|
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: Plinth Engineering ? posted by Fred J on November 13, 2004 at 11:54:20:
Any resonance on the plinth will be communicated directly to anything connected to the plinth. Such transmission may be reduced (but never eliminated) by various methods.You have noticed that some manufacturers put the motor in a separate pod from the plinth. There is a bloody good reason as most AC motors vibrate so much it is amazing. Even good DC motors are not vibration free, but it is generally less; much less.
In my custom rigs I also mount the tonearm on a separate support. That allows one to create a constraint layer on the surface of the table plinth, thereby releasing some vibration into the air, without adversely affecting the tonearm and finding its way to your speakers.
In addition to these I used many other mechanisms to damp, focus and drain vibration away from the stylus/vinyl nexus as well as to isolate the table from external vibration (they are not the same at all).
Alternating layers of various materials may be tried. MDF and plywood is inexpensive but the MDF does not absorb much. Hardwood plywood sandwiching oriented strand board worked better for me. I have since moved to alternating but damped metals.
Finally, Redpoint maintain that mechanical connection works better than any visco-elastic adhesive. I personally think it varies depending on your goals, but I used mechanical connections myself after much experimentation.
You should get yourself a digital stethescope with frequency analyser to determine the resonances.
Properly done, your setup will exhibit no "noise" including descernable rumble when hooked to a frequency analyzer. And after initial contact, or between cuts, it will be as silent as the grave!
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Plinth Engineering ? - Auricle 04:34:24 11/14/04 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
