keeping amps cool?

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

"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.