altec lansing

does anyone know anything about the altec lansing tower 511 speaker system? they were made in the early 90's.they are large and heavy. they contain two 10 inch woofers, one 61/2 inch mid bass, one 2 inch dome mid, and one 1 inch dome tweeter.they can be single, bi, tri, or quad amped. the cross-overs can be changed at will. any reviews, would be appreciated.