Clovis, welcome back. The thread mentioned does have much irrelevant material, but you might just scan the last 4-5 months for posts only by Ian or Andrew. Easier would be to check the "Blog" page at the top, as Ken mentioned. In March-April there were three discussions by Andrew covering various aspects of the LFR1100s.
Yes, although these appear superficially similar to older designs such as those used by DefTec, as was already pointed out by Tom, there's a significant difference. The older designs sent the same sounds to the front and back drivers, which caused interference when they met and reduced sound quality. The LFR1100s use a separate DSP processing box to modify the frequency and level of the content sent to the back drivers to compensate for these effects, which is said to result in significantly better reproduction.
