Dear @mijostyn : " channel balance as a gauge a 0.3 dB change will make a noticeable shift in the center image easily noticed by anyone. "
You are totally rigth and it does not need to be 0.3db but even 0.1db is noted.
My room/system image is dead centered and sometimes ( for several different reasons. ) that " dead centered " shift an almost imperceptible to one side and that tell me that something is wrong down my system other that the LP recording that sometimes image is tiny shifted .
Then that " shift " help me to make a check up to fix it and always with success due that I know very well my system links and nok where looking for.
@noromance , tracking issues not only happens at macroscopic level where you listen to it but at microscopic levels too and cantilever-less cartridge designs have that microscopic issue at higher levels even that you are not aware of it and that higher tracking micro issue modulates/colored what we are listening. You can read here about:
http://pspatialaudio.com/analogy.htm
Now, I owned at least two cantilever-less Ikeda cartridges and yes some characteristics of the reproduction sound is just unique like its alivness and immediacy of the MUSIC due that transients are faster than in a normal cartridge designs but as any audio subjects all has its trade-offs and each one of us choose the personal best trade-offs to achieve our targets. I sold the Ikeda's that just can't fulfill my targets and that's it.
R.