keeping amps cool?

"Actually you're better off using the fan to draw heat from the amp instead of blowing air directly on it."

yes, I use a PQ exhaust fan...
http://www.hometheatercooling.com/purchase.html

Drawing the heat is easy. anyone else concur it's better than blowing filtered ionized air -gently--at the fins?
I believe in efficiency and know blowing is more efficient than drawing away.

Buy a Class D amp if you're concerned with efficiency.

In the past I had an amp stand constructed that incorporated 2 whisper fans that were used to draw the heat away from the amp thereby “enhancing” the amp’s nature convection cooling properties.

The fan’s had a variable power supply to control fan speed that could not be heard from the listening position.

Push me pull me, what's the diff? I use an O 2 Cool outboard fan directed at the tubes of my Bada Class A headphone amp that normally runs quite warm. The tubes stay cool as a cucumber. O 2 Cool fans run very quietly, available on Amazon.