Marantz 22xx knob "alignment"

Yes, that is correct. Float the twisted negatives in space.

Press the mono button. This is important. Otherwise you will merely hear all the difference information in the stereo recording. That, in itself can be interesting and is the basis of the 'rear presence' speakers often used in the 1970s on receivers and systems to simulate a 'surround' effect.

The null is a very useful way to determine volume tracking and any phase differences between amplifier channels. Ideally, dead silence is your goal at all volume settings, but volume pots simply don't track well enough for that. Pick your normal listening level position on the volume pot and balance it at that point perfectly. I always use this method in my own system.

Again, only to be used on common ground, not BTL (bridged, tied load) amps.

Just to followup, this worked really well. I was never able to null the sound out completely, but got it very close. Turns out the knob was off center just a touch. Thanks for the help!
 
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