The BA SubSat 6 and 7 were a challenge because BA actually cared about maintaining a smooth, continuous FR from the bass module to the satellites, without having the 'acoustic hole' at 140-200 Hz and without having the bass module go up too high in frequency to make it too localizable. The SS6 and SS7 sats were 4" 2-way designs that responded down cleanly to 140 Hz and they sounded great. The 6 used dual 6.5" woofers and the 7 used dual 7" woofers. It could really woof! They didn't sell at Bose-like levels, but were very successful for BA and were probably the best-engineered 3-piece systems around in the early '90's. I know they absolutely blew away the Cambridge Soundworks systems for FR smoothness, bass extension and power-handling. Blew them away. The AM-5 was not real 'hi fi' compared to them.
So the AM-5 was the worst of the three and the best seller by far. This just shows the strong imbalance between marketing/advertising vs. product quality. (something to think about as we enter the Presidential Campaign).
At Snell we tried to stay away from the loudest theater demos and play HT selections with more of a music focus. My favorites were Kundun, James Tailor Live at the Beacon, Black and White Nights (Roy Orbison), Sessions on West 54th St. and a few others.