I've read a lot of posts in here and just recently joined. I've noticed that you seem very knowledgable. I have an AVT150H with a custom built 2x12 cab. One of the fans is very niosy (like bad bearings/bushings) for about 10 - 15 seconds after I turn it on cold. I'm having trouble trying to find replacement fans so I don't fry the amp. All I can find at local stores are 12v rated fans. I've looked at the ones in my ame and they are 24v rated. Any suggestions on where to get the replacements?