I have G1's driven via a Devialet D premier amp , my room is around 26ft , by 19ft by 8ft.
It is currently being re-built around these speakers and is fully treated etc
Look at this thread ..
http://www.avforums.co.za/index.php/topic,41561.0.html
At any rate, I have heard the 1.5's, b1's , k1's , g3, g2 and g1's in various rooms and systems and you truly cannot compare the Vivid range to any other speaker.. they do not wow you immediately , they suck you into the performance. All my pals that have got vivids (quite a few in South Africa) have upgraded , ONLY within the vivid range...
It is an amazing experience with my G1's , my bass is not as good as it can be but with my bass traps and Dirac..I should get it 100% right
The system I came from was meridian DSP6000's and a set of SVS sb13 ultra subs. This was a bass monster system and the G1's easily equal or outperform it in the low bass...
In my room , the G1's are still delivering at 16hz - you can feel it .. 20hz and above , its full blast...
The really impressive thing re the G1's is the ability to play loud and clean , in fact I would say that if you are not going to play at lifelike or realistic levels , buy something else. the sound is so clean that you tend to wind these up more and more , go out the room for a cuppa and come back and you are struck by just HOW loud you were playing. I have had my G1's up to a level where the amp was running out of steam a bit , but you can never listen at those levels anyway.
But the most impressive thing is the all immersive sound that takes you to the performance or the performance comes to you.
You can follow every thread in the recording , the intent of the artist , the very fingering of the instrument down to a micro detail level , but the end result is all those threads coming together in sheer music.
There is no analytical spotlighting in all this - there is just music.
Even in my unfinished room , the effect is there. I had a pal of mine (with 1.5's , he is waiting for his G3's) in tears after he played a Van morrison song..never seen anyone cry to music...
Another friend of mine , who is into Keith Jarret , was in a trance as his "go to " reference track was played and afterwards was gushing and thanking me profusely for the opportunity of listening to what he felt was the best rendition.
Wonderful speakers.. worth every cent and more..I have no idea where I can go after these speakers , as an upgrade.. maybe there is a G0 in the works ?