can we use Fostex Horn tweeter for Cinema Theatre use?

rhythmsandy · 15th January 2013, 07:28 PM

http://www.madisound.com/pdf/fostexdrivers/t90arev.pdf

can this be used for big cinema Theater Left Centre Right speakers?

VECTORDJ · 15th January 2013, 09:05 PM

Hi, This can be used as a super tweeter crossed over above 8000 hz with a 1.5 mfd cap or so. You would do this if your speakers are not bright enough. This product would be a bad choice as the main high horns. Most theater systems use a crossover point of 500 Hz to 1250 Hz and need a heavy duty large format driver like EV DH1, JBL 2446, Radian 850, etc If the main hi horns are out just have these repaired. Bye, VECTORDJ

Zolof911 · 5th February 2013, 09:06 AM

Vectordj is right on the money, the Fostex T90A is a supertweeter. If using a passive crossover, I'd choose a steeper slope than the 6db/oct a single cap provides. My preference is 24db/oct, but this takes many components to realize in passive. If using an active crossover, use a cap also, but choose one whose crossover frequency is below the intended crossover point, to serve as protection against mishaps. A tweeter such as the FostexT90, or the JBL 2402 does not have much tolerence for out of band signal.

15th January 2013, 07:28 PM	#1
rhythmsandy diyAudio Member Join Date: Aug 2012	can we use Fostex Horn tweeter for Cinema Theatre use? http://www.madisound.com/pdf/fostexdrivers/t90arev.pdf can this be used for big cinema Theater Left Centre Right speakers?

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15th January 2013, 09:05 PM	#2
VECTORDJ diyAudio Member Join Date: Oct 2011	Hi, This can be used as a super tweeter crossed over above 8000 hz with a 1.5 mfd cap or so. You would do this if your speakers are not bright enough. This product would be a bad choice as the main high horns. Most theater systems use a crossover point of 500 Hz to 1250 Hz and need a heavy duty large format driver like EV DH1, JBL 2446, Radian 850, etc If the main hi horns are out just have these repaired. Bye, VECTORDJ

5th February 2013, 09:06 AM	#3
Zolof911 diyAudio Member Join Date: Feb 2013 Location: Connecticut	Vectordj is right on the money, the Fostex T90A is a supertweeter. If using a passive crossover, I'd choose a steeper slope than the 6db/oct a single cap provides. My preference is 24db/oct, but this takes many components to realize in passive. If using an active crossover, use a cap also, but choose one whose crossover frequency is below the intended crossover point, to serve as protection against mishaps. A tweeter such as the FostexT90, or the JBL 2402 does not have much tolerence for out of band signal.