Can I place outdoor screen over air vents on top of my amplifier vs. dust/hair entering?

Yes but some dust might still get through. I would go with duct tape.

I would give it a try, but get a feel for the operating temp before the screen and after to see what the actual difference would be. Enjoy the music

Bad idea it should be as it comes from the co.

Lots of models, these little fans are great!,
when I play for extended periods, these lil babies keep everything nice and cool.

https://www.amazon.com/AC-Infinity-Top-Exhaust-Receivers-Components/dp/B01LW1Q4X9/ref=pd_sbs_2?pd_rd...

Thanks! I don’t believe the screen has increased the operating temperature of my Gamut D200i.
Just thought it might help as we do get a good amount of dust, etc circulating here in FL, despite religious AC filter changes every 2 months. I realize some dust gets through but some circulating hairs etc do not. I like the fan idea as well.  

Everything I have stays covered with off white silk tablecloths. I live on the delta, between three types of soil. Adobe, sand, and pete. A lot of farming and the santa anna winds. I uncover the valve amps and dust them off most mornings, fire them up and leave everything else covered, except the front of the Preamps. 6-7 years now.

I remove the tops and clean them once a year, They stay very clean NOW. They haven’t even got close to hot, warm if I really push them in the cooler months. HOT summer months the same thing I just do an amp swap. I use class Ds. I swap out at Christmas.. LOL the silk is a beautiful crimson during the seasons..The silk is a natural shed for hair and dust.. plastic all that stuff screens it will collect hair and dust eventually.. Smooth polished surfaces (silk) don’t hold dust or static discharge either.. A toss in the dryer for 1-2 min.. A wash every 3 months in a 5 gallon bucket with woolite, and a 3 bucket rince..20 year per cloth. 40-50.00 per cloth.

Dogs, Bunnies, Wife, kids, goats, chickens..

If we concert, I vacuum up the house real good, have a few people over and uncover my gear.. I keep everything covered now..
To hard to clean, NOW.. LOL

Regards

When not in use,
I cover my amps with dust covers from Stan at radio dust covers. He makes a quality product and can sew in the manufacturers logo if wanted.

https://radiodustcovers.com/

I would think that the material that is used for stopping weeds in the landscape would work. It allows water and air to pass thru and is lightweight.  A small roll should do the trick. Very cost efficient for your experiment. 

All good suggestions. I’m thinking also 100 micron stainless steel fine mesh?

@millercarbon you crack me up. 

I am not trying to be funny, but why not use something that will actually stop dust. Instead of an outdoor screen, why not use something like pantyhose. Seriously, it allows air flow but will trap dust better. I used my wife's pantyhose as a second layer when I had to re-insulate our attic. That being said, if you use something that is actually efficient, you will have to be diligent about cleaning them or it may lead to overheating and a voided warranty.