|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Nooby Q's Isolation/coupling, what's the strategy? posted by Chris_F on March 7, 2005 at 13:10:17:
Excellent advice below. The best way to approach this is to visualize the basic ways vibration can get to your equipment.Like you, I have a plywood floor, but mine is over pier-and-beam instead of joists. In either case, the floor has a fundamental motion up-and-down like a drum-head. However, unless your rack is in the absolute center of the floor, the part it rests upon moves at an angle and not strictly vertically. Your rack or stands translate this motion into both vertical and horizontal motion at the equipment.
It is hideously expensive to effectively decouple vertical motion of typical audio equipment. Compliant feet will only change the overall resonant spectrum of the components on typical racks, and usually make things worse instead of better. Fortunately for us, most audio equipment is less sensitive to vertical motion.
Horizontal motion can be easily decoupled with the roller-ball type devices. CD players, in particular, seem to benefit from this kind of suspension (IME, Wadia 861 works better than on its stock cone feet). My power amps also benefitted from placing them on roller-ball devices.
Another consideration is mechanical damping of the entire support apparatus. Rack framework and shelves should not have vibration modes that enhance audible tones. Shelves are particularly difficult to dampen effectively, and I gave up on mine. I replaced them with U-channel aluminum struts, which are damped with automotive sheet metal damping materials.
DIY can take you a long way, but nothing beats a totally-engineered solution such as one from Bright Star. You may want to play around with DIY to see what kind of benefits you can expect, but you will have to become a mechanical engineer of high order to do better than Barry Kohan.
Good luck!
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Visualize, and damp. - Al Sekela 09:47:54 03/08/05 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
