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13

Wherever possible, connect all of your

equipment to the same electrical circuit.
This will help reduce the possibility of a
ground loop problem causing an annoying
hum in your speakers.

Low power components such as tape

decks, mixers, effects processors and CD
players should be connected to the same
outlet as the SRM450s. Use fused power
strips as shown in the diagram below. Make
sure that the total current draw of your
components does not exceed the capability
of the outlets and power strips.

For the US 120 V model:
A maximum of five SRM450s can be

connected per 15A service.

This allows each SRM450 to be safely

operated at its maximum level.

When turning your system on, turn on

the SRM450s last. This will stop any turn-
on thumps and bangs from your source
equipment being amplified.

When turning off your system, turn off

the SRM450s first. This will prevent any
turn-off thumps and bangs from your
source equipment being amplified.

SRM450

  

SRM450

  

When setting up for a
show, often you are plug-
ging into an AC power
distribution system you
know nothing about. You

may even be faced with 2-wire outlets that
are missing the third safety ground pin. It’s
a good idea to have a three-wire AC outlet
tester in your toolbox so you can check the
outlets yourself to make sure they are wired
correctly. These testers will tell you if the
polarity of the hot and neutral wires is re-
versed and if the safety ground is
disconnected.

Don’t use an outlet if it is
wired improperly! This
is to protect yourself as
well as your equipment.

Never remove the
ground pin on the power
cord of the SRM450 or
any other component.
This is very dangerous.

SRM450: AC CONNECTIONS

Summary of Contents for SRM 450

Page 1: ...SRM450 ACTIVE SOUND REINFORCEMENT SPEAKER USER S MANUAL AND WARRANTY REGISTRATION...

Page 2: ...e in performance or E This Mackie product has been dropped or its chassis damaged 12 Servicing The user should not attempt to service this Mackie product beyond those means described in this operating...

Page 3: ...worn when operating this amplification system in order to prevent a permanent hearing loss if exposure is in excess of the limits set forth here Duration Per Day Sound Level dBA Typical In Hours Slow...

Page 4: ...htweight high strength cabinet FR Series Power Amplifiers To power these beautiful things each SRM450 includes two of our acclaimed FR Series Fast Recovery power amplifiers Our exclusive design uses l...

Page 5: ...nitor applications The Active Advantage There are a number of advantages to us ing an active speaker system over a passive loudspeaker The internal crossover is active and its low power circuitry oper...

Page 6: ...M450 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 Volume control if it has one is turne...

Page 7: ...SRS1500 Subwoofer to create an incredibly powerful system The active crossover inside the SRS1500 splits the full range in put signal into two ranges The SRS1500 plays the low frequency range through...

Page 8: ...here is plenty of ventilation to the rear panel Please see Ther mal Considerations on page 12 The SRM450 has several connectors controls and indicators that you should understand IEC Socket This is wh...

Page 9: ...it will be in the NORMAL position 12 o clock If you have a particu larly high line level signal connected to the SRM450 you may need to turn the control down to the LINE indication 9 o clock If you h...

Page 10: ...450 helps to minimize the problems that typically arise Balanced XLR Connectors CONNECTIONS The SRM450 has a female XLR input that accepts a balanced or unbalanced mic or line level signal When connec...

Page 11: ...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 Maki...

Page 12: ...in the U S This provides two phases of AC 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 the service and power...

Page 13: ...thumps and bangs from your source equipment being amplified When turning off your system turn off the SRM450s first This will prevent any turn off thumps and bangs from your source equipment being am...

Page 14: ...ecurely connected at both ends Make sure the output volume gain control on the mixing console or preamp is turned up sufficiently to drive the inputs of the speaker You should be able to see the SIGNA...

Page 15: ...s is very dangerous The hum may appear when using an unbalanced source consumer preamp CD player VCR etc This is caused by the unbalanced to balanced interface shield 1 2 3 XLR RCA 3 Conductor Cable b...

Page 16: ...f the prob lem including how we can duplicate it 6 Write the RA number in BIG PRINT on top of the box 7 Ship the active speaker to us We recommend United Parcel Service UPS We suggest insurance for al...

Page 17: ...Over Excursion Protection Second Order High Pass Filter Thermal Protection Amplifier shutdown auto reset Low Line Voltage Shut Down 60 Nominal line Acoustic Frequency Response 48Hz 20kHz Low Freq 3 dB...

Page 18: ...ET LO FREQ AMP HI FREQ AMP SENSE RESISTOR BASS CONTROL SERVO LOOP WOOF PEAK LIGHT PEAK DETECTION MACKIE DESIGNS SRM450 BLOCK DIAGRAM 071699SE THRESHOLD LPF THRESHOLD MID VDC LO VDC HI VDC TOROIDAL POW...

Page 19: ...ke sure that the problem can be dupli cated If you bring your active speaker to an Authorized Service Center and they can t find anything wrong with it you may be charged a service fee 4 If the Mackie...

Page 20: ...rope Asia Central South America 425 487 4333 Middle East Africa 31 20 654 4000 Fax 425 487 4337 www mackie com E mail sales mackie com Some of the people at our factory who helped design build sell an...

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