I just bought a new Marshall DSL40CR last week, and when I have been playing on the low watt setting for about 30 mins, the volume drops in and out. I haven't experienced this on the high watt setting...yet. is there a recommended EQ or other setting configuration for the low watt setting to help with the issue of the volume dropping in and out? I have switched out cables, guitars, not using any effects or speaker cabinet either.
Thank you for your comments, we would recommend the amp is looked at by an engineer, and checked over.