Marshall Amp Forum - View Single Post

Colbebi · 10-26-2008, 10:03 AM

I have two questions for this group:
1. When switching channels (both with footswitch and on the front panel) of my AVT50, the volume spikes very high for a brief moment, then returns to normal. It is quite alarming and can wake the rest of the house when I play late at night. Does anyone have ideas what might be causing this and how I might fix it?
2. Can someone tell me how to bias or adjust the gain of the preamp tube?

Thank you!

10-26-2008, 10:03 AM	#47 (permalink)
Colbebi Junior Member Join Date: Oct 2008 Posts: 1	Re: Marshall AVT50 Mods I have two questions for this group: 1. When switching channels (both with footswitch and on the front panel) of my AVT50, the volume spikes very high for a brief moment, then returns to normal. It is quite alarming and can wake the rest of the house when I play late at night. Does anyone have ideas what might be causing this and how I might fix it? 2. Can someone tell me how to bias or adjust the gain of the preamp tube? Thank you!