Editor: I was upset to learn that Dick Olsher regards our G/3 as a "lowly bass reflex." The "Line Tunnel" principle is something we developed years back as a next-best approximation to the virtues of true transmission lines. It does flatten impedance, giving one peak only, and in addition does contribute an additional source of low frequency information.
Some reviewers have called this a cross between air-suspension and bass reflex; others have called it any number of things. What it should be called is a Line Tunnel", or "Flow Resistance Loading system."—…