Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
It almost doesn't matter if it's on the top or the bottom. Most of my speakers have it on the bottom, but then again, most have the port nearer the bottom. This model has the port nearer the top. So the insulation actually works a litlle better on the top than the bottom, but the difference is marginal.