Rerurn to Romy the Cat's Site

Last week I had an audio visitor from far US state and listening Sound in my room and wanting to make a compliment to me he said: “of cause, no one can’t achieve this bass without your solid floor”.  Being asshole as I am I begun to stress with him the theory about the importance to have a solid floor in order to get proper bass. After a few minutes of conversation I recognize that I can’t hold myself and begin to laugh. I told that my listening room has a large basement under itself and the whole floor is very much suspended. The guy looked at me surpassed and asked why he does not feel any vibration on the floor and particularly since I drive the playback VERY loud. I told that I dealt with the problem by dumping the floor. He was very surpassed and asked HOW it was done.

I think the explanation worth to be publicized.

First of all I do not agree with his assessment and I feel that some vibration still detectable on the floor while music plays loud. Still the residual vibration is very minor, at the borderline with being negligible.

What I did was very my view very non-expensive but effecting: detecting the resonance key point and implementing support columns under suspender floor. In Home Depot I got a number of jacks and put them in a number of strategic locations. I have written about it but I did not describe HOW I tune the jacks. The tuning is remarkably simple.

I have 2 jacks under equipment rack, 3 jacks around the lessening chair and two jacks user loudspeakers. After I unsalted them I begin to play music loud (Bach organ concertos) sit in my chair and feel the vibrations. While I was doing it I over telephone directed a friend of my in basement to rise or drop the individual jacks.  As I reach the point of floor stop response I marked the excursion of the jacks and left it to sit like this for 2-3 weeks. Then we fine tune the jacks again.  Doing it for a few time I get the point that floor looks like settled and I just do 1/8 of the jack turn each 2 month – the floor feel like hold stable.  Very easy and very effective.

The only thing was that I was not able to set the proper floor damping under my chair and I was forced to use 25 feet long 8x8 beam across the room. Initially I used rubber pad between the jacks and the floor but then I was forced to get rid of any rubber and use juts 3x4 pieces of wood. So it is not as much damping but rather an additional firmness….

Rerurn to Romy the Cat's Site