Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
That's true. The idea is that we don't want turbulence to generate a sound of its own, and we also don't want a restriction that acts as a resistance. Airspeed is a function of displacement and frequency, is maximum at fb and falls off above that. So woofers with large cones or long-throw suspensions need speakers with larger ports.