I have a 5 year old Rectoverb (Series 2) Combo that has the original preamp tubes. I've changed the power amp tubes twice so far. Should I change the preamp tubes? The amp does not get much use at all. I would say it has maybe 300 hours total play time on it.
Or should I just wait to replace them until I get some of the failure signs (from Mesa website):
Preamp Tubes:
• Hissing, 'shooshing'.
• Sputtering, 'grumbling'.
• Microphonic squealing (feedback type sound).
• Loss in signal in one or more modes of the amp (channel, reverb, fx-loop).
Or should I just wait to replace them until I get some of the failure signs (from Mesa website):
Preamp Tubes:
• Hissing, 'shooshing'.
• Sputtering, 'grumbling'.
• Microphonic squealing (feedback type sound).
• Loss in signal in one or more modes of the amp (channel, reverb, fx-loop).