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Topic: Help! Movies in the Park!
Joined: Apr 10, 2015
Posts: 2
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So I took on this project. Movie in the park. All I want is to break even. I have a 2300 lumens sharp XR-30X and a BenQ SP820 that I'll be showing on separate 9'x16' wide screens. I've already tested the Sharp. Looks awesome. Theyll be side by side playing the same film. Now my bigger dilemma. Open park setting, maybe up to 1000 people or more. I have about 600W worth of PA, and I'm told I need probably 6 subs and 2 fifteen inch loudspeakers. Is this a good amount to add to this setup or can I get away with less? I'm on a limited budget and not charging for this community event. Probably around 800-1000 people for the first event. 500 or so for each of the next 3. Help!
Joined: Mar 28, 2005
Posts: 13,311
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...and I would tell you that the projectors you are using are horrendously under-powered for your setup.

Look, if this is all budget based, then you have to do your own leg work to determine if what you have is enough. The screens are almost 150 square feet, and THX calls for about 16-18 lumens per square foot to fill any screen. 16 times 150 is 2,400 lumens. So if the projectors can actually deliver that much light output, which is extremely unlikely, then you are in the area you need to be.

But you are using 4:3 projectors, with 16:9 screens.

XR-30X - 1024x768 resolution - 2300 Lumens (advertised) - 2007 model

SP-820 - 1024x768 resolution - 4000 Lumens (advertised) - 2007 model

Now, you say you 'tested' the Sharp, but did you test it at the size you intend to use it at, in the conditions you intend to use it in? How about the BenQ? You throw out 33% of the light when you go to 16:9 because you are only working with 1024x576 resolution. That's about half a million pixels, and realistically, about 500-800 lumens you may have available. About 1/3rd of what is recommended as a dark movie theater standard. With 1080p as the current standard, you also have about 1/4 the pixels available to you, and are using extremely outdated business class models which won't help image quality at all.

For sound? I think that you haven't mentioned what any of your gear is. 600 watts of power? From what gear? What is the speaker efficiency rating? How much audio does it actually deliver? What do you expect from the sound?

Watts are a measurement of power, not of sound. It's hard to have to much audio, but getting a couple of good quality commercial loudspeakers is certainly a good thing to have. Adding subwoofers is nice if it is possible, but building a nightclub outdoors is very pricey due to dispersion of the sound. You also have to consider who else may be impacted by the sound and what permitting may be required for that sound.

I would start at the start. Take what you have outside. Throw an image as large as you intend to use (16' wide!) on a wall, on a bed sheet, on something white. See how it looks. Feed it actual video material from your laptop or whatever you intend to use, and connect that to the speaker.

See how it sounds and listen to how it looks.

If you are happy, then that's all that matters.

But, if your test was a 100" diagonal image in your home, then that's not going to cut it when you want an image that's over four times the size.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
Joined: Apr 10, 2015
Posts: 2
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It was tested on a 16'x9' Flexigray Carl's Place outdoor film screen, which I've been renting with the Sharp in my inflatable business for outdoor films with my small Powerwerks PA system. Each cab has 4 4" woofers and a driver, and the powered 12" sub is 400 watts. I've gotten nothing but rave reviews on the screen and the projector every time I've rented it in the last 2 years. I've also watched football games on it with friends. Sharp, clear picture outside every time. That said, I bought the sp820 on Craigslist and have found it to have a maladjusted light tunnel. I'm literally adjusting it as we speak. If I can't get it right, I'll probably buy a 5000 lumens projector and 25' diagonal screen instead, since I'm running out of time.

I've also spoken to a guy who does this for a living for about 10 years now. He said the projectors are fine and I'll need some better loudspeakers. Thanks for the reply.