[jtwrace]

Has anyone found very quiet micro fans for an equipment project?  I would like to put one under each amp just so it will blow some air across it.  I have some granite platforms that are elevated off the floor and had a cutout (similar to a countertop for a sink) put in it and would like to put some fans under them for the summer months when the house is a little warmer. 

If you know of some that are very quiet, please post away.

[Niteshade]

Look here: http://www.newegg.com/Product/Product.aspx?Item=N82E1683

If you could run this with about 5-8 volts DC, it would move a good deal of air and be nearly silent. Put a little 30W oil in the bearings too.

A regulated DC power supply using a LM317 would drive a couple of these very well. You could control the voltage with this IC too.

[jtwrace]

Look here: http://www.newegg.com/Product/Product.aspx?Item=N82E1683

If you could run this with about 5-8 volts DC, it would move a good deal of air and be nearly silent. Put a little 30W oil in the bearings too.

A regulated DC power supply using a LM317 would drive a couple of these very well. You could control the voltage with this IC too.

link doesn't work.    what is a LM317? 

[Niteshade]

The fan is at www.newegg.com

Here is the model: MASSCOOL FD08025S1M4 80mm Case Fan

It's a 12V computer case fan. When the bearings have a good lube on the, like 30W, it will run very,very quiet with around 5-8v DC applied to it. A LM-317 is a variable voltage regulator 3 pin I.C. Makes an excellent fan controller and requires a heat sink. You could also use something like one of those multi-voltage power cubes to run it.

[Photon46]

I've had good luck with 80mm fans I've bought from www.quietpc.com.  They don't sell the exact model I've bought anymore, but their 80mm Austrian Noctua fan looks like the one I bought. It's rated at 17 db. and has an oil bearing motor. In my PS Audio Power Plant, it made for a significant reduction in noise. They sell other noise reducing items for electronics, useful stuff.

[jeenie67]

I've put resistors in the lines of my Crown amps to slow them down to a breeze. Also I use "Whisper" fans (trade name, absolutely quiet). Research online with computer cooling fan will produce numerous results. All different sizes and voltages are available.

[srb]

I've had good luck with 80mm fans I've bought from www.quietpc.com.  They don't sell the exact model I've bought anymore, but their 80mm Austrian Noctua fan looks like the one I bought.

I used the Noctua fans in my HTPC which sits in my A/V rack.  No fan is silent, but they're pretty quiet.  Also they have a long MTBF.

A larger 120mm fan running at a slower speed to produce the same airflow as an 80mm fan will be a little quieter, so I would go for the 120mm if you can accomodate it.

Steve