Any advice on replacing fan for HD 192?

[RuudJan]

I have 2 HD 192's.
The fan's make to much noise and I understand that many people suffer from this problem. I've tried to modify with felt but to no avail.
Does anybody know which type of quiet fan I can buy to replace the original?

Cheers, Ruud Jan

[Worship Maestro]

I am new to this forum, but have used MOTU audio interfaces for many, many years. I have been very pleased with them, which is why I bought an HD192 about a year ago. The fan was noisy from the beginning, but after a year seems to be getting even worse. It's a drag to purchase their top end piece and have it have such an issue. You buy the best stuff for top end work, but who can do good work with the whine.

Sorry don't have a solution, but I thought I just got a bad piece. Guess not......