I have the older, Ti versions. I did at one time have resistors installed, but removed them after I got an AVR with Audysey.

I never considered myself to have a golden ear Rick but the tonal difference is very distinct to me. I have a couple different calibration BR's. One has a sweep that sorta moves around the room in a fluid motion. If everything is set correctly, the sweep is seamless. It is not seamless in the front. But if you like the pairing, then don't mess with it!