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trolly soundsystem - mini line array - WITH PHOTOS
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davey t View Drop Down
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    Posted: 08 June 2009 at 10:56pm
Just thought i'd share this with you...

So i've been commissioned to re-build a 12v soundsystem mounted on a trolly for an act which tours various festivals in the uk. I'm using a lot of the design from my 12v mobile disco system i did last year but with some differences. 

They play a lot of rock and talk a lot over the system so the mids have to be really clear. Also people gather round in a semi-circle so it has to be very wide dispersion. Also shouldn't block the view of them.

Last time I used PA horns from skytronic but i'm worried about the dispersion and clarity. So this time i'm going to build a mini line array covering 250hz to 2khz. I'm going to use ten 4" drivers per side then a compression driver on wide horn for the treble. Using lots of smaller drivers also means you can put more amplifier power in from a 12v rail without needing to boost the voltage. 

4" drivers will give a seperation of 10cm which should be ok up to around 2kHz right? 

This is the double 15" kappalite 3015 loaded bass. Worked a charm last time. This time i've made it a manifold to try and protect the drivers a bit more and strengthen the box etc. 

Here's some eye candy for now. I'l keep you updated. 






Edited by davey t - 22 June 2009 at 10:59pm
Minirig portable soundsystem movement
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studio45 View Drop Down
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Points: 3881 		Post Options Post Options   Thanks (0) Thanks(0)   Quote studio45 Quote  Post ReplyReply Direct Link To This Post Posted: 08 June 2009 at 11:27pm
oo and indeed er. looking forward to seeing that :)
Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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rich_gale View Drop Down
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Points: 2697 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rich_gale Quote  Post ReplyReply Direct Link To This Post Posted: 08 June 2009 at 11:47pm
awsome.  cant wait to see the line array mid high section.
REFLEX ALL THE WAY.... (however, im playing with horns again...) That ok Mister Valiant? :)
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_djk_ View Drop Down
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Points: 5992 		Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 10 June 2009 at 10:57am
http://www.lowes.com/lowes/lkn?action=productDetail&productId=87378-000073428-68001&lpage=none
djk
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davey t View Drop Down
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Points: 1428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2009 at 10:48pm
I'l let the photos speak for themselves





They sound amazing. Really efficienct and clear and LOUD. Very hifi.

If you're at Glastonbury this week make sure you make your way over to Avalon between 3 and 6 to check them out!
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rich_gale View Drop Down
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Points: 2697 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rich_gale Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2009 at 11:17pm
very very awsome indeed!  whats your external power source?  and i like the mini hf horns - are they custom? loving the colour scheme.


Edited by rich_gale - 22 June 2009 at 11:19pm
REFLEX ALL THE WAY.... (however, im playing with horns again...) That ok Mister Valiant? :)
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jethrocker View Drop Down
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Points: 1942 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jethrocker Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2009 at 4:53am
Very striking, looks wicked :) Liking the (active?) crossover panels.
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toiminto View Drop Down
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that system looks sweet indeed! What's the height of the arrays? Can't really tell from the pic.
http://soundcloud.com/toiminto
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davey t View Drop Down
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Points: 1428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2009 at 8:44am
Originally posted by rich_gale rich_gale wrote:

very very awsome indeed!  whats your external power source?  and i like the mini hf horns - are they custom? loving the colour scheme.

The line array speakers run off 12-24V dc with an active crossover seperating the mids and HF. There's also a switch which youy can turn the low cut for the mids on or off. Very useful if you want to run them full range or with a bass bin
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darkmatter View Drop Down
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Points: 2419 		Post Options Post Options   Thanks (0) Thanks(0)   Quote darkmatter Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2009 at 2:38pm
very very very nice.

I'm going to paint my speakers orange tooSmile

I wish I had your knowledge of building active crossovers.
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Meat View Drop Down
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Points: 1513 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meat Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2009 at 3:19pm
Looks sweet Dave. Loving the colour.
Don't test the champignon sound
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biotec View Drop Down
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Points: 2932 		Post Options Post Options   Thanks (0) Thanks(0)   Quote biotec Quote  Post ReplyReply Direct Link To This Post Posted: 23 June 2009 at 3:25pm
I have been using high power DC connectors made by a company called anderson.
 
They are generally used for charging vehicles such as forklifts and jump starting race cars. The military use something similar so that the DC electrics in comms vehicles can be powered by an external power source when the engine isn't running.
 
They are a very safe way of connecting a DC power supply to a consumer and I think they would work very well for 12v sound systems where the batteries are in a sepaarte unit to the amps. I am not aware of a flange/bulkhead mount connector though.
 
They make them in a variety of amp capacities.
 
 
You need a crimper to connect the cables to them but if you don't want to buy one you could get an autoelectrician to crimp them for you. I have a big hydraulic crimper if you ever need to do very thick cables. I recently did some 95sqmm battery cable for my truck!
me so horny, me love you long throw.
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