stringstrkr Posted August 12, 2015 Share Posted August 12, 2015 I've had the Spider Valve MKii HD 100 head for about 5 years. It has been a work horse with 0 issues except in the past 6 months when adjusting the presence or Master volume Ive been experiencing a popping and volume cut type issue. Im wondering if anyone else has experienced this, and if so, the measures taken to correct them. Quote Link to comment Share on other sites More sharing options...
napynap Posted August 18, 2015 Share Posted August 18, 2015 I experienced a volume cut on my SV MKii 212 combo, which could be considered similar, and found the issue to be bad 12AX7 tubes. I replaced them and resolved the issue. However, there are certainly other things that could be the cause. Quote Link to comment Share on other sites More sharing options...
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