Acoustic Profiles was a brand of Audiosphere Research from Canada, and I've owned a couple pairs over the years which have been excellent. The used to be carried by various audio shops, but also by Future Shop. Their peak of popularity was during the 90's, and they were generally reviewed quite well.
I just got another pair of PSL-88.6, and they keep up very well with my Polk Audio RTi A7's which I've been comparing them to this evening. If anybody has a chance to buy these products used for a great deal, definitely take a listen as they are certainly not "white van" stuff ;-)