Does the manufacturer sell a fan noise kit that will help? Many projection companies do.
tweaking cooling fans
The fans in my pro amps make too much noise.My thought is to put inline with the 24vdc a potentiometer to reduce voltage and slow the fans down.I have used the amps with the fan disconnected but they get warm to the touch,not hot.I would like a nice breeze across the heatsinks.I picked up a bunch of 3.5k ohm potentiameters.Your thoughts.