I have a Laney RB7 Amp and the fan is quite noisy. I have had it looked at and am told that the level of noise is "quite normal". My question is: can I disconnect the fan altogether? I don't use it to play gigs as I have recently bought a Fender Rumble 200 mostly because it is way lighter - pun intended. I don't play in paid gigs any more. Your thoughts would be greatly appreciated. Paul, from way down South - New Zealand!