How to isolate a refrigerator?

at lowes they have some rubber blocks that people put under washing machines to keep them from walking across the room due to vibration. they are about 30 bucks for 4. at the aircondtioning contractor supply they have the cork and rubber pads in sheets. maybe these would accomplish something. or just put the volume knob up to high[er].. i have a similar problem with room air conditioners and fans. i love to listen with no noise from anything but the stereo. good luck

Turn off the fridge when you listen to the rig, or just dump the fridge and go with the rig. LOL

Here's what I do.
I have my fridge plugged into a light timer (Home Depot)with a on/off switch. When I do critical listening I hit the switch. So for about an hour no fridge. When turned on it only losses 2-3 degrees. At 2 hrs it losses 5-7 degrees. Which is not alot.
Just remember to turn it back on.

Have you tried Silent Feet?

http://www.vibrationsolution.com/index.php

Depending on the age of the fridge, you may have some compressor mounts that need replaced and that could reduced the transmission of sound. Also try foam insulation in the ceiling below the fridge if accessable.
If not accessable try drilling a hole in the floor in the middle of the fridge footprint area and blow in insulation either foam or dry type. That patch for the hold won't be visible unless the fridge is out.