I was jamming with my band the other day and my orange amp started cutting in and out. It was the same sound as if you had a bad cable but I checked the cables and changed guitars and it still kept cutting in and out. What's could be making it do this? The amp was a floor model and ive only had it for two months. If its the tubes would it be the pre amp or power tubes?
Is that amp a multi channel amp, and if so, does it do it on multiple channels?
It does do it on both channels
Does it have an effects loop? If so plug directly into the return and see if it still does it. If not, then the issue is prior to your power section. IE, preamp tube, effects send jack, or input jack, etc.
It doesn't have an effects loop