my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Maximum levels

Author Topic: Maximum levels Amanda Mundin Expert Film Handler Posts: 122 From: Belper, Derbyshire, UK Registered: Sep 2005 posted 11-17-2005 01:10 PM                     Am I right in thinking the maximum levels produced by a digital soundtrack should be 105db for LCR, 102 db for LS+RS and 115db (10db above screen channels) for LFE? And cinemas should be able to produce these levels at 2/3rds of the way back from the screen to the back wall?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 11-17-2005 05:27 PM                     basically yes as long as it was setup for 85dbc with the fader at 7 and then no one raises the fader  |  IP: Logged Samuel Hynds Film Handler Posts: 50 From: Riverside, CA, USA Registered: Aug 2004 posted 11-18-2005 09:27 AM                     When making specifications for a room: Screen channels - 103dB @ 2/3 of Screen to Last Row Subwoofer channel - 113dB @ 2/3 of Screen to Last Row Side Surrounds - 103dB @ 2/3 the Width of the Room Back Surrounds - 103dB @ 1/2 the Length of the Room With Back Surrounds - the power required for EACH channel is half of the total required for the Back Surrounds. The room is then set-up: Screen channels - 85dB @ 2/3 of Screen to Last Row Side Surrounds - 82dB @ 1/2 the Width of the room Back Surrounds - 82dB-85dB @ 1/2 the Length of the room Subwoofer channel - +10dB of Center channel. If you want the '105dB'; you will need double the power of the amplifier or add more drivers. Hope this helps - Sam  |  IP: Logged Amanda Mundin Expert Film Handler Posts: 122 From: Belper, Derbyshire, UK Registered: Sep 2005 posted 11-19-2005 06:14 AM                     Thanks for the help  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.