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lack of top end

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Aaronski View Drop Down
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    Posted: 03 November 2013 at 5:37pm
some one educated me on comp and horn selection please
I understand the horn dispersion on 122's should be 60x40 and thats way im using the p audio 2723.
i am using the beyma cp750ti comp but im getting a lack of response above 9k
why is this, wrong comp im guessing?
but why?
corr that sounds well good, how many k is it pushin? what amps you got? turn it up abit mate.
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 03 November 2013 at 9:46pm
It will need EQing to get the sparkle, what are you applying?

Tony
www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)
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kevinmcdonough View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kevinmcdonough Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2013 at 1:39pm
hey

yeah all compression drivers need some EQ at the top end to compensate for the effects of the CD horn, google CD horn EQ and you'll get some ideas.

k
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Artical Kulcha View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Artical Kulcha Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2013 at 2:00pm
True, with comp's and horn

yes higher the frequency lower the efficiency, so will need a bit of EQ to make up for this.
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Aaronski View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aaronski Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2013 at 6:34pm
comp is playing 900hz up
EQ for the top end, iv got +5db 12/oct high pass @8.5k
how much can i boost it?
any recommendations? 
corr that sounds well good, how many k is it pushin? what amps you got? turn it up abit mate.
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kevinmcdonough View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kevinmcdonough Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2013 at 6:40pm
hey

As you get closer to a compression drivers top end it naturally starts to beam and be less efficient. The compression driver CD (constant directivity) horn then takes what is a smaller amount of sound to start with an spreads it out even further trying to counteract the beaming and make it stick to the coverage pattern, diluting it even more. So there are some fairly specific requirements needed to help even this out and boost the top end to make it flat again.

Its an actual thing that needs compensated for on all comps and horns, be it by the passive internal crossover or by the active external one.

As I said if you google constant directivity horn EQ you'll find loads of info and suggestions, for example.....Smile

http://www.peavey.com/support/technotes/soundsystems/horn_eq.cfm


k


Edited by kevinmcdonough - 04 November 2013 at 9:13pm
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Aaronski View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Aaronski Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2013 at 9:09pm
cheers guys, ill do some research and prob be back with more questions ;)
corr that sounds well good, how many k is it pushin? what amps you got? turn it up abit mate.
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