I recently bought an amp (Traynor YCV 40). I bought it used, the owner said it was almost two years old. It came roughly two weeks ago and worked great, but now it makes this strange crackling noise, i have a video, but you can't hear it that well, it's a lot louder in real life..here's the link, don't mind the bad playing.

does anyone know what could cause this? Is there any way to fix this?
Fender CP Jazzmaster
Schecter PT Custom w/ Dimarzio crunch lab/liquifire
Marshall JCM2000 DSL+Orange 4x12
Orange Tiny Terror+Mesa Electra Dyne 2x12
Boss TU-2/NS-2/DD-6
Maxon OD808

Quote by ECistheBest
possibly old tubes.

+1 more than likely
My Rig:
Fender American Strat w/ texas specials
Martin DX1
Blueridge Br73
1968 Domino Californian
Stagg bass
2006 Fender hot rod deluxe
Gretsch Electromatic compact amp
among others
check to make sure any screws are loose cause my dads Ampeg Reverberocket had that same kind of rattle. The amp (part with controls on it) was rattleing against the peice that it was screwed to it.