I have not noticed the "mid-range" issue. I have used EQ settings we got from Michael Vonchen some years back while in the UK on a visit. If you use the PSRTutorial I believe they have been listed on there. Actually, there are EQ settings from several users there that you can start with. These also include the compressor settings.

One of the main features of the Bose speakers is the sound dispersion. People in the back of the room here the same thing as those in front. I nave never had a time when people in back could not hear or that I had to turn the vol up so loud the folks in front were uncomfortable.

I generally set my Speaker vol at about 11 O'Clock and my keyboard vol is between 10 O'clock and Noon depending on the room size and number of people. Has worked great for me so far.

Deane