When ever i play i get this loud cracking noise sometimes, it seems to be completely random,its a brand new amp and im suspecting the input jack on my guitar cause i put it on myself, and i didnt do a very good job lol.
What kind of amp? Have you tried different cables and a different guitar?
Its a crate flexwave 65 and havent tried other cable or guitar cause i dont have either one handy, but it doesnt make the noise if theres nothing plugged into the amp.
Can you take pics of your soldering job? Try to borrow a friends cable and guitar to figure whats wrong with your set up.
As for the soldering lets just say i would be deeply ashamed to post a picture its just that bad.
That may well be the problem then, maybe have a pro re do it, it shouldn't be very expensive and he probably wouldn't even need you to leave it.
Thats what im gonna do i think, i'll bring everything to the store and get them to take a look.