As he promised, Guttenberg reviews the Eminent Technology LFT-8c.

While Guttenberg's reviews of 8b and 8c are both positive, I feel he did not review the  8c quite as it was intended. He dismissed the DSP function of the speaker, saying it did not sound as good. However, the DSP is an integral part of the 8c. The entire signal chain goes through a A-D and D-A conversion, so that one is able to adjust the low pass level as well as time align the high pass signal. The speaker is preset with a -14.5db on the bass and a 0.6ms delay between the panel and the woofer. Both these functions allow the speakers to integrate better with the listening room, provide a much more coherent soundstage with better image depth and width, and a better integrated bass response. 

I know there are those who say they can hear a DSP in the signal chain and dislike it. Just like there are those who claim they can hear a step-up transformer in the vinyl signal chain and dislike it. But with the 8c, it is through the 'digitization' of the signal chain that certain sonic defects could be remedied. I just wished Steve could have made a little more effort in discussing the 8c with and without DSP. 

If it were an issue of more and better bass, than @bdp24 's comment on the Rythmik / GR Research open baffle sub-woofer must be a great solution. But even the Sanders system uses an integrated DSP solution to the design. I just wish the DSP design methodology could be discussed more insightfully. I asked Bruce about the use of DSP in an email. And he claimed that DSP technology has advanced so much  that he can use it to do things that were just impossible a decade before. And given the advancement, he felt that DSP is the lesser of two evils, the other being a passive  crossover design.  

There is another positive review of the LFT-8c’s by Jules Coleman on the March issue of Enjoy the Music.com. Coleman’ picked up the review speakers directly from Guttenberg’s loft! 
it’s a long review primarily on his listening impressions and less on the technical aspects, e.g. DSP settings..etc.

I , too, have re-read the review and there are some observations by the reviewer that would merit further comment.
I have a room that is as deep as the reviewer at 30 ft, however, considerably narrower at 10 ft wide. The speakers are 7 1/2 ft from front wall ( not quite at 1/3 ) and 7 ft apart ( measured from center of panels ). I have found the speakers energize my room very evenly, just as the reviewer’s comment. I have an exercise machine at the back of the room, and I find that listening from that position is also enjoyable. Yes, I would be off from the horizontal axis but still not bad. 
My seating positions have varied from 10 ft, 12ft, and 15ft from face of speakers. In the first two positions, I do hear a soundstage that emanates from the back of the speakers. On good recordings, the soundstage stretches well beyond the sides of the speakers. However, with the new found 15 ft distance, I am experiencing a soundstage that can be best described as immersive, like listening through head phones. The soundstage is stable and floats from the plane of the speakers. I assume this is where  room nodes are canceled. 
The placement of the ribbon tweeters to the inside was, I thought, acceptable wisdoms for the LFT-8’s. I think even Bruce recommends this arrangement, so it is quite a surprise to find the reviewer listened throughout with the tweeters to the outside. This is prompting me to experiment over the weekend.
The 8c is a significant evolution from the earlier models.I lived with 8b’s and upgraded. I am sure it is probably similar to lovers of the 8b upgrading to separate dipoles woofers. 

There are a few equipment in my system that I have no inclination change, the Verdier TT, Trans-Fi Terminator tonearm, and the 8c’s. It’s hard to explain why this is. I know spending more money will get me more. But these three are keepers.

 

Oh, and @bdp24 turned me on to the ET’s several years ago. He had championed the speakers for many years. And I have followed him for a while now, so to have someone insinuate that there is a financial arrangement between him and Bruce is quite laughable. This perhaps go without saying, but there I have said it.

@ricevs Could you elaborate on upgrading parts for the lft-8? You must have posted details elsewhere, I just felt at the time that it was beyond my ability to DIY. But I may indeed look into swapping upgraded parts. Thanks!