Will it work, yes, is it ideal, not really. It has nothing to do with crossover or receiver settings. It has to do with not having matching tweeters/woofers. When the speakers are not timber matched and using the same drivers, picky people will notice the difference. Yes, with the receiver you will adjust the dB levels of each speaker to be at the same SPL from the listening position, but this will not fix the differant characteristics of the different driver brands.
The best scenario is when your left/center/right speakers are brand matched. In most situations, it will sound find and you may not care. Some day maybe you can upgrade to different mains. In the meantime enjoy.
You would be better with Qs4's or Qs8's for surrounds, versus bookshelf speakers also..
