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-   -   Array of 12 tweeters in 3x4 configuration for Cinema? (http://www.diyaudio.com/forums/pa-systems/226274-array-12-tweeters-3x4-configuration-cinema.html)

rhythmsandy 23rd December 2012 06:55 AM

Array of 12 tweeters in 3x4 configuration for Cinema?
 
Can I use highend scanspeak Tweeters 12 in no each with sensitivity of 92.5db in a very small array of 3x4 drivers in hardly 1 squarefoot baffle for cinema application?

JMFahey 23rd December 2012 12:40 PM

Basically yes, but don't mount them on a flat panel; they will be *too* directional, plus you will hear a horrible "comb" effect.
To reduce that, mount them as if they were on the surface of a sphere.
*OR*: mount them edge to edge in a vertical 12 high column, line array type.

rhythmsandy 23rd December 2012 04:58 PM

I believe using them in high column 12 will give more comb effect than the flatpanel I will definitely arrange on an arc...

rhythmsandy 23rd December 2012 04:58 PM

but are there any advantages of using this config than the horn?

JMFahey 23rd December 2012 06:01 PM

Line array systems avoid (ok, strongly minimize) combing problems by stacking speakers as close as possible so they behave as a line radiator, producing a single cylindrical wavefront.
Don't know what horn you are talking about, sorry.

sreten 23rd December 2012 06:30 PM

Hi,

You can do it - but that doesn't mean its a good idea - its a bad idea.
What you'll get for your money is way worse than other better options.

103dB/W is not difficult from a horn, without all the phase problems.

rgds, sreten.

rhythmsandy 24th December 2012 03:22 AM

Quote:

Originally Posted by sreten (Post 3296792)
Hi,

You can do it - but that doesn't mean its a good idea - its a bad idea.
What you'll get for your money is way worse than other better options.

103dB/W is not difficult from a horn, without all the phase problems.

rgds, sreten.

so is it possible to use a good vifa driver into horn? how much sensitivity can be achieved with horn when used with a 91 db driver? when used with a horn?

I see alot of the jbl designs where they use a 5 inch mid but with a horn resulting the 105db sensitivity! can I do that?

JMFahey 24th December 2012 09:09 AM

Quote:

so is it possible to use a good vifa driver into horn?
No, it's not a horn driver.
Quote:

how much sensitivity can be achieved with horn when used with a 91 db driver? when used with a horn?
None, it can't be used that way.

rhythmsandy 24th December 2012 12:13 PM

yeah understood that we cant use the conventional drivers in horn but is it possible to use the mids just like tweeters in the 3x4 config?

JMFahey 24th December 2012 05:33 PM

Quote:

is it possible to use the mids just like tweeters in the 3x4 config?
No, but you can use them as mids.


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