I recently bought the new version of the D2 with the hexagonal enclosure. I would say it's significantly better than my old full range mini voigt aaudio designed from 5 years ago. Paired it with a babyG gainclone, 40 watts is enough to drive these 12 kg each speakers to normal to loud listening levels. I think that the D2 will benefit from a higher wattage amp, guestimate sensitivity is more like 85 to 87 db. I mostly listen to blues, electronic music and a handful of pop.
The D2, as already mentioned are very revealing speakers. My system uses Mp3s as it's main source and the first few days, i cannot tolerate the sound of the mp3's (anyone experienced this?), they sounded dry, uninviting and lifeless ( made me want to buy a DAC). I temporarily switched back to CD's to listen more to the D2s. They sounded warmish, detailed in vocals and very good bass. The 6.5" and mostly bigger drivers really helps in moving air, although the bass produced from a smaller driver 4" or 5" may reach a low HZ already but the sound from a bigger driver is fuller ,warmer and "crisper", its a total level up from smaller driver speakers. Blues, vocals, more clinical electronic music sounds good on these. Rock and metal music (foo fighters, metallica, megadeath,children of bodom) sounds just ok on these, seems a bit lacking (maybe the pairing of the GC isn't optimal, can anyone comment on this?).
The other forumers mentioned the break in time. After around 30 hours, the sound became better, i can now listen to Mp3s on my system. Will see if it improves better after 100 hours. (is this a myth? i think it really sounded better).
This speaker is a fantastic buy, they sound good, very detailed and has deep bass. These will serve me for at least 5 years, 7k purchase price divided by 5 years is only 1k+ plus a year. SULIT. I'd get this over the BS wharfedales and the Polk BS TSIs.