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TOPIC: Speaker placement

Speaker placement 18 Jul 2001 10:30 #20967

  • Mike
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We're installing a surround system in a theatre formerly known as MONO and our techie reccomended the following. The room is 59' long and he started the first speaker at the mid point (30) and then placed another at 20 and 10 and 2 on the back wall. I wondered about the front of the house and he said that in earlier times they ran them evenly down the room but now the belief is that mid point and back works best. What do you say?

Mike Hurley
www.bigscreenbiz.com
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Re: Speaker placement 18 Jul 2001 13:52 #20968

  • John Pytlak
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Check out the JBL site for information on speaker placement:
http://www.jblpro.com/

Or QSC:
http://www.qscaudio.com/

Or THX:
http://www.thx.com/theatres/sound.html

Or Dolby:
http://www.dolby.com/tech/

John P. Pytlak, Senior Technical Specialist
EI Worldwide Technical Services
Research Labs, Building 69
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
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Website: http://www.kodak.com/go/motion
John P. Pytlak, Senior Technical Specialist
Customer Technical Services
Entertainment Imaging
Research Labs, Building 69, Room 7525A
Eastman Kodak Company
Rochester, NY 14650-1922
Telephone: +1 585-477-5325 Fax: +1 585-722-7243
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Website: http://www.kodak.com/go/motion
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Re: Speaker placement 19 Jul 2001 22:16 #20969

The THX design rule is the front most surround speaker is to be place back from the screen 1/4 of the length of the room
Dolby specs the minium of 1/3 the length
I use a very expensive cad program called EASE to layout arrays since the goal is to provide a non directional even sound field.
A old rule of thumb is the distance above the floor is the distance apart
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Re: Speaker placement 20 Jul 2001 14:00 #20970

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Of course, when trying to figure out how high to place your surround speakers, I always try to get them out of reach of the children, especialy the 6'5" children.
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Re: Speaker placement 20 Jul 2001 19:15 #20971

  • Mike
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This is not digital. My guy, he is a GOD by the way a true techie Hall of Fame Bill from Boston Light and Sound, says due to it's an SR you start at the center line. He's GOD but I'm still checking. If I could figure out the danged JBL site it would be no problem!

Mike Hurley
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Re: Speaker placement 20 Jul 2001 22:14 #20972

The centre line is far to far back to start
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