I actually happen to have both the LS50 (passive) and the SB Acoustics Ara at home at the moment. The KEF is my personal pair, while the SB Acoustics is on loan at the moment.
My $0.02 worth is that the SB Acoustics is the better of the two to my ears, with better dimensionality and detail overall. The KEF has pinsharp imaging, and a softer top end. Both speakers fall into the warm and smooth category.
The KEF has a tendency to only come alive at higher volumes, while the Ara is happy to chug along at lower volumes. That being said, both speakers are not particularly sensitive and you need quite a lot of power. Let me know if you need more details.
I did speak to the local rep about Beryllium tweeters (they are a drop in replacement for the soft domes used in the Ara). He didn't think that they were a guaranteed improvement as he felt that they were so darn good, that they made the mid / woofer driver pale in comparison. Hmm, kind of reminded me of my ownership experience with the Focal Diablo Utopia when I had them.
Regards
Eric
My $0.02 worth is that the SB Acoustics is the better of the two to my ears, with better dimensionality and detail overall. The KEF has pinsharp imaging, and a softer top end. Both speakers fall into the warm and smooth category.
The KEF has a tendency to only come alive at higher volumes, while the Ara is happy to chug along at lower volumes. That being said, both speakers are not particularly sensitive and you need quite a lot of power. Let me know if you need more details.
I did speak to the local rep about Beryllium tweeters (they are a drop in replacement for the soft domes used in the Ara). He didn't think that they were a guaranteed improvement as he felt that they were so darn good, that they made the mid / woofer driver pale in comparison. Hmm, kind of reminded me of my ownership experience with the Focal Diablo Utopia when I had them.
Regards
Eric