yea i just got a 120 watt peavey half stack (tube) and it has a really awesome sound but the only thing is that every so often it fades out to a really quiet sound, its kinda old but i was wondering if theres anyway of fixing this like get a new head/tubes or somthing else....thanks for the help
Take it in to a repair shop...it prolly needs either new tubes, new capacitors, or both.