Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 3 1 2 3
Any Idea's on How to Stiffen Up a Projector Mount
#296928 03/16/10 10:28 PM
Joined: Mar 2008
Posts: 1,378
SRoode Offline OP
connoisseur
OP Offline
connoisseur
Joined: Mar 2008
Posts: 1,378
And let's get this out of the way... I don't mean rub it or play X-Rated movies ;\)

Since I've had the EP800s, I've noticed that my projector shakes a lot during LFE effects, and it is very distracting. I have a Panasonic PT-AE3000U projector and one of those ceiling mounts that is center oriented with 4 connections to the projector. I was thinking of possiblly adding rods to the 4 corners of the projector, tight against the ceiling. It's kind of weird because the speakers are sitting on the concrete foundation of the house, and the projector mount is bolted to a structural beam, so the only way it is shaking is from the air pressure, not from vibrations transferred through the floor.

Any help would be greatly appreciated!


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Any Idea's on How to Stiffen Up a Projector Mount
SRoode #296929 03/16/10 10:34 PM
Joined: Aug 2007
Posts: 3,429
Likes: 1
connoisseur
Offline
connoisseur
Joined: Aug 2007
Posts: 3,429
Likes: 1
Mark should be along soon with ideas on how to get bass to cancel for your screen using square roots... square rooms...


E = ((2M100 + VP180 + 4QS10)/(EP800 + EP500))^(ADA1500 x D2v)
N3/6xM2/4xM22/2xVP150/4xM3/2xM80/4xQS8
Re: Any Idea's on How to Stiffen Up a Projector Mount
SRoode #296930 03/16/10 10:34 PM
Joined: May 2009
Posts: 670
P
aficionado
Offline
aficionado
P
Joined: May 2009
Posts: 670
What kind of mount do you have? Is it two seperate pieces, one that bolts to the projector and another to the ceiling, and you lock them together? I have that style and I have no issues at all.

Maybe try some blue loc-tite on all the bolts on the mount (not the ones into the projector!!) and see if that helps at all, although it may not if the mount bolts are not actually coming loose.

Re: Any Idea's on How to Stiffen Up a Projector Mount
Potatohead #296933 03/16/10 10:42 PM
Joined: Mar 2008
Posts: 1,378
SRoode Offline OP
connoisseur
OP Offline
connoisseur
Joined: Mar 2008
Posts: 1,378
It is 2 separate pieces, but it is pretty tight. After many hours watching, even with the vibration, the projector is still aimed perfectly at the screen. If it were loose, I think it may have eventually slipped a bit. I had the same style when I had my Panasonic PT-AE900U and my EP500s and there was never an issue, but the PT-AE-3000U is quite a bit bigger (side to side) and the new subs put out more bass.


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Any Idea's on How to Stiffen Up a Projector Mount
Potatohead #296935 03/16/10 10:48 PM
Joined: Dec 2008
Posts: 6,928
axiomite
Offline
axiomite
Joined: Dec 2008
Posts: 6,928
For the record, I don't own or know much about projectors...BUT!!...would it not be prudent to isolate the projector somehow with something like rubber pads/grommets/gasket kind of the way you might do to your speakers sitting on the floor. I realize this is caused by air pressure, but it still might help as well as firming up the supporting structure. Could it be the sound pressure acting on the floor beams....then to the projector?...maybe some pads might help to isolate it.


Half of communication is listening. You can't listen with your mouth.
Re: Any Idea's on How to Stiffen Up a Projector Mount
SRoode #296976 03/17/10 02:34 AM
Joined: Apr 2003
Posts: 16,437
shareholder in the making
Offline
shareholder in the making
Joined: Apr 2003
Posts: 16,437
If your projector mount is rated for more weight than it's currently holding, I would try adding weight to deaden the vibrations. You can test out the theory by securing a heavy book or two to the mount with bungie cords or cam straps. You'll get more dampening if you hang the weight beneath the projector, but it might not be feasible.


I can explain it to you but I can't understand it for you.
Re: Any Idea's on How to Stiffen Up a Projector Mount
pmbuko #296979 03/17/10 02:40 AM
Joined: Dec 2008
Posts: 6,928
axiomite
Offline
axiomite
Joined: Dec 2008
Posts: 6,928
 Originally Posted By: pmbuko
You can test out the theory by securing a heavy book or two to the mount with bungie cords or cam straps.

I would suggest Floyd Toole's "Sound Reproduction" to start with.



Half of communication is listening. You can't listen with your mouth.
Re: Any Idea's on How to Stiffen Up a Projector Mount
Adrian #296993 03/17/10 03:44 AM
Joined: Jan 2004
Posts: 13,696
Likes: 1
shareholder in the making
Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,696
Likes: 1
If your projector is attached to the ceiling joists there is not a lot you can do in my opinion. I have a DIY mount using cast iron steel attached across the ceiling floor joists in my basement. I get the occasional shaking from my subs, as well as when the kids are jumping upstairs. Provides a realism to action movies. \:\)


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB SonyUBPX800


Re: Any Idea's on How to Stiffen Up a Projector Mount
SirQuack #298298 03/24/10 08:15 PM
Joined: Dec 2008
Posts: 1,361
connoisseur
Offline
connoisseur
Joined: Dec 2008
Posts: 1,361
I think your best bet is to isolate the mount from the ceiling and bolts. Put neoprene (sp?) between ceiling and any contact points, and put thick soft gaskets or neop on floor side of the anchor bolts.

50/50 chance it gets better. But anchoring it more tightly I thinks is a hard road, unless it is really loose right now. With that much SPL, you won't get all the shake out of the structure, so you have to isolate.


Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire
Re: Any Idea's on How to Stiffen Up a Projector Mount
Zimm #298368 03/25/10 05:30 AM
Joined: Feb 2004
Posts: 1,863
connoisseur
Offline
connoisseur
Joined: Feb 2004
Posts: 1,863
I would say the weight idea also.. I would make a mold of the top of the projector, and get some led, and melt it so that I would have a good fit with some double sided tape.

the bolt idea that Zimm said, will most likely not work due to the bolt going though the stud, and then to the projector, so the bolt will still be a sound or vibration short.

you would need to do something similar to a motor mount, with 2 studs that go into a common rubber mount, but the 2 studs are not physically touching. something like this.

http://www.rubber-group.com/isolationmounts.html

Page 1 of 3 1 2 3

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,437
Posts433,086
Members15,428
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,437
SirQuack 13,696
CV 11,829
MarkSJohnson 11,451
Who's Online Now
1 members (norap), 269 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4