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In the Forum: Audio Discussions
In the Thread: Romy The Cat's new Listening Room
Post Subject: How to use basement jacks?Posted by Romy the Cat on: 10/26/2010
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As I told my floor is suspended. It made with something so called architectural wood. I use basement jacks, currently 4 jacks, to support the frame under the floor - under both speakers, the equipment stand and listening chair.  It is not that the floor sags but at very high volume I do pick some minor asynchronous vibrations on the floor. I do not like it as I was wondering if using more jacks would address it.

However, thinking about more jacks I am asking myself if I use the jacks that I have properly. I have absolutely no idea if I extend the jack and lift the floor sufficiently. The jacks are metal and can handle many tones. I am sure that if I want I can bend this floor with those jacks but it is not my objective. I usually setup a jack begin to listen the floor and listen how the floor’s beams react. Then the juts begin to “crack” then I add one turn on the jack and consider that it was it. I am not convinced however that is NOT a right way to go. Perhaps I need to do another ½ inch or more, I do not know and I do not want the floor begin to crack my walls or something like this. There is no way to put a level on the opposite side of the floor beams – they are too large and too rough to accommodate a meaningful level.

Does anybody have broke own house with jack, can you teach me how much is too much?

The Cat

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