Quote:
Josuah wrote:
 You don't necessarily need to introduce a resistor to reduce the fan speed, and in fact that might not be good because you're decreasing the air flow as Bob described. Another solution is to replace the cheap fan with a high quality fan made for quiet computers. You can get the same amount of air blowing through (compare the ratings) but with much less noise. |
I monitor the exhaust air temp coming out of the side vents on the Mackie pro amp (using a scientific instrument -- my fingers
). Normally fairly cool -- but when I am pushing the amp with a longer high bass level session (which is loud), air starts to feel warmer -- so I flip the bypass dropping resistor switch. I looked up quieter fans that have the right voltage and size, so I know of a fan model that is rated a few dBA quieter -- but first I thought I'd try the dropping resistor mod and see how it worked. I'm happy with the results after 18 months of use.