Hi folks!! Wonna make myself a nice cabinet!! Now I have some nice piece of 18mm plywood (no idea what kind of wood) that I can use... But I see that all quality cabinets are made of birch plywood. What is the reason, will it make a huge difference in sound or is it maybe because it is lighter? I want to make a GOOD sounding cabinet, so I wonder if I better buy some birch plywood or can I just the plywood I have at home? Thanks!