(Electronics|Stereo)filter: What is causing this infuriating noise in my preamp and how do I fix it? Links to sound files and long list of symptoms in extended. [more inside]
posted by strangecargo on Jan 15, 2009 - 6 answers

What is the purpose of this random noise my electronics are making? [more inside]
posted by bondcliff on Jun 4, 2008 - 11 answers

Laptop power supply interfering with PA speakers. [more inside]
posted by The White Hat on May 18, 2006 - 17 answers

Why do my speakers play music when no music is playing? (More inside) [more inside]
posted by bkeaggy on Apr 27, 2004 - 7 answers