I only wrote on the subject header, so there was no text to read in the "message body"
Any way below is a quote from a review in Stereophile, they mention that the woofer drivers are from "Acoustic Technology International (ATI) 6.5" midrange/bass driver".
http://stereophile.com/floorloudspeakers/378/If they use the drivers from Hi Vi then they must have changed??
The Forest
The Forest is a two-way, floorstanding tower loudspeaker with two drive-units—a 1" SEAS aluminum-dome tweeter and, below that, an Acoustic Technology International (ATI) 6.5" midrange/bass driver—mounted in a narrow, 3'-tall cabinet less than a foot wide and a foot deep. Such a narrow profile helps optimize diffraction effects, and allows the drivers to more closely approximate a point source than might occur with a wide-baffle design. Bruzzese claims that small, rigid enclosures are less apt to store energy and radiate it later, leading to interference and blurring. On the other hand, small minimonitor enclosures lack the capacity for playing very deep bass, and can be limited in dynamic headroom.