Mackie SRM350 User Manual

SRM350

v2 Active

Sound ReinfoRceMent SPeAKeR uSeR’S MAnuAl

IMPORTANT SAFETY INSTRUCTIONS

PORTABLE CART WARNING

Carts and stands - The Component should be used only with a cart or stand that is recommended by the manufacturer. A Component and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the Component and cart combination to overturn.

CAUTION AVIS

RISK OF ELECTRIC SHOCK

DO NOT OPEN

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK

DO NOT REMOVE COVER (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

ATTENTION: POUR EVITER LES RISQUES DE CHOC

ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN

ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIER

L'ENTRETIEN AU PERSONNEL QUALIFIE.

AVIS: POUR EVITER LES RISQUES D'INCENDIE OU

D'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.

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 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. 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.

10. Protect the power cord from being walked on or pinched particularly

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

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

12. Use only with a cart, stand, tripod, bracket, or table speciﬁed by the

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

13. Unplug this apparatus during lightning storms or when unused for

long periods of time.

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

when the apparatus has been damaged in any way, such as powersupply 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.

15.

This apparatus shall not be exposed to dripping or splashing, and no object ﬁlled with liquids, such as vases, shall be placed on the apparatus.

16. 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).

17.

This apparatus has a detachable power cord that is connected to the IEC socket on the rear panel and should remain readily accessible to the user.

18. This apparatus has been equipped with an all-pole, rocker-style AC

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

19. This apparatus does not exceed the Class A/Class B (whichever is ap-

plicable) 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.

20. Exposure to extremely high noise levels may cause permanent

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

According to OSHA, any exposure in excess of these permissible limits could result in some hearing loss. To ensure against potentially danger ous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pres sure 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

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

 8  90 Duoinsmallclub

 6  92 

 4  95 SubwayTrain

 3  97

 2  100 Veryloudclassicalmusic

 1.5 102

 1  105 TamiscreamingatAdrianaboutdeadlines

 0.5 110

 0.25orless 115 Loudestpartsatarockconcert

here.

WARNING — To reduce the risk of ﬁre

or electric shock, do not expose this

apparatus to rain or moisture.

Contents

IMPORTANT SAFETY INSTRUCTIONS .......................................2

INTRODUCTION .......................................................................4

The Transducers ...............................................................4

Power Ampliﬁers ............................................................4

The Crossover ..................................................................4

The Cabinet .....................................................................4

HOOKUP DIAGRAMS ..............................................................6

Quick Start ......................................................................6

REAR PANEL DESCRIPTION ......................................................8

1. IEC Socket ....................................................................8

2. POWER Switch ............................................................8

3. POWER Indicator .........................................................8

4. CONTOUR ...................................................................8

5. LEVEL ...........................................................................8

6. MIC/LINE Switch ..........................................................9

7. SIGNAL Indicator .........................................................9

8. LIMIT Indicator .............................................................9

9. INPUT Connector .........................................................9

10. THRU Connector ........................................................9

CONNECTIONS ......................................................................10

PLACEMENT ...........................................................................10

Room Acoustics .............................................................10

RIGGING ..............................................................................

THERMAL CONSIDERATIONS .................................................12

AC POWER CONSIDERATIONS ..............................................12

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

SERVICE INFORMATION ........................................................14

Troubleshooting .............................................................14

Repair ............................................................................16

CARE AND MAINTENANCE ....................................................16

SRM350 v2 SPECIFICATIONS .................................................17

SRM350 v2 BLOCK DIAGRAM...............................................18

SRM350 v2 LIMITED WARRANTY ..........................................19

• Please write the serial number for your SRM350 v2 here (or for both SRM350 v2s if you have two) for future reference (i.e., insurance claims, tech support, return authorization, etc.):

Loudspeaker 1 Loudspeaker 2

Purchased at:___________________________________ Date of Purchase:_____________

Don’t forget to visit our website at www.mackie.com

for more information about this and other Mackie products.

Part No. 0026949 Rev. A 11/07

INTRODUCTION

Thank you for choosing LOUD Technologies’ Mackie ac-

tive sound reinforcement speakers.

The SRM350 v2 is a redesigned version of our popular SRM350 active loudspeaker. With its newly designed Class-D Fast-Recovery ampliﬁers, high-output compression and new 10" neodymium woofer, it produces an even smoother sound than the original. SRM means Sound Reinforcement Monitor, and the SRM350 v2 truly produces a studio quality sound in a sound reinforcement speaker.

Our design goal was to build a sound reinforcement speaker with:

1. High precision, high output, and accurate playback.

Very wide, smooth dispersion of mid and high frequencies.

3. Ergonomically correct physical design for easy transport

and set up.

Through the combined resources of our top-notch mechanical and analog engineers, and our experienced transducer engineers at EAW, we were able to achieve our design goals in every aspect. The result is a sound reinforcement system equally at home in a concert setting, in the studio, impromptu concerts on the studio roof, in the cinema, or in a home theater.

driver

The Transducers

The SRM350 v2 active speakers feature a 10-inch highpower low-frequency woofer with a neodymium magnet, and a 1.4-inch titanium diaphragm compression driver. This high-fre on an acoustically non-resonant exponential waveguide, providing a wide, controlled dispersion and precise reproduction of the critical upper mid-range and high frequencies. The result is an unbelievably smooth off-axis response that allows everyone ence the same high-resolution audio no matter where they are seated.

high-output ceramic

quency driver is mounted

in the audience to experi-

Power Amplifiers

To power these beauties, each SRM350 v2 includes two of our acclaimed FR Series “Fast Recovery” power ampliﬁers. In addition, the low-frequency ampliﬁer uses a Class-D design for improved efﬁciency and cleaner power. Our exclusive designs use low negative feedback, yet allow the ampliﬁers to maintain low distortion and stability and to quickly recover when driven into clipping.

The ampliﬁers include the following features:

• The low-frequency ampliﬁer produces 165 continuous

watts before clipping.

• The high-frequency ampliﬁer produces 30 continuous

watts before clipping.

• When the output from either ampliﬁer begins to clip,

a limiter gently reduces the input signal level until the output is no longer clipping.

• The low-frequency ampliﬁer also has a Dynamic Bass Boost circuit. Our ears are more sensitive to bass frequencies at high volume levels than at softer volumes. This unique circuit automatically reduces the low frequencies below 70 Hz as the volume of the speakers goes up. This results in improved efﬁciency for the low-frequency ampliﬁer because it is not wasting power trying to reproduce frequencies we hear better at loud volumes. Instead, the power is used for the frequencies where it is needed, resulting in a louder sound.

Warning: Although the ampliﬁers have these protection circuits, you must still make sure the LIMIT light is not blinking continuously. If it is, turn down your mixer faders, or preampliﬁer gain, or turn down the SRM350 v2 LEVEL control.

The Crossover

The built-in electronic crossover is a 24 dB/octave Linkwitz-Riley design. Although more expensive than other crossover designs, the beneﬁts provided by the LinkwitzRiley design have been well documented. These beneﬁts include:

• Absolutely ﬂat frequency response throughout the

bandpass, without the characteristic ripple near the crossover point exhibited by other designs.

• The sharp 24 dB per octave roll-off of the ﬁlters ensures

that the transducers aren’t reproducing frequencies outside of their capabilities.

• The acoustic sum of the two driver responses is unity

at the crossover frequency, resulting in perfect power response.

• Our heroic engineers have worked carefully to en

sure that the SRM350 v2 also provides perfect phase response. This diligence has yielded phenomenal accuracy, even if you are standing 20 feet away.

The Cabinet

The SRM350 v2 cabinet was designed to be the strongest molded composite cabinet on the planet. This material is as strong as concrete, and rigid enough to prevent unwanted vibrations in the cabinet. An optional bracket kit is available for the top and bottom of the cabinet to be used for ﬂying, and a socket is provided in the bottom of the cabinet for mounting on a tripod stand. Although it is an exceptional choice for installed sound situations, its light weight and durable ﬁnish also make it ideal for portable sound system use. The asymmetrical trapezoidal design of the cabinet makes it easy to use as a ﬂoor wedge for stage monitor applications.

The Active Advantage

There are a number of advantages to using an active

speaker system over a passive loudspeaker:

• The internal crossover is active, and its low power cir cuitry operates on line-level signals. It does not waste speaker-level power like a passive crossover with large coils, caps, and resistors.

• The input signals are crossed over before they reach the ampliﬁers, so each ampliﬁer only receives the correct frequency range for its driver.

• The ampliﬁers are designed speciﬁcally for these speaker load impedances. There is no guesswork as to what load each ampliﬁer has to drive, so they can provide maximum acoustic output from the speakers, yet minimize the danger of speaker damage due to overdriving a lesser ampliﬁer.

• The connecting wires between the ampliﬁer outputs and the drivers are kept to a minimum, so the damping factor of the ampliﬁer isn’t compromised by the resistance of long speaker cables. In addition, all the power from the ampliﬁer is transferred directly to the drivers with no speaker cable losses.

• The acoustic sum of the outputs from the two drivers is optimized electronically, as well as physically, so the amplitude response is ﬂat and there is no lobing error.

• The presence of active circuits within the speaker cabinet allow the designer to add on extra details, such as a high quality mic/line input section and optional accessory modules.

In short, all the complex interconnected components in the system are designed to work in harmony with each other to produce the best possible sound.

HOOKUP DIAGRAMS

12k/AIR100Hz

CONTOUR

(+3dB)

POWER

LIMIT

SIGNAL

LINE MIC

LEVEL

+45

+5dB

NORMAL

PARALLEL

INPUT

THRU

CAUTION: REPLACE WITH THE SAME FUSE AND RATING. DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE.

100 - 120V / 50 - 60 Hz 220W

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES FOR THE U.S. AND ICES-003, FOR CANADA. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

12k/AIR100Hz

CONTOUR

(+3dB)

POWER

LIMIT

SIGNAL

LINE MIC

LEVEL

+45

+5dB

NORMAL

PARALLEL

INPUT

THRU

CAUTION: REPLACE WITH THE SAME FUSE AND RATING. DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE.

100 - 120V / 50 - 60 Hz 220W

Mixer or

Preamplifier

Right Line level Output

Left

Line level

Output

PREMIUM ANALOG M IXER

w/ PERKINS EQ & FIREWIR E OP TION

1 2 3 4 567891011

Quick Start

1. Start with the following settings on the back of the SRM350 v2:

Turn the POWER switch off (down). Set the CONTOUR and MIC/LINE switches out. If using

a microphone as the input to the SRM350 v2, push the MIC/LINE switch in.

WARNING: Turn the LEVEL control down (counterclockwise) before every use. If not, you could be in for a startling surprise, especially if the last time you used it was with a microphone and now you want to connect a line-level source.

2. Connect the output from your signal source (mixing console, microphone, preamp, or other mic- or line-level source) directly to the INPUT connector on the back of the SRM350 v2. This is a combination XLR and 1/4" TRS connector, and accepts balanced or unbalanced line-level signals from mixers, preampliﬁers, CD players, tape decks, etc., with the MIC/LINE switch out, and accepts direct connections from dynamic microphones with the MIC/LINE switch pushed in.

3. Connect the supplied AC power cord to the IEC socket on the back of the SRM350 v2. Plug the other end into an AC outlet properly conﬁgured with the correct voltage for your particular model.

4. Turn on your signal source. Make sure its Master Vol ume control (if it has one) is turned all the way down.

5. Turn on the SRM350 v2 POWER switch.

6. Start the signal source, whether it be speaking into a microphone or starting a CD player. Adjust any volume controls on the signal source for normal operation.

7. Slowly turn up the LEVEL control on the back of the SRM350 v2 until the desired volume is reached (and the LIMIT light does not come on). Always wear hearing protectors if you are close when it is playing at high levels.

8. If there is no sound,

always turn down the SRM350 v2 LEVEL control before investigating. There may be a mixer or preampliﬁer mute or tape switch engaged, or a mic switch off.

SRM350 v2: STEREO OPERATION WITH A MIXER

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