Compact Line Array |
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PedroQ
Registered User Joined: 17 July 2010 Location: Portugal Status: Offline Points: 17 |
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Posted: 23 July 2010 at 12:01am |
Yesterday came the idea to build a small PA for use in small events like karaoke, djs, weddings, etc.
Researched existing models for five minutes, and none had the features I wanted. The PA must be line array, very small, very light (less than 5 kg per cab), cheap and efficient. Today I spent another 5 minutes trying to idealize the box, and made a small drawing (in powerpoint because I had no CAD software on the laptop. So the measures are not stringent). I have not done (yet) tests or measures to see more efficient ways, but I'll probably have to add some vents. The speaker I chose for the mids was Sica 6N2.5PL with 250wrms but probably would sound better with a Beyma 6MI100 of 250wAES. BOTH of 6 inches. And for the HF a Dayton planar tweeter of 80wrms. What do you think about the idea? Edited by PedroQ - 23 July 2010 at 12:02am |
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MarjanM
Old Croc Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7810 |
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Are you sure it will be under 5 kilos?
Now that looks good actually but 6 inch cant really do well under 200Hz. Maybe not even that. Also you will need about 10 boxes in a row in order to act as a line array. So try double 6 and a horn. That will do some more damage in a not spl demanding gigs. |
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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PedroQ
Registered User Joined: 17 July 2010 Location: Portugal Status: Offline Points: 17 |
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The Sica 6" woofer have a freq response of about 120hz to 7khz (+/-) , so i think it can go 200hz well. about the weight ... the woofer is neodymium with 1,65 kg.
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PedroQ
Registered User Joined: 17 July 2010 Location: Portugal Status: Offline Points: 17 |
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I've done some calc's and if i use a vent tunned to 113hz and reduce the woofer compartment to 2,7 lt I can reach the 120hz without big gain losses.
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MusicXtra
Registered User Joined: 05 August 2009 Location: Netherlands Status: Offline Points: 249 |
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Have you seen the 18sound 6ND430?
This one is 200 Watt AES and the FS is 63 Hz so it wil work from 60 Hz. |
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PedroQ
Registered User Joined: 17 July 2010 Location: Portugal Status: Offline Points: 17 |
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I Have seen it, but put it apart because i can't find it any "Portuguese online store" and so i cant know a price for it, but i would contact some stores requesting prices for 6ND430.
Edited by PedroQ - 23 July 2010 at 4:24am |
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PedroQ
Registered User Joined: 17 July 2010 Location: Portugal Status: Offline Points: 17 |
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The 18sound is more appropriated to this box, can go to 87hz in -3db. Sica only can go to 110hz in -3db.
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Mircea Bartic
Old Croc Joined: 18 February 2005 Location: Romania Status: Offline Points: 2581 |
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what is the intended crossover point?
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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Tony Wilkes
Old Croc Joined: 02 August 2004 Location: West Midlands Status: Offline Points: 4840 |
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If you think that any pro 6" driver will do -3db in the 80's when stuck in the air you are deluding yourselves. I don't care what the simm's say, build one and measure it!!!
Tony |
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tomschute
Old Croc Joined: 15 May 2006 Location: Mid Wales Status: Offline Points: 1817 |
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http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=275-085&ctab=1#Tabs
Great find. Wonder if it will work? I was on a similar project mission that stalled as I was finding the time it was taking to fine tune my own HF line array horn was just too great and put it all to one side. Maybe this would be an option for a compact system. Tom |
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Out to lunch... stableaudio@hotmail.co.uk
www.stableaudio.co.uk Speaker Building Services |
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Tony Wilkes
Old Croc Joined: 02 August 2004 Location: West Midlands Status: Offline Points: 4840 |
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Tom, not if you want to use best practice. Cross-over way too high, max'm output is way too low. They may be good in home hi-fi, monitor's etc. but LA's no. Tony |
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tomschute
Old Croc Joined: 15 May 2006 Location: Mid Wales Status: Offline Points: 1817 |
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Back to the mic and PC then :/
Might grab one and take some measurements out of interest though! |
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Out to lunch... stableaudio@hotmail.co.uk
www.stableaudio.co.uk Speaker Building Services |
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