A ams2ek Member Joined Oct 19, 2007 Messages 13 Reaction score 0 Dec 24, 2019 #1 My Mark IV head does not have a reverb tank installed. When I turn the reverb knob it acts almost like a presence control. Can anybody please confirm if this is normal. Thanks
My Mark IV head does not have a reverb tank installed. When I turn the reverb knob it acts almost like a presence control. Can anybody please confirm if this is normal. Thanks
Markedman Well-known member Boogie Supporter Joined Jun 26, 2013 Messages 1,453 Reaction score 19 Location Norfolk, CT Dec 25, 2019 #2 Not normal. It's probably a bad tube.
