|
Title: 50 Plexi from 2013 odd noises Post by: Jokermark on August 01, 2021, 03:37:01 PM I found this old post but don't see a response.
Mine is doing basically the same thing, already tried new tubes but still not right.... Any help would be great. Posts: 5 View Profile Unwanted distortion on Marshall Plexi « on: January 19, 2009, 02:13:21 PM » Hello A few weeks back I noticed that My Super Plexi was begginning to emit strange distortion on lower notes, and chords. The sounds spewing forth are sort of a "sub-octave ring modulation" type sound, if that makes any sense. They do NOT occur on higher pitched, single note playing. I realize that this is a symptom of worn out power tubes, so I purchased some new ones, biased using the video instruction off of the Eurotube/JJ website, and unfortunately, am still having the same problems occur. As a newb, where should I begin looking for problems inside me' amp. Thanks |