 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
203.164.56.167
In Reply to: RC network(zobel) Radio Frequency speaker filter question?(rather long) posted by Keith Lockwood on May 9, 2005 at 12:23:41:
a
Follow Ups:
Unfortunately, ferrite beads of unknown pedigree or sources that are not defined as to their saturation current, frequency range, etc., will tend to be more of a hindrance than a help.When used on power cords, UNLESS they have sufficient current capacity, they will tend to repress dynamics, and generate their own subtle grundge. Even what would be 'properly' sized and rated ferrite beads usually cause nothing but degradation on a speaker cable, unless it has a very unusual geometry.
When used on certain coaxially shielded interconects, and possessing the correct frequency range, they can actually help some, but this is a lot of trial and error, and listening, to find the right ones. Unshielded IC's, forget it, they will not do the sound any good.
So unless you can get some that are known to work well on a shielded IC, and with a lot less probability of success, those that seem to work OK on power cords, it is hardly worth the time, effort and expense, unless you are in a desparate need to fix a severe RFI problem. Then, some of the compromises they entail might be a worthwhile trade-off in order to gain some respite from the RFI. Even then, there will be a lot of experimentation and listening, and a lot of trial and error.
Jon Risch
Ferrite beads are great HF/RF dampers on AC lines i.e. linecord (placed as near to the power tfmr as possible on both primary(s) & secondarys). They are also effective placed on interconnects placed as close to the input of preamp & amp. They are available on the surplus market in clamshell form that are split and can be snapped onto a line. The problem is that there is no telling what frequency range they will damp. The best thing is to buy a range of them and try them on a line to see which is the most effective (your ears will tell you) and buy as many more of that type as you need.Happy Listening !
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
