Thanks for your advice Bernie and Bruno. My listeners are mostly oldies and not over fussy, but I like to get the best sound I can. My two grandsons will be over from Scotland for Christmas and will be super critical, especially the one doing a Music Degree in London. I have not got a Tonematch and the only E.Q. I have available is in the keyboard, a KN6500. I have it set on the MAKEUP setting with the gain +2.0,-0.5,-1.5,0.0.- with the FC and Q as is. I work in small halls, like Senior Citz and Retirement centres. I have read a lot of advice on the Bose sites and they advise using a mono piano. Any thoughts on this? Cheers Jean Olivia.