When the black dome tweeters came out, I had just gotten my Sooloos stuff and a used DSP5500 for the center channel. I decided to buy new tweeters all around, as my Dealer in Jacksonville offered to get them for me at his cost.

I scheduled Marc Koval to come and install the tweeters, set up Sooloos and tweak my system. Marc asked why I got new tweeters. I told him I thought they would be somewhat unbalanced in their output, as the speakers were sourced at three different times and were on average 10+ years old. He explained that is what calibration mode is about (see Ian's post above).

In response to your question, I assume (did not do this myself) the activity is accessed from the configuration/setup programs. Someone with more detailed knowledge will probably expand on what I have said here.

James
NC1: 861v8, ID41, 218, 251(to outdoors), DSP8000SEUG, 7200SEC, DSP520 rears, Apple TV, DirecTV, Oppo BD103, QNAP251, Roon
NC2-M7005, Triad Silver Speakers,Acurus Amps

FL1: 861v4, ID40, 218, MS200, DSP8000SEs, DSP7200SEC, DSP5000s, DirecTv, AppleTv, OppoBD103, QNAP469, Roon
FL2: Marantz 7005, 251, M60s,60C,33s, Oppo BDP-93,MS200, Roon