I finally got around to putting a fan in my empeg.

I purchased the fan from RadioShack. It has the same dimensions as the one people have talked about here, but is cheaper (not a bearing fan). It is 12v.

It is quite loud at the full 12v, so I threw in an 82ohm resistor to slow it up a bit. Even now, when the unit is on my desk, the fan noise is obvious. Doesn't bother me though.

I attached the fan with double sided tape, in the designed position. It was tough to reassemble the unit, but with care it can be done. If only the mounting holes were a mere .5 cm back.

On the desktop, the unit would normally reach 114F (46C). With the fan, it never rose above 85F (29C). Nice.

The next day, I had the perfect chance to test it, as we drove to Mount hood and back (a good 3 hours in the car).

Previously, the unit would easily attain a temperature of around 142F (61C) within an hour of being on (fyi, it only has a single drive inside).

For the trip, I never saw the temp rise above 122F (50C) -- and the car heater was on the whole time. The fan noise was not noticeable while in the car.

I'd rather see the temp stick around 100F (38C), but oh well. Dropping 20F (11C) off is quite welcome.

Cheers,
rjf&