Dedicated home theater

[Apple Of Sodom]

I have a home theater in my basement. The room is about 13x17 with no windows. I have an SVS cylinder subwoofer. I love bass but have the problem that it shakes my ceiling mounted projector at high volumes. Anyone have a solution for this?

Quck edit: it isn't as if the bass makes the movie unwatchable, but I do notice a slight tremor. The more irritating thing is that it can cause my projector to shift just slightly on the wall mount, causing the image to be off of the scren by an inch or two if played during extended times, such as watching NIN on Blu-Ray at full volume.

 

[iRONic]

Start reading...

The bass trap links/section is what you're needing.

 

[Apple Of Sodom]

I'm looking into wall treatments/bass traps right now, actually. Do you think a trap or two close to my projector would help?

I've seen anti-vibration pads to set your speakers on... my projector is ceiling mounted. Do you know of any dampening system for ceiling mounted projectors?

 

[ericlp]

Hmmm, what type of ceiling mount do you have? Try mounting it on a different joist ... It seems that the vibration is actually going up through the wall / studs and vibrating the floor joists above in the basement. You do know that bass is omnidirectional. Try moving the sub around. Or if it's open beam ceiling, or easy access to open op the ceiling try adding a shit load of 2/6's to stiffen up the joists. Add insulation to the walls? Do you have concrete floors?

If you could take a picture of the mounted projector... You may have to actually make a beefy bracket for it to hang on. I could be the mount it self...

 

[YOyoYOhowsDAjello]

I thinking more along the lines that ericlp is thinking.

I'm not sure if bass traps would make much of a difference in this case. I've tended to shelf mount my projectors though. I have added about 50 pounds of weights to my stands though to keep them from vibrating / easily moving out of alignment. I haven't had an issue with the projector visibly vibrating though, despite having a couple SVS cylinders in similar sized rooms. I don't tend to go up to reference though... more like 15dB below or so.

A combination of getting a beefier mount set up and then possibly trying to isolate it from vibrations is probably a more direct way of attacking the issue than bass traps.

This might be a good area to check out for additional options.
http://www.avsforum.com/avs-vb/forumdisplay.php?f=3/

 

[Apple Of Sodom]

I do have concrete floors with carpet.

The projector is a Sanyo Z4 (yes, I'll be upgrading soon as it is going on 3 years old) with a $200 ceiling mount... it is decent but I wouldn't exactly classify it is incredibly sturdy. It is mounted to a joist in the center back of the room.

I was thinking with my next projector that I would go with a wall mount solution near the ceiling and then use an anti-vibration pad under it. I believe I'll upgrade to a Panasoinc AE4000. I'm thinking a solid, heavy wood shelf with sound dampening material et al would cut down on the vibrations... what do you think?

YoYo, what type of shelf do you use or did you build your own?

Sonipad Vibration Isolation Platform

 

[Apple Of Sodom]

Haha... I just found something for ceiling mounts... what do you think?

Link here

 

[YOyoYOhowsDAjello]

I haven't done much experimenting, but I do think that your solid shelf mount seems like it would vibrate less than your current ceiling mount based on your description.

My shelf is a super crappy metal stand donated by my father in a last minute "oh yeah, I need a projector shelf" realization from several years ago.
It seemed to fit right in with the first environment
https://mywebspace.wisc.edu/sp...Room%202/Projector.JPG
(Complete with pad of paper carefully placed to get my old Infocus 4805 positioned correctly. (Lens shift is one of the greatest things ever for shelf mount folks).
https://mywebspace.wisc.edu/sp...m%202/Whole%20Room.JPG

Luckily it still has a crappy futon to keep it company, but it's not exactly looking great.
http://pics.bbzzdd.com/users/Y...llo/10-18-2009-RRL.JPG
(I have a piece of cloth draped over it to attempt to hide the massive hideousness including rusty shelves). I have several 5 and 10 pound weights on it along with a cheap little receiver.

The weights were mainly an addition for when I had it set up right in a high traffic area
https://mywebspace.wisc.edu/sp...7s%20Room/Back_new.JPG
(Now that I look at that, I don't even know how much that big weight was, but I don't use that one anymore).

 

[YOyoYOhowsDAjello]

Originally posted by: Apple Of Sodom
Haha... I just found something for ceiling mounts... what do you think?

Link here

I tried looking around for reviews, but didn't see any.

I found a few topics on projector mount vibration in general though that might help:
http://www.avsforum.com/avs-vb/showthread.php?t=917925
http://www.avsforum.com/avs-vb/showthread.php?t=992285
http://www.avsforum.com/avs-vb/showthread.php?t=1022873
http://www.avsforum.com/avs-vb/showthread.php?t=1041479


(I only skimmed them to see if they were on topic, not for how good the content is)

 

[sivart]

The easiest way would be to turn down the bass. Stick with me, I too like a lot of bass. However, I found out what I really liked was the 'feel' of the bass. While my projector wasn't vibrating, I was getting a lot from the walls.

So, I turned down the subwoofer and added a couple of these with an extra amp to get the same feel while watching movies.
http://www.crowsontech.com/go/...US/DesktopDefault.aspx

Now I seldom hear a wall rattle and still get the feel that I'm on the airplane as it is crashing.

Sure, the methods mentioned above will work, but they're no fun

Theater Pics --> http://www.flickr.com/photos/2...ets/72157606910032506/