NO echo on the vocals......? Are Bose trying to change the way pop music has been recorded and performed for the last 50 years? Perhaps they would prefer if you don't use any chorus on your guitar?! Or any overdrive?

I understand that the Bose system is a very different way of doing public address, but trying to dictate how you should sound is a bit extreme! Echo on vocals is more (much more!) than just room compensation - or should be! - it is a spacious effect used widely by almost every recorded singer out there..... Try to imagine Led Zeppelin without the vocal echoes, or Coldplay, or Peter Gabriel.....

I agree that echo shouldn't be used as room simulation, but it's use as a vocal effect is essential to almost any style......