Can you lower fan RMP with ULN adaptor on Noctua industrial line of fans?

[madlarry]

I've seen a lot of information on these fans being louder than the consumer line. However I am assuming this is due to the higher RPM. Could you put a LNA or ULNA on a NF-A14 industrial PPC-2000 IP67 PWM to lower the RPMs and make it quieter? Could you then use a case that has a fan controller to further adjust this? Or am I thinking about this all wrong and you cannot adjust it below the 2000RMP?

 

[Bearmann]

Yes you could lower the RPM with one of those adapters, but my understanding is that these fans a louder even at the same RPM. They also come with fewer accessories (like those adapters). I would choose one of the non-industrial Noctua fans.