I built an acoustically transparent screen - Page 3 - AVS | Home Theater Discussions And Reviews
Forum Jump: 
Reply
Thread Tools
post #61 of 73 Old 01-20-2014, 08:58 AM
Advanced Member
 
erandmckay's Avatar
 
Join Date: Apr 2002
Location: USA
Posts: 736
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
As for SPL changes at certain frequencies, even without Atmos, removing the grills behind the screen should compensate for at least some of the frequency interaction with the screen. My biggest issue is finding time with other projects I have to building the screen wall.
erandmckay is offline  
Sponsored Links
Advertisement
 
post #62 of 73 Old 01-20-2014, 10:29 PM
Member
 
Phatboy69's Avatar
 
Join Date: Apr 2011
Location: Sydney
Posts: 69
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 43
Just wanted to give credit where credit is due!
Alan you motivated me to try this for myself using a similar approach for the screen!
Thanks for the details you've provided here!
You can see my calibrated results in the 120" Spandex thread.
Phatboy69 is offline  
post #63 of 73 Old 01-25-2014, 04:01 PM
Member
 
draja's Avatar
 
Join Date: Sep 2007
Posts: 21
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Can you please let me know what should be done to place a Bowers and Wilkins 683 floor standing speakers and CM center speaker behind the screen. Should Baffle board built for it? I have not build the screen yet. The wall size is 12.5' X 7' after framed. It is a 9' basement celling. The room length is 24'.
draja is offline  
post #64 of 73 Old 01-25-2014, 06:41 PM
DIY Grand Dad (w/help)
 
MississippiMan's Avatar
 
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
Posts: 15,610
Mentioned: 8 Post(s)
Tagged: 1 Thread(s)
Quoted: 438 Post(s)
Liked: 298
You will need to build supportive shelving suspends the Floor Standers above the bottom edge of the screen, and the Center Channel at approximately "Screen Center".

The screen itself should be hung so that the Speakers are at or slightly less than 2" from the inside surface.

The only reason you would need a Baffle would be because the Speakers need enclosing....or that the Screen was going to stand off the wall more than 2' and supportive shelving could not be built to be that deep.

To quote James T. Kirk;
"I'm laughing at the superior intellect"

http://www.invisiblestereo.com
MississippiMan is offline  
post #65 of 73 Old 01-26-2014, 06:05 PM
Member
 
draja's Avatar
 
Join Date: Sep 2007
Posts: 21
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Do I need the baffle even if the speaker has a enclosure? Please check the speaker in the following link.
http://www.bowers-wilkins.com/Speakers/Home_Audio/600_Series/683.html
Can you please suggest a link explain step by step instructions to make 16:9 acoustically transparent screen with 150" diagonal. The LCD projector is Epson PowerLite Home Cinema 6500 UB Projector. Basement_personal_latest.jpg 383k .jpg file
Attached Images
File Type: jpg Basement_personal_latest.jpg (383.4 KB, 30 views)
draja is offline  
post #66 of 73 Old 01-27-2014, 02:00 AM
DIY Grand Dad (w/help)
 
MississippiMan's Avatar
 
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
Posts: 15,610
Mentioned: 8 Post(s)
Tagged: 1 Thread(s)
Quoted: 438 Post(s)
Liked: 298
Are you able to suspend Floor Standing speakers on a wall? A "Baffle" can denote a constructed surface with openings and supportive shelves.

The 6500 really doesn't have the lumen output to drive a DIY AT Screen of 150" diagonal. Even at the shortest throw distance possible you will only be able to achieve 9 foot lambert of reflective brightness.

To quote James T. Kirk;
"I'm laughing at the superior intellect"

http://www.invisiblestereo.com
MississippiMan is offline  
post #67 of 73 Old 02-02-2014, 05:51 PM - Thread Starter
Senior Member
 
awblackmon's Avatar
 
Join Date: Nov 2000
Location: Boise, Id. U.S.A.
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 19
Latest on my room is I have installed both wide and high front speakers.



Watching the Super Bowl in Audessy DSX mode and the hight speakers are alive with stadium noise!

Alan in Boise
Mitsubishi 3800 projector onto 103 inch DIY AT screen.
Onkyo TX NR-818. Sound ably handled with legacy Minimus 77 and Minimus 7 speakers
DIY IB sub system. Two pairs of Dayton 15 inch and one pair of JBL 12 inch.
Power amps used are Harman Kardon Signature 2.1 Kenwood KM-X1 Hafler DH200
awblackmon is online now  
post #68 of 73 Old 02-03-2014, 07:02 PM
Member
 
Phatboy69's Avatar
 
Join Date: Apr 2011
Location: Sydney
Posts: 69
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 43
Quote:
Originally Posted by awblackmon View Post

Latest on my room is I have installed both wide and high front speakers.



Watching the Super Bowl in Audessy DSX mode and the hight speakers are alive with stadium noise!

Very nice! I look forward to doing the same in my next house with a new Onkyo 5510 or newer model when I move in about a year. (thats why my current setup was made with a temporary free standing AT screen!)
Phatboy69 is offline  
post #69 of 73 Old 09-01-2014, 01:19 PM
Member
 
turrmoil's Avatar
 
Join Date: Jul 2008
Posts: 112
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 10
Hello awblackmon and phatboy...
Not sure if this thread is still alive... however, im dreaming. Of bbuilding my own ht room with a at screen.
Your posts are inspirational and make me feel i can do it too.

My basement is unfinished. It has a 24' x 23' area covered by concrete walls on two sides. I plan to/want to build a baffle wall behind the screen to house the speakers. I have the energy RC-70 speakers 7 of them for LCR + Surround + Rear Surround.

Do u recommend a baffle in my situation?
turrmoil is offline  
post #70 of 73 Old 09-01-2014, 06:47 PM
DIY Grand Dad (w/help)
 
MississippiMan's Avatar
 
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
Posts: 15,610
Mentioned: 8 Post(s)
Tagged: 1 Thread(s)
Quoted: 438 Post(s)
Liked: 298
At 23' or 24', either amounts to a very sizable Baffle Wall, one that will demand enough support to actually obtain true "Partition Wall" status.

To quote James T. Kirk;
"I'm laughing at the superior intellect"

http://www.invisiblestereo.com
MississippiMan is offline  
post #71 of 73 Unread Today, 07:24 PM - Thread Starter
Senior Member
 
awblackmon's Avatar
 
Join Date: Nov 2000
Location: Boise, Id. U.S.A.
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 19
So just to update my room I have some more recent shots. My screen is still the same. I have no reason to change it. I have updated my speakers to prepare for Atmos or DTS:X. The wood grain speakers you see in this shot are hanging from a rail I installed on the ceiling. I have skylights that were a challenge so I decided to install a wood rail and hang the speakers.

As I have mentioned before I have built a infinite baffle subwoofer system. On the lower left of screen you can see the cover over one pair. Above the screen is another pair. A third pair is in the wall out of the shot to the left.
Attached Thumbnails
Click image for larger version

Name:	DSCF0009 2 2.jpg
Views:	2
Size:	115.0 KB
ID:	556601  

Alan in Boise
Mitsubishi 3800 projector onto 103 inch DIY AT screen.
Onkyo TX NR-818. Sound ably handled with legacy Minimus 77 and Minimus 7 speakers
DIY IB sub system. Two pairs of Dayton 15 inch and one pair of JBL 12 inch.
Power amps used are Harman Kardon Signature 2.1 Kenwood KM-X1 Hafler DH200
awblackmon is online now  
post #72 of 73 Unread Today, 07:34 PM - Thread Starter
Senior Member
 
awblackmon's Avatar
 
Join Date: Nov 2000
Location: Boise, Id. U.S.A.
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 19
Click image for larger version

Name:	DSCF0010.jpg
Views:	1
Size:	144.6 KB
ID:	556609

The skylights were a challenge but this is what I did to overcome that. I used fishing line to hang the speakers on the wood rail. You may recognize the speakers as the Minimus 7W speakers. Yeah, they are a bit beat up, but they sound great still. I replaced the caps in the Xover due to their age. I am pretty tall and with the small size of the speakers they are still above my head when I walk into the room. I have a front pair and a back pair on the rail. I ordered a speaker plate with banana plugs from Monoprice and you can see the plate near the front speaker. I ran the wire to the back speaker on top of the wood rail. You can see a cleat above the speaker. This cleat was used to place a screw up into a ceiling joist.

Alan in Boise
Mitsubishi 3800 projector onto 103 inch DIY AT screen.
Onkyo TX NR-818. Sound ably handled with legacy Minimus 77 and Minimus 7 speakers
DIY IB sub system. Two pairs of Dayton 15 inch and one pair of JBL 12 inch.
Power amps used are Harman Kardon Signature 2.1 Kenwood KM-X1 Hafler DH200
awblackmon is online now  
post #73 of 73 Unread Today, 07:50 PM - Thread Starter
Senior Member
 
awblackmon's Avatar
 
Join Date: Nov 2000
Location: Boise, Id. U.S.A.
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked: 19
Click image for larger version

Name:	DSCF0006 2 2.jpg
Views:	0
Size:	161.5 KB
ID:	556633

A different shot of the speaker rail. For now only the front pair is being used. The back pair is not in use yet. I have the front pair configured as front hight speaker for DTS NEO:X You may be able to make out a pair of speakers above the screen. They are not connected to any amps. They are just being stored there just like the top back pair. I kind of hope that there may be a future screen hight speaker with DTS:X. I have a fantasy of there being 15 speakers plus 2 subs. 17 channels altogether. That would be L/C/R behind the screen. Two wide front speakers. Two high front speakers. Four over head with a pair just in front and a pair just behind my seating position. A pair of side surround. Another pair for back surround. This may never happen but I now have all the speakers already installed for such a system.

I will be working on some sound absorbers in the spring. For now I am working on other projects around the house the wife is wanting to get done. You know how it is. I don't mind though. The house is looking pretty nice. She has a brand spanking new scrapbooking room. We are making the old room into a new guest bedroom. The second bathroom is getting fresh paint. The front entry is going to have wainscoting up soon. We are also replacing the cheap crappy baseboards the builder put in all the rooms. Busy, busy.

Alan in Boise
Mitsubishi 3800 projector onto 103 inch DIY AT screen.
Onkyo TX NR-818. Sound ably handled with legacy Minimus 77 and Minimus 7 speakers
DIY IB sub system. Two pairs of Dayton 15 inch and one pair of JBL 12 inch.
Power amps used are Harman Kardon Signature 2.1 Kenwood KM-X1 Hafler DH200
awblackmon is online now  
Sponsored Links
Advertisement
 
Reply DIY Screen Section

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off