I bought the 901 series5 in about 1984. I had an old SAE 501 amp driving them with about 250 watts per speaker max. In my opinion the 901 speakers did not sound better with more power, just went louder and filled the room with loud sound. I anchored them from the ceiling and put them on pedestals. Both configurations gave me similar results. Although a revolution in design for surround sound (I think Bose was attempting to recreate the live concert sound) the speaker had many limitations. Interestingly Dr. Bose really spent much of his earnings on another revolution in car suspension (shock adsorption) in cars. But he did not succeed in getting it adopted into the industry. A shame really because the design was crazy good...
https://www.extremetech.com/extreme/259042-bose-sells-off-revolutionary-electromagnetic-suspension
https://www.extremetech.com/extreme/259042-bose-sells-off-revolutionary-electromagnetic-suspension