- Aug 15, 2020
- Southampton, UK
I am not disputing what you say. I was being sarcastic as TL alignment is the company’s USP even though, as you correctly said, it is not a TL, nor an advanced one (ATL). It is simply a vented enclosure with a lossy port.I could insist that I'm young and handsome, too. That wouldn't make it true. Maybe they are a TL, maybe they aren't. I looked into Stereophile magazine:
quote: "Although PMC describes the fact.8's woofers as being loaded with an "Advanced Transmission Line," the solid trace in fig.1 doesn't look significantly different from the impedance of a conventional reflex loading, with a low-frequency saddle at what would be the tuning frequency of the port." and "As with a reflex design, the output of the port is in opposite polarity to that of the woofers, though the length of the line delays the vent output by several milliseconds."
quote: "In a true transmission line, the vent output is in-phase with that of the line-terminated woofer; by contrast, the output of the PMC DB1i's vent is in opposite polarity to that of the woofer, again typical of reflex behavior."
And a page from someone named Kalman Rubinson. I never met him, but he sounds like a bright kid.