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Discussion Starter · #1 ·

Hi all, newbie from Ireland here and I could do with some help. I'm starting a travelling inflatable Cinema tent for Kids parties/adult movie nights. The tent will seat around 20 and will be 7meters long 5 meters wide and 4.5 meters high. Money is tight so I've gone for the Benq 1070 projector which fits my Budget. In order for this to work I will need as large a projection I can to give it a real movie experience feel. I've worked out that my screen will need to be 528cm diagonal( 259cm high 460cm long) and the projector will be 600cm from the screen. I plan to use a blu ray dvd player with a home cinema sound system. My problem is that I will need to build a mobile screen which will have to be capable of being packed away in limited space. I checked YouTube and found a clip of a dude using white spandex/Polyester to make a portable screen pulled over plastic piping.. Can anyone give advise on what is truly the best material I could use for showing HD movies this way. I have thought about silver spandex base layer with a brilliant white quality spandex/polyester layer over this.Ive no Idea if this would make a difference but I need the picture to be as good as possible. Anyone with any input, advise or possible pitfalls I am not thinking of?
 

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Have you seen the inflatable screen setups? Assuming your events would be at night, and not in rainy weather, an open-air theater would be a lot easier...


Example:




from www.outdoor-movies.com
 
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Discussion Starter · #4 ·

This is not an option in Ireland we get 4 weeks good weather if were lucky. Its going to have to be within my inflatable tent and if we get a run of good weather this might be a plan.
 

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[/quote]
Quote:
Originally Posted by gec5741  /t/1520166/help-and-advise-needed-setting-up-a-cinema-tent#post_24418286


That screen is awsomely huge jautor!

Not me or my screen!

Quote:
Originally Posted by Bigkick  /t/1520166/help-and-advise-needed-setting-up-a-cinema-tent#post_24418433


This is not an option in Ireland we get 4 weeks good weather if were lucky. Its going to have to be within my inflatable tent and if we get a run of good weather this might be a plan.

I wouldn't use the inflatable inside a tent. But one with a frame stabilized with some sandbags would work.

http://www.elitescreens.com/index.php/en/products/portable-68272/26-elite-quickstand#4-dimensions
 
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if you can only afford a 2000 lumen projector, you better scale down your screen size. Even in total darkness, there won't be much light left by the time you spread that across a 17' diagonal screen from over 19' away.
 
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Discussion Starter · #7 ·

Price for this is close to $500 and that's before shipping and Tax/Vat to Ireland so again not an option. I feel that DIY is the cheapest and most suitable way for me. Im pullin my hair out on the internet trying to get answers.
 

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Discussion Starter · #8 ·

This is my problem the Benq guide says it can project at this distance so this is all I have to go by. If I go much smaller than my original screen size my cinema tent risks becoming just a big t.v in a tent rather than a Backyard Cinema experience. Does anyone have any recommendations for any other projector within reason that might do the job better?
 

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Quote:
Originally Posted by Bigkick  /t/1520166/help-and-advise-needed-setting-up-a-cinema-tent#post_24418779


Price for this is close to $500 and that's before shipping and Tax/Vat to Ireland so again not an option. I feel that DIY is the cheapest and most suitable way for me. Im pullin my hair out on the internet trying to get answers.

I was just pointing to an example. Certainly DIY will be cheaper. But if you plan to set-up / tear down and travel with this gear, you should absolutely look at how the "pro" gear is built and assembled so you can apply that knowledge to your DIY solution. Note how their screen frames break down into a set that can be carried in a bag by one person...
Quote:
Originally Posted by Bigkick  /t/1520166/help-and-advise-needed-setting-up-a-cinema-tent#post_24418812


This is my problem the Benq guide says it can project at this distance so this is all I have to go by. If I go much smaller than my original screen size my cinema tent risks becoming just a big t.v in a tent rather than a Backyard Cinema experience. Does anyone have any recommendations for any other projector within reason that might do the job better?

Just realize that IF there was a cheap projector with tons of light output and excellent contrast - we all would have bought it... But in reality, you'll have to pick any two of those.


Jeff
 
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not sure of the whole big picture in this installation, but from what I remember, the party (if that's what this is about) is more about the atmosphere then the technology. Circa 1990, I remember stopping traffic and attracting many pedestrians (and discussing the situation with the Indiana State Patrol) in Speedway Indiana the Saturday night before the Indy 500 on the highway leading to the track with nothing more than a school bus with a sheet on the side and a 2nd generation Sharp LCD projector (capable of no more than 500 lumens at it's current bulb life). "Animal House" and "The Incredible Mr. Limpet" were the double feature.

Atmosphere is everything...... some trivia slides (from the Theater Accessory forum?), and a few strips of remote dimmable LED lighting can go a long way can make up for some short comings in the video presentation.

search iowa city magic bus for what evolved from those early road trips
 
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Discussion Starter · #11 ·

I am a complete beginner to projectors so please excuse my ignorance in all this
Am I to believe that the higher the lumens and contrast according to the manufactures the better chance I have of getting my big picture? I have seen some home cinemas online which were as big as I need but the projector model was not mentioned or available. Anyone know of a model that can handle the heat
, I may be able to stretch my budget if needs be? I understand the atmosphere is key and I think I will have this sorted but to get people interested in making that first Backyard cinema rental jump I think the screen size may be a key selling point. 
 

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It was that "rental" word that jumps out - if this will be a business venture, the image quality will need to be better than "acceptable for friends to watch"...


By the way - you should check out the Outdoor Theaters forum three down from here - lots of info there you might find useful.



Jeff
 

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Discussion Starter · #13 ·

So things are starting to come together with my Cinema tent. I made the jump and went for the Acer H6510bd due to its high lumens. screen size and fitting the budget. I gave it a trial run off my computer and I am more than impressed cant wait to see HD and 3d on it. I had my 8oz popcorn machine delivered and I am in negotiations with a company in China for them to build a blackout inflatable tent 7m x 4m x 3.5m high. I have designed a portable screen 4m long made from good white spandex over a silver spandex supported by a PVC pipe frame. This keeps me in budget and allows me to dismantle the screen and store in a small space. But now I am trying to work out how to do or what to do for my sound. I am jumping between an AV amp with 2 large speakers and sub or a mid range 2.1 home cinema package, sound bar and sub. I don't need very high spec sound detail just enough bang for that cinema feel, any ideas? As the tent will be run off extension cables from the house I am trying to keep the amount of power points needed down. As people will be renting this tent for kids/adult parties to mainly watch movies and play games I need to be able to set everything up Blu Ray player/ Games console for them before I leave them to run their own party. My other problem is that the only sound input on the projector is a 3.5mm jack there is no optic line so does this limit what sound system I can attach? I need the speakers to play sound from anything shown on the projector without and need to plug or unplug cables or devices ( it would cause trouble for people doing it on their own) Anyone any more advise or see any problems I am missing?
 

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The limitations of only having analog audio out of your projector and need to keep operations simplified pretty much dictate that you aren't doing surround sound. (unless you are willing to interject some sort of home audio surround receiver into the system to handle surround decoding and source switching)

Your bass reproduction is going to be the tricky part in that big tent. Maybe look at a four channel amp with built in crossovers and as big of bass cabinet as you are willing to haul around, or make do with an active sub and figure out how to run a hum-free low level signal to it. (along with another power cord). Guess you have to figure out how to balance the desire for a satisfactory "thump" with not creating a noise ordinance violation issue for your clients.
 
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Discussion Starter · #15 ·

What are these built in crossovers you speak about? I am not worried about  noise the law in Ireland is relaxed you can only get in bother if you have noise going on for a period of time like every day over weeks, but one off parties/Movie nights you can do as you please.
 

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a crossover is a frequency based audio filter. There are active crossovers that are installed before the amplification stage or passive crossovers that go between your amp and speaker. (usually built into the speaker) This is what sends the highs to the tweeters and the bass to big drivers. You don't want your bass speaker trying to reproduce midrange and high frequencies too. Many commercial amplifiers and all surround receivers will have this feature built in. This feature may be referred to as a "low pass" and "high pass" filter. A four channel amplifier with both high and low pass filtering that lets you mono sum (combine right and left together) the bass channels to double the power to one subwoofer would be an ideal choice for you. If you can find separate amps for mains and subs for less money, other than the added bulk, that could be wonderful, too.

Amplified subwoofers will usually have a crossover built in, often with variable frequency adjustment for the crossover point so you can send it a "full range" signal and let it filter out the high frequencies you don't want it trying to reproduce. (150 Hz and up typically. the frequency selection has a lot to do with the capabilities of your main speakers)

Kewl that you folks can have a good time without somebody getting offended and calling the cops like so many partypoopers in this country.
 

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Discussion Starter · #17 ·

Jesus I am out of my depth what sounds simple to you guys is like a foreign language to me, time to get  researching again. I am surprised to hear you have the cops bothering you if you have the odd bit of noise from a party or backyard movie night, if you want total peace and quiet don't buy a home where you have neighbours off to the mountains with you. Over here you pay for your home so you are entitled to use it how you wish as long as its not every night of course. Thanks for your help keep any ideas coming. Over here people are putting new movies on flash drives any idea how I can get these to play on my projector with that good sound im hoping to have? Can I play them through a BLU ray DVD player or Amp?
 

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I would think any Blu Ray or DVD player with a USB port would work for your flashdrive idea as long as it was compatible with the file format you saved your movie as.
 

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Discussion Starter · #19 ·

Hello again, so things are moving well with my cinema tent but im a little stuck with my speaker set up. Here is what ive got at the moment.. A Yamaha RX-V375 receiver and a Phillips BDP5600 blu ray player with an Acer 6500 projector but from reading this forum I think its not just a case now of buy a speaker set and off I go. What I need to know is what power speakers do I need for this amp or what is the highest I can go in watts? The manual says 1 channel 100w and 7 channels 70w but does this mean I cannot put lets say 4 100w separate speakers connected to it or can I just attach any watt speakers to it ? any budget ideas for speakers for this amp that will give good loud sound for a cinema feel? I have been looking at budget tall standing speakersx4 then thinking of a separate centre and sub, or do I even need a sub with what I have planned? Do I need to even bother with 5.1 surround sound if good old fashioned stereo would do? Help.....im out of my depth!   
 

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The dilemma with a rental system and stereo VS surround is dealing with the default audio track on most DVDs being the surround track. Your blu ray player may be able to be setup for stereo output only, otherwise your user will need to go into the DVD menu at the beginning of the movie and select the two channel track, otherwise you will be sending audio info to speakers that don't exist, especially center and sub (or LFE, low frequency effects).

If the intent is movies, find a way to do a 5.1 system. Your front three speakers should all be the same model, don't think that a pair of towers and tiny center channel will work. Your center channel is doing most of the work up front as far as dialog goes, it has to keep up with the other two.

The power handling rating of a speaker is like a capacity rating. It reflects the maximum amount of power your amplifier should be capable of sending it. A higher power handling rating has nothing to do with how loud the speaker will play or minimum size of amp needed to drive it. That is efficiency, which is also going to be listed by any good speaker manufacturer. Higher is better. It is a measurement of how loud the speaker will play given 1 watt of power, measured at a distance of 1 foot. everything standardized.

In your situation, any speaker rated to handle at least 100 watts and an efficiency of over 90 should be OK. A horn tweeter would probably be a good thing in this situation (and 8 ohm only, you'll probably be running this loud and you don't want to overwork that receiver anymore than you already will) Not sure what brands you see for speakers over there (besides Tannoy) but maybe look for some Klipsch, BIC, JBL or Yamaha.

All that leaves is bass. You're not gonna like to hear this, but reproducing bass in a large tent is going to take the ability to move a serious amount of air, and that ain't going to be cheap. One 8" home theater subwoofer is going to get totally lost in that space.

Whatever you buy, get as big of driver with as much amplification behind it as you can afford, then save up to buy three more. Don't forget, this special speaker will either have its own built in amplifier, requiring an electrical outlet, and an appropriate patch cord to connect to the Yamaha receiver.
 
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