End fired with a twist . (Nice data from the Rimini seminar).   Leave a comment

So i did get some really nice data from the measurements done in Rimini Italy .

I made a PDF explaining what happens in front and at the back of this type of an array .

A detailed post about the tech stuff can be found here : https://timobeckmangeluid.wordpress.com/2011/11/08/end-fired-sub-array-only-in-english/ . This is done however with different subs and in a virtual world using MAP on Line and RBV2-9 .

First i started out by matching the level of each part of the array at the back mic position . The reason being i had to get the max cancelation over a large area because the USW1p has to run from as low as it goes up to 125Hz to match the top loudspeaker which was a UPA1p in this case .

So the sub’s are taking care of about 2 1/2 oct where with larger tops they would run maybe up to 80Hz and then you might take the 1/4 wave-length of the frequencies you really want to cancel .

level match on S1 S2 S3 at the back mic pos

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So here is a pdf with all of the above .

End fired with a twist

Enjoy .

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