The Infinity Kappa 8's were commonly referred to as "amp killers," although not quite to the same extent as the even more notorious Kappa 9's.
If you don't mind looking at a Julian Hirsch review, on the second of the pages linked to below see the lower part of the middle column, and the top of the third column, for a description of its outlandish impedance characteristics:
http://www.infinity-classics.de/infinity/models/Kappa-series-1987/Kappa-8-8A/Kappa_8_review_01.jpg
http://www.infinity-classics.de/infinity/models/Kappa-series-1987/Kappa-8-8A/Kappa_8_review_02.jpg
Regards,
-- Al
If you don't mind looking at a Julian Hirsch review, on the second of the pages linked to below see the lower part of the middle column, and the top of the third column, for a description of its outlandish impedance characteristics:
http://www.infinity-classics.de/infinity/models/Kappa-series-1987/Kappa-8-8A/Kappa_8_review_01.jpg
http://www.infinity-classics.de/infinity/models/Kappa-series-1987/Kappa-8-8A/Kappa_8_review_02.jpg
Regards,
-- Al