Vienna acoustic morzart


I just picked up a pair of Vienna Acoustic Mozart for a relatively low price. Sub $500. I hooked it up to my mac ma6900 but it just don’t sound good. No upper end or it just distorted however the bass is there. Anyone out there have the same setup that could comment or should I just suck it up and pick up a pair of sonus faber Cremona M? Thx
ucdmac122005
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They are. I think I am trying to compare the Mozart with something that is in a different league. 
I had a set and reversed the tweeter connections inside the speaker and viola! The highs were there now! I had read to do this on an audio thread.