There is a lot of fans of all of these preamps, and yes, some of these fans are very vocal about their love of them! Does that make them loud? I don't know, but I see some of them typing in all caps - which I think is the equivalent of shouting ; )
For the most part, ARC uses fans in some of their amps, but I don't know of any current or recent model preamps with fans. I have owned two ARC preamps, neither with fans for cooling.
I never owned an ARC pre with fans, but have had both Classic 120's and 150's with extermely noisey fans which I changed out from the Taiwan OEM originals for German Papst fans which run really quite. I've got the top mounted optional extra fans in my current 610T tower amps, and these run really quiet, but don't know who is the OEM.
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