Hi Roger,
Thanks for your comment - much appreciated

I've done one gig so far with my Bose Compact and the sound was GREAT. The gig was in a nursing home and it was quite a large community room. I positioned it more or less as you suggest and left the KN7000 internal speakers on. The Bose system produces the best sound I have heard from my keyboard and believe me, I've tried a wide variety of other amplification systems and none of them come close!!
I paid a little more for my system - £899 but it's worth every penny......
Anyone else looking for a reasonably priced superb addition to your keyboard (not just the KN7000) - Go For It !!