Array of 12 tweeters in 3x4 configuration for Cinema?

rhythmsandy · 23rd December 2012, 05:55 AM

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, 11:40 AM

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, 03:58 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, 03:58 PM

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

JMFahey · 23rd December 2012, 05:01 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, 05:30 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, 02:22 AM

Quote:

Originally Posted by sreten

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, 08:09 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, 11:13 AM

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, 04:33 PM

Quote:

is it possible to use the mids just like tweeters in the 3x4 config?

No, but you can use them as mids.

23rd December 2012, 05:55 AM	#1
rhythmsandy diyAudio Member Join Date: Aug 2012	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?

23rd December 2012, 05:30 PM	#6
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

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23rd December 2012, 11:40 AM	#2
JMFahey diyAudio Member Join Date: Mar 2009 Location: Buenos Aires - Argentina	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.

23rd December 2012, 03:58 PM	#3
rhythmsandy diyAudio Member Join Date: Aug 2012	I believe using them in high column 12 will give more comb effect than the flatpanel I will definitely arrange on an arc...

23rd December 2012, 05:01 PM	#5
JMFahey diyAudio Member Join Date: Mar 2009 Location: Buenos Aires - Argentina	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.

24th December 2012, 11:13 AM	#9
rhythmsandy diyAudio Member Join Date: Aug 2012	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?