Oh come on, this is so obvious to even the greenest of audiophiles....
Are you right or left handed? Right brain or left brain? Conservative or Lib? Nascar or F1?
istols:
Gee..... Come on.....:nono:
Honestly, owning a 2270 for close to 20 years, I never really took it for more than a gee wiz feature.....Ok, here's the real deal straight from the owners manual....
"When playing a monophonic phonograph record, use these pushswitches to suppress rumble, common mode noise and pinch-effect distortions."
So I assume they mean if you have stereo cartridge playing a mono record...you may get better sound quality by using only one of the two channels....
It also recommends pressing both in to create mono play back or one when you only have a mono single source input. That is the obvious part.
Once again Marantz doing the right thing for its customers.... But mono records disappeared pretty quick in the late 60's and early 70's.
Good question, the answer was more complex than you would think....:thmbsp:
johnk