PMC is a real success story. For more than 20 years, they are the makers of some of the world's best loudspeakers, collecting awards as they go. They are one of the few companys that have received an Emmy for for their contribution to recording excellence.
Their speakers are using the ATL™ (Advanced Transmission Line) technology: it places the bass driver near one end of a long tunnel (the Advanced Transmission Line). This tunnel is heavily damped with acoustic material specified carefully to absorb the upper bass and higher frequencies radiating from the rear of the bass driver. The lowest frequencies are allowed to pass down the line and emerge from the large vent in the same polarity as the driver’s frontal radiation, the vent acting essentially as a second bass driver.
The Fact series includes 3 speakers: fact.3, fact.8 and fact.12. All three are using the ATL™ technology.
What Hi-Fi have tested the PMC fact 8 and their verdict is: "An experiment from PMC, but a successful one: these are highly desirable in every way.". "Their combination of sonic and aesthetic prowess is hard to resist: if you want better sound, be prepared to spend a lot more, or put up with significantly less style.".