Hey guys,

I have in my room a little Pigsnose Hog 40 amplifier, and it sounds lovely for cleans! only problem is if you try to make it loud it cuts in and out between sound and no sound. :S

My thoughts would be that the speaker cone is getting caught on something?

Can anyone help me out here? whats wrong? and what can i do about it?

Maybe your volume potentiometer is broken? IMO it's more probable than problem with speaker cone.
Test your amp on a different speaker, test speaker with a different amp. It's the only way to determine what is wrong.
If it's potentiometer then you'll need to change it.
That sounds possible, though this cutting out can happen with low volume and high guitar pot volume or the other way round.