Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

PA Systems A forum for discussion of all parts of a sound reinforcement or DJ system: loudspeakers, mixers (desks) etc.

PA system for Openair Cinema
PA system for Openair Cinema
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 11th January 2020, 05:20 PM   #1
Phenoholic Anonymus is offline Phenoholic Anonymus
diyAudio Member
 
Phenoholic Anonymus's Avatar
 
Join Date: Dec 2013
Default PA system for Openair Cinema

Hi,

I am working on a Open Air Cinema. The field is 19 meters deep. Max 450 visitors will sit in a 80 degree "fan" from the screen. The speakers have to be set up every night. No possibility to rig them, they would be gone the next day...

My initial idea to get at 85dB @2/3 of the field with 20dB headroom: A pair of 18Sound Coax 15NCX750 drivers in a ported cabinet -3dB 50Hz. And a QSC RMX 4050A amplifier 2 x 850Watt @8 Ohm, to power the speakers. I have an Oppo to take care of the signal processing aka make stereo from the LCR signal. And protect the speakers from anything below 50Hz. If the Cinema is succesfull, i can add a center channel and a subwoofer. For now i am looking for a basic way to get decent sound. I am a bit of a fullrange & coax nut. So i would like it to sound like a very good fullrange speaker. Danley would be way to expensive...

Any comments or suggestions?

Last edited by Phenoholic Anonymus; 11th January 2020 at 05:23 PM.
  Reply With Quote
Old 11th January 2020, 07:06 PM   #2
kipman725 is offline kipman725  United Kingdom
diyAudio Member
 
kipman725's Avatar
 
Join Date: Jun 2007
Location: Warrington
Send a message via MSN to kipman725
Used JBL cinema speakers on dolly's?
  Reply With Quote
Old 11th January 2020, 07:53 PM   #3
Phenoholic Anonymus is offline Phenoholic Anonymus
diyAudio Member
 
Phenoholic Anonymus's Avatar
 
Join Date: Dec 2013
I feel stupid not looking for used JBL, did not even cross my mind. On the other hand, i would be a bit worried about rain.
  Reply With Quote
Old 12th January 2020, 01:16 AM   #4
Enzo is offline Enzo  United States
diyAudio Member
 
Join Date: Sep 2004
Location: Lansing, Michigan
Your viewers would remain in the rain?
  Reply With Quote
Old 12th January 2020, 02:10 AM   #5
rayma is online now rayma  United States
diyAudio Member
 
Join Date: Apr 2011
You want to ask simon7000 about that.
  Reply With Quote
Old 12th January 2020, 01:45 PM   #6
Phenoholic Anonymus is offline Phenoholic Anonymus
diyAudio Member
 
Phenoholic Anonymus's Avatar
 
Join Date: Dec 2013
It's open air in the European summer, yes it can rain. Before after and even during the show. Thanks for the Simon7000 tip.
  Reply With Quote
Old 12th January 2020, 03:24 PM   #7
kipman725 is offline kipman725  United Kingdom
diyAudio Member
 
kipman725's Avatar
 
Join Date: Jun 2007
Location: Warrington
Send a message via MSN to kipman725
Just throw plastic sheeting over them if it starts to rain? Some drivers are coated to make them water resistant but I'm not sure the general wooden construction of DIY speakers lends itself to getting wet. When I see outdoor line arrays they usually have some effort put in to stop rain directly falling on them.
  Reply With Quote
Old 12th January 2020, 08:05 PM   #8
Phenoholic Anonymus is offline Phenoholic Anonymus
diyAudio Member
 
Phenoholic Anonymus's Avatar
 
Join Date: Dec 2013
Hi,

It's not as black and white, it can rain a wee bit for 10 minutes. Visitors can buy poncho's. I probably use a speakerfoam on the front to make it better rain resistant.
  Reply With Quote
Old 12th January 2020, 09:31 PM   #9
turk 182 is offline turk 182  Canada
diyAudio Member
 
Join Date: Oct 2012
have a look at these VM1


or is this more what your looking for outdoor pa public address sound system speaker baseball football racetrack horse arenaAH Series Stadium Horn Systems from Atlas Sound for outdoor pa sound systems

Last edited by turk 182; 12th January 2020 at 09:41 PM.
  Reply With Quote
Old 12th January 2020, 09:56 PM   #10
Phenoholic Anonymus is offline Phenoholic Anonymus
diyAudio Member
 
Phenoholic Anonymus's Avatar
 
Join Date: Dec 2013
I am looking for 80 degrees dispersion or more. And a max spl of 127 dB (RMS)
  Reply With Quote

Reply


PA system for Openair CinemaHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
3-Way home cinema de45dd Multi-Way 6 8th May 2020 09:28 PM
High End DIY home cinema System (Front + Center) Soldy Swap Meet 4 22nd March 2019 12:11 PM
JBL CS 360 home Cinema system went bang ssi Solid State 3 13th April 2018 04:36 AM
cinema amps exurbia Tubes / Valves 41 12th December 2012 09:54 AM
Need advice on attenuating a Samsung home cinema system moog10538 Subwoofers 7 25th September 2011 08:43 PM


New To Site? Need Help?

All times are GMT. The time now is 01:23 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki