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Here are some other placement tips:

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This increases the low-frequency output and can cause 
the sound to be muddy and indistinct.

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increases the low frequency output, though not as 
much as corner placement. However, if you do need to 
reinforce the low frequencies, this is a good way to do it.

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hollow stage floor. A hollow stage can resonate at 
certain frequencies, causing peaks and dips in the 
frequency response of the room. It’s better to place  
the active speakers on a sturdy table or tripod stands.

s 0OSITIONTHEACTIVESPEAKERSSOTHEHIGHFREQUENCY

drivers are two to four feet above ear level for the   
audience (make allowances for a standing/dancing 
in the aisles audience). High frequencies are highly  
directional and tend to be absorbed much easier than 
lower frequencies. By providing direct line-of-sight 
from the active speakers to the audience, you increase 
the overall brightness and intelligibility of the sound 
system.

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auditoriums, are a nightmare for sound system  

 

intelligibility. Multiple reflections off 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.

 

Use more speakers strategically placed so they are closer 
to the back of the audience. If the distance between the 
front and back speakers is more than about 100 feet, you 
should use a delay processor to time-align the sound. 
(Since sound travels about 1 foot per millisecond, it 
takes about 1/10 of a second to travel 100 feet).

Rigging Points

Both Sides

Back

Bottom

Top

Pole 

Mount

RIGGING

The SRM450v2 cabinets are fitted with ten rigging points 

as shown in the diagram below. These are M10 inserts. M10 
threaded eyebolts (M10 x 1.5 mm x 20 mm) are available to 
fit these inserts (PA-A1 Eyebolts).

WARNING:

 Never attempt to suspend 

the SRM450v2 active speakers by their 
handles. If you want to suspend them, 
use the rigging points only. Consult a 
professional rigger or structural    

engineer prior to suspending loudspeakers from a structure 
not intended for that use. Always know the working load 
limit of the structure supporting the loudspeaker array.  
Always make sure that the rigging hardware minimum  
rating is at least five times the actual load.

If you are hanging them in an  
inaccessible place, such as over a lion’s 
cage, make sure that you first complete 
the sound check and set the SRM450v2 
LEVEL correctly. Also set the TIMED 

TURNOFF switch if you want the SRM450v2 to turn on 
when there is a signal present. It will also turn off after 
three or more minutes of silence. 
 

 

 

Summary of Contents for SRM450v2

Page 1: ...F 4A B 0 D0 Powered Loudspeaker SRM450v2...

Page 2: ...cessible to the user 19 The MAINS plug or an appliance coupler is used as the disconnect device so the disconnect device shall remain readily operable 20 NOTE This equipment has been tested and found...

Page 3: ...NTRODUCTION 4 HOOKUP DIAGRAMS 6 Quick Start 6 REAR PANEL DESCRIPTION 8 1 IEC Socket 8 2 POWER Switch 8 3 POWER ON Indicator 8 4 TIMED TURNOFF 8 5 THERMAL Indicator 8 6 CONTOUR 8 7 LOW CUT 8 8 LEVEL 9...

Page 4: ...res s 4HE LOW FREQUENCY AMPLIlER PRODUCES UP TO WATTS peak 300 continuous before clipping s 4HE HIGH FREQUENCY AMPLIlER PRODUCES UP TO WATTS peak 100 continuous before clipping s Each ampli er has its...

Page 5: ...ampli er only receives the correct frequency range for its driver s 4HE AMPLIlERS ARE DESIGNED SPECIlCALLY FOR THESE speaker load impedances There is no guesswork as to what load each ampli er has to...

Page 6: ...M450v2 until the desired volume is reached and the PEAK 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...

Page 7: ...rophones away from the SRM450v2s otherwise you may get feedback Power Cord Power Cord Pole Mount Pole Mount Line level High Pass output Line level High Pass output Power Cords Mixing Console Mackie On...

Page 8: ...ing the SRM450v2 as a stage monitor This allows the bass ampli er to utilize its power for those frequencies useful in stage monitor applications The SRM450v2 has several connectors controls and indic...

Page 9: ...el It senses the signal just prior to the LEVEL control so even if the LEVEL control is turned down the SIGNAL PRESENT indicator still works letting you know there is a signal present at the input bef...

Page 10: ...rsion of the SRM450v2 helps to minimize the problems that typically arise Balanced XLR Connectors CONNECTIONS The SRM450v2 has a female XLR input that accepts a balanced or unbalanced mic or line leve...

Page 11: ...e 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 re ections become louder too The best app...

Page 12: ...pping the SRM450v2 120V model draws 2 5 amps on average 1 3 amps for the 240V model Under normal conditions the current draw is below 1 amp We recommend that a stiff robust supply of AC power be used...

Page 13: ...plugging 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 out...

Page 14: ...ctions with a non lubricating electrical contact cleaner If you think your Mackie product has a problem please check out the following troubleshooting tips and do your best to con rm the problem Visit...

Page 15: ...ed interface between the devices and exacerbated by the fact that most consumer audio equipment have a two wire linecord without the third pin safety ground Use an interconnect cable wired as shown be...

Page 16: ...ovide many years of reliable service if you follow these guidelines Avoid exposing the loudspeakers to moisture If they are set up outdoors be sure they are under cover if you expect rain or you live...

Page 17: ...es mentioned are trademarks or registered trademarks of their respective holders and are hereby acknowledged 2003 2011 LOUD Technologies Inc All Rights Reserved System Speci cations Frequency Response...

Page 18: ...ENCY DRIVER TWEET LO FREQ AMP HI FREQ AMP SENSE RESISTOR BASS CONTROL SERVO LOOP WOOF PEAK LIGHT PEAK DETECTION THRESHOLD LPF THRESHOLD MID VDC LO VDC HI VDC POWER TRANSFORMER FUSE POWER SWITCH SWITCH...

Page 19: ...ive 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 supp...

Page 20: ...F S ATS A PS 4 F SX eX T F0 DB0 D XcTS BcPcTb P S 2P PSP 4da _T 0bXP 2T caP P S B dcW 0 TaXRP XSS T 4Pbc P S 0UaXRP 5Pg fff PRZXT R 4 PX bP Tb PRZXT R...

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