DIY Compact line array

Ok here is the idea that we can work it out.
After making some line array boxes that didnt turned out bad at all i am planing to build a more compact one just for easier handling.

Here is a draft plan

Mylesound asked me in another topic about the HF guide. I didnt have the money to buy the P-Audio PH 14525 so i have build a wooden wave guides. I know that they are not ideal but that is the compromise  we always make when money are tight.
This was my starting idea of what the horn has to look like
Except mine are 28cm long and horn opening is 13cm high and 2,6cm wide. Two of those are fitted vertically in one box.






And a few pictures of the building process



And one in action



Edited by MarjanM - 31 March 2008 at 6:03pm

Edited by staiper - 31 March 2008 at 8:08pm

Mylesound, it is not that expensive around 50EUR but for 12 boxes it needs 24 of them. So that will be like 1200EUR.
All i need for those boxes are better HF drivers. BMS 4550 would be ideal. It can be crossed at 800Hz.

Stipe, thanks for the advice man :-)

I have never seen a P-Audio line array. Any link?

If they are placed apart within 1/4 wave of the highest frequency they are playing they will couple well. When you achieve a long enough array (around 2m) they significantly gain in vertical directivity. That is the whole idea of the line array's reduced lose in gain over distance.

ME102 can be used in this kind of box. You will just have to use appropriate 1inch driver that can go down to 800-1000Hz and that will be BMS drivers.

If we use a Nexo trick (as used on GeoS) it can be two way box with just the 12 and 2-3 HF drivers crossed at 800Hz.

so the end................

just like other line array threads

I don't know why still alot of us here don't fancy line arrays................

is it because of SAFETY in flying..............or.........BUDGET...........

what about ground stacking these craps vertically................with some use of scafoldings (correct my spelling pls. if I mispelled the word) ...




Edited by heinrich - 03 April 2008 at 3:10am

Well if you look at the drivers in my boxes it is not that the budget is a problem.
I have 2 Delta12A and 2 PSD2002 in them. So that cost me around 220 Eur for drivers per box.
That ain't too expensive. I just need to upgrade the HF part with BMS4550 and that will be 320 EUR per box including the deltas.

For the box like in the drawing above i was planing to use:
One Delta 12A - 55 EUR
Two Alfa 6 - 60 EUR
Two BMS 4550 - 210 EUR

Total 325 EUR

If budget is allowing a better 12 and 6 inch drivers can be used.

They can be ground stacked or flown.
I dont think that rigging equipment will cost me more than 50 EUR per box.