY WARRANTY CLAIM.Some states do not allow exclusion or limitation ofincidental, special, or consequential damages or alimitation on how long warranties last, so some ofthe above limitations and exclusions may not applyto you. This warranty provides specific legal rightsand you may have other rights which vary fromstate to state.

Please keep your sales receipt in a safe place.SRM350 LIMITED WARRANTY

16220 Wood-Red Road NE • Woodinville, WA 98072 • USAUnited States and Canada: 800.898.3211Europe, Asia, Central and South America: 425.487.4333Middle East and Africa: 31.20.654.4000Fax: 425.487.4337 • www.mackie.comE-mail: [email protected]


SRM350 2-Way Active Loudspeaker User's Manual INTRODUCTION Thank you for choosing LOUD Technologies’ Mackie active sound reinforcement speakers. The SRM350 is an active two-way loud-speaker

Documents