post #16 of 16
Thread Starter 
Originally Posted by flatmap View Post

A microphonic tube, might well pick up the vibration from the case tap or perhaps

even just plugging and unplugging the headphones.  


When the tube is operating normally, I assume that it sounds fine.  True?


If you're getting elevated background noise during 'normal' operation, then I'd

definitely replace.  

No background noise except when I am using IEM's, which must be quite normal.


Thank you very much for the help