Gentlemen, I'm putting together my first amp with 2 3-500's. I'm going to use forced air cooling. I have access to lots of fans thru Grainger but am wondering which to choose from or maybe there is another supplier? I'm going to use a seperate supply so room won't be a problem. Larry L. Ravlin AA7LR EX KØAEY & KD7BXR aa7lr at msn.com Extra class @ 20WPM FISTS #12867