NAP 135s Cooling fans

[thranderson]

I can hear when the cooling fans on my two 135s are 'on'. This raises the following questions.
1 Should these fans be running silent?
2 Does the noise they make indicate that they should be replaced?
3 Is their replacement a DIY job?
Thanks for your responses.

 

[Paul Hindle]

They are ‘virtually’ silent. Which means you can hear them sometimes. Nothing to worry about. I can hear mine but only during these heatwaves we are having.

 

[MJS]

1. Nope, they're just a bit noisy
2. Nope, see 1.
3. Not really, you can easily replace them with something potentially quieter, but the fan control board would need re-calibrating, and that's done under a specific bench load test to maximise the heat dissipated by the amp and power supply board.

 

[david ellwood]

If you’re playing music loud enough to set the fans spinning, you shouldn’t be able to hear them.

yes they make a noise.