More about EnABL here:
Listening impressions & techniques
|CSS EL70eN. Click for a bigger picture.|
I have yet to find my personal opinion. I own both treated and un-treated CSS EL70 but I haven't done an A/B comparison. The initial differences though were that the treated one sounded slightly warmer than the un-treated driver did.
And then one should not forget the fact that the treated drivers bought from Planet10-hifi are matched pairs.