Best material for an isolation platform?


I have an extra set of IsoAcoustics Gaia 2 isolation feet sitting around...I'm going build a platform for my integrated amp or transport. I have an oak shelf that would fit well 18x20x1.75. I could just as easily use MDF. Does the oak have any sonic drawbacks?
 Any thoughts?
larseand
@tubeglow helped me set up a new system last year, including a beautiful Starr sound single shelf rack and audio points. With direction, I was easily able to place my amp And CD player. Thoughtfully designed, this single shelf rack has significantly decreased noise and interference in my system. It’s not only audible--The difference was jaw-dropping, even with my elementary gear! Bob is an absolute sweetheart with a heart of gold. ❤️ Wish he could of known you. 🌹 Check it out on YouTube: https://youtu.be/1y1Vi8wH07I