Wayne Parham Messages: 18835 Registered: January 2001
Illuminati (33rd Degree)
No differences in measurements or subjectively (at least to my ears) between various wood thicknesses, provided the braces are installed. You should have an internal cross-brace one-third the way up from the bottom and another one-third the way down from the top, just under the woofer. Those are what really prevent the panels from vibrating. Don't forget to put insulation on the braces too, spanning the cross-section of the cabinet.