I've found that pointing a fan at a security DVR to reduce the case
temperature dramatically increases the life of hard drives. Duplicate
what you are doing to cool the power supply with a fan blowing on it.
Since the whole enclosure is aluminum, if you can cool the outside, it
will be cooler inside as well.

Best regards, Bob

On Sat, Apr 9, 2016, at 09:55 AM, V G wrote:
> Hi all,
>=20
> I just bought a very good class A headphone DAC/amp which uses vacuum
> tubes
> (http://www.wooaudio.com/products/wa7fireflies.html). It was an
> investment,
> so I'd like to take care of it and maximize the lifespan of all the
> components (I don't mind replacing tubes though).
>=20
> The unit runs warmer than body temperature when idle, and hot when in
> active continuous use which I normally do. There aren't any vent holes in
> the enclosure, so I'm worried that the heat will significantly reduce the
> life of the capacitors and other components inside. Should I open up the
> unit and drill some holes in the back and bottom to improve passive
> cooling? I would mount a DC computer fan, but I'm worried that the
> switching noise will find its way into the amplification path.
>=20
> The power supply also runs hot, but it has vent holes, and resting it on
> a
> computer case fan *significantly* drops its temperature so I'm not
> worried
> about the PSU anymore.
>=20
> Any suggestions would be much appreciated, thanks!

--=20
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--=20
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