On Nov 12, 12:17 am, CJT <abujl...@[EMAIL PROTECTED]
> wrote:
> Scott wrote:
> > I have a Crown Com-Tech 410 power amplifier that starts making strange
> > internal noises and vibrations after it has been on for a while. The
> > sound output itself is unaffected and seems great, but the box itself
> > emits kind of a low "grumbling" sound and you can feel matching
> > vibrations when touching the case. Turning it off and on stops the
> > noise, but not for long.
>
> > Anybody have any guesses about what might be going on?
>
> Noise from a dust-clogged cooling fan once it gets warm.
>
> --
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so? When the box starts up, I can hear the fan whirring away.
Then it gradually throttles back to "off", but that all sounds fine
and seems normal. I checked the intake filter, and it was pretty
clean. Nonetheless, I'll open the box up and make sure that the
actual fan looks OK.
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