Hi I bought a NAD T973 recently it was in storage at an audio shop and saw life as a demo model. It works great and sounds great except for the fan noise it is like whirling it is louder then I thought it would be and do to the age of the amp I was wondering what other owners of it thought. If it was low i could forget about it but it is annoying. I was wondering if these fans could be lubricated on the bearing. Also how hard would this amp be to take apart to get to the top of these fans. Please if anyone has some experience could they help?