I listened the MA7000 with FOCAL JMLAB 1007/8BE last year in accident (because I was listening MBL 7008 with JMLAB). They were good match and it maybe better MBL with JMLAB in my opinion because its very balance between all frequencies (high,mid and low)and so it could well play and match most ppl. for almost all kind of music.
Therefore I think 6600 is good match with FOCAL JMLAB 1007/8BE as well.
Just 2 cents