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Line array Project

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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Topic: Line array Project
    Posted: 01 November 2006 at 9:07am
How about we play a little with this new technology...

I am surprised that it had not been tackled yet in the DIY  zone

so, here it is

a preliminary line array module designed by me a few days ago



it uses:
P-audio P10/100MB for midbass,  horn loaded (90Hz - 400Hz)
Beyma 5G40ND for Mid , Horn loaded (400Hz - 3000Hz)
http://prescomaudio.com/pdf/BEYMAPDF/5G40Nd.pdf
P-audio WN-D44 on PH14525 Line array horn - for high frequency (3000Hz - 20 000 Hz


everything is horn loaded , an everything is in a compact package 700/350/450 mm W/H/D

a single unit should be capable of about 126-127 dB continuous from 90-20000 Hz

Punishers would take care of the 40-90Hz region

what do you guys think

ah, and a sim of the midbass section (9 units hung in free space (minimal for line array behavior ) fed with 9x300W RMS )



 

general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 9:27am
Thata looks quite a lot like a project that is in my mind for a longer period.

The difference is mine are with 1x15, 2x8 and 2x1 or1,4.

Layout is just the same

Regards
Marjan
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 9:41am
I like to keep things tiny

I have started exactly with 15" + 2x8"+2x1" but I came across a problem..

2x 8" drivers would be too far apart (concerning emmision centers ) to sum corectly until the crossover point to the drivers, which would result in comb filtering => not a line array behavior

anyway , by using smaller components I am able to reach higher SPL's/ cubic meter of speakers
general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 9:53am
I was considering that. However if i use 2x6 section i am affraid that it wont keep up with the 15 section and dont go low enough safely. (300Hz)

But for sure is better to have more smaller that fewer bigger cabinets.

What do you think, can alfa 6 be used?
I have problem in getting other products here but Eminence and 18Sound.
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 9:54am
check out the LA-6 CB MR from eminence
general manager & head designer at nexus-acoustics research
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Dr Burnz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dr Burnz Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 11:19am
what dispersion are you aiming to achieve? Would you not get some phasing problems if you were to walk from left to right? I guess which line array would you not get that problem... Looks good though, Very compact!
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 11:22am
I would like to achieve about 90-100 degree horisontal dispersion

about the phasing problems:.... well, a perfect loudspeaker is yet to be invented... until then we'll work with the technology we have
general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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miniphil View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote miniphil Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 12:18pm
Sorry to rain on the parade, but this is a bad idea. Line arrays HAVE to be flown, otherwise the sound sh*te.

Designing the flying hardware and making it safe, so that you can adjust it to the nearest degree (at least) is not a trivial job.
GO YOU BIG RED FIRE ENGINE!!!
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 12:25pm
nobody said anything about them not being flown
general manager & head designer at nexus-acoustics research
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miniphil View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote miniphil Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 12:35pm
Sorry to rain on the parade, but this is a bad idea. Line arrays HAVE to be flown, otherwise the sound sh*te.

Designing the flying hardware and making it safe, so that you can adjust it to the nearest degree (at least) is not a trivial job.
GO YOU BIG RED FIRE ENGINE!!!
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moray james View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote moray james Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 12:54pm
wondered if you had seen the Beyma comp driven line array drivers? WL5, WL4 and WL3. Will run from 800Hz, up to 20KHz. Regards Moray James.
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 01 November 2006 at 12:58pm
I've seen them, but they are a bit expensive , and do not offer any benefits when compared to the P-audio combination
general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research

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