Nathy
Joined: 01/12/08
Posts: 295
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PA Linking
#999246 - 22/07/12 06:34 PM
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Hey guys
Im about to do a gig for a band and theyve asked me if I can link my
PA system up (JBL EON 515s and 518s) with their PA System (Mackie Actives).
Is
it a good idea? Or will it just not work properly.. Im not entirely sure on the power
ratings etc, they are both active systems though..
Cheers
--------------------
Nathan Stewart | Freelance Sound Engineer
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Dave71
Joined: 21/04/05
Posts: 542
Loc: Lat: 54:24:38N Lon: 1:43:30W
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Re: PA Linking
[Re: Nathy]
#999261 - 22/07/12 07:34 PM
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Technically its easy, just link via XLR's if they are all powered units. However if you
link the mackies from your tops (assuming you are using the crossover in your subs) you
will end with too much mid tops. Going through the mackies then into your bins will allow
the mackies to run full range.
If they have a pair of SRM 450's i wouldn't
bother but if they are something more meaty like the HD line then you may benefit.
saying all that the purists would cringe at the thought of using different
speakers in the same rig as your JBL's will behave slightly differently to the mackies
causing some minor phasing issues.
if you find out exactly what they have that
may prompt folk for a more definitive answer
hope that helps
--------------------
I eat kebabs when i'm sober!
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Mike Stranks
active member
Joined: 03/01/03
Posts: 3110
Loc: Oxford, UK
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Re: PA Linking
[Re: Nathy]
#999281 - 22/07/12 09:31 PM
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Quote Nathy:
Hey guys
Im about to do a gig for a band and theyve asked me if I can link my PA system up (JBL
EON 515s and 518s) with their PA System (Mackie Actives).
Is it a good idea? Or
will it just not work properly.. Im not entirely sure on the power ratings etc, they are
both active systems though..
Cheers
Why do they want to do this? (Dave's already covered the important
bases.)
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Dave Gate
active member
Joined: 02/02/04
Posts: 1353
Loc: M6/M61/M60/M62/M65
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Re: PA Linking
[Re: Nathy]
#999287 - 22/07/12 10:04 PM
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They probably think, erroneously, that having two linked PAs will somehow make them twice
as loud.
--------------------
Gear List: reverse only.
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Nathy
Joined: 01/12/08
Posts: 295
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Re: PA Linking
[Re: Nathy]
#999422 - 23/07/12 06:31 PM
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Thats exactly what it is Dave. They think it'll be louder because of the
addition of 2 tops and 2 subs. I think Ive persuaded the band not to bother
 Thanks everyone for the replies!
-------------------- Nathan Stewart | Freelance Sound Engineer
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OverDrawn
Joined: 22/07/12
Posts: 16
Loc: United Kingdom
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Re: PA Linking
[Re: Nathy]
#999467 - 24/07/12 06:38 AM
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I suppose if you double the sound pressure (like if you have a speaker, and you ad the
same one) than sound pressure level should raise only 6 dB. So you will just need a lot of
power, but the result will not be as good as the band want (they not gonna be twice loud)
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grab
Joined: 08/07/07
Posts: 2627
Loc: Cambridge, UK
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Re: PA Linking
[Re: Nathy]
#999495 - 24/07/12 09:28 AM
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Worth doing if you need to cover a large area. But don't just lump them all together -
put one set of speakers somewhere further forward, and delay the send to it appropriately
(1ms per foot). Look up "Haas effect".
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tacitus
Joined: 04/02/08
Posts: 780
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Re: PA Linking
[Re: Nathy]
#999545 - 24/07/12 12:28 PM
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Nothing to stop you putting them up and not using them (apart from the effort needed).
Most people will think the show's louder as there are more speakers there. And handy for
extra coverage - I do outdoor gigs regularly and I used to think people decided to sit at
the sides to get less noise. Can't imagine why, because obviously they sit there so they
can moan about the PA not being loud enough. They must like people-watching; they're
usually far enough round that the stage is completely out of sight to them.
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Nathy
Joined: 01/12/08
Posts: 295
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Re: PA Linking
[Re: Nathy]
#999641 - 24/07/12 08:20 PM
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I did consider placing them forward for more coverage, will look further into that  Thanks
-------------------- Nathan Stewart | Freelance Sound Engineer
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