Adding more speakers doesn't double the quality, but it does improve the quality.
What is the Bose tower anyway but a bunch of tiny speakers, so the premise is that a bunch of tiny speakers improve quality and are superior to two pa speakers.
Anyway, I thought that the Bose Compact is overrated. I'm sure two of them would sound fantastic, but then, for my purposes, you're talking about serious money and serious setup time. For those who have the $$ and time, it might be a good choice.
Also, I think that a speaker like the FBT, that in critical tests was rated the very best 10" speaker made, paired with a Logitech subwoofer would probably sound just as good as two Bose compacts and one Bose subwoofer. Do the people who use two compacts pair it with two subwoofers?
Beakybird