Older amps will often have a "Mono" button which can alleviate this effect to a limited extent, though the resultant "reprocessed mono" mix won't be quite the same as the original. I always think of this as the "Collection of Golden Oldies" effect, as the original stereo mix of this Beatles compilation was the first time I experienced it. "Interfered-with stereo", as ppint would have it.
A local charity shop with a long and narrow trading floor has one speaker near the door, and one placed towards the rear wall. Some of the music played there can sound a little strange,,,
I was overjoyed to have found a Timi Yuro album at last, as she has an incredible voice, but this is almost unlistenable due tot he "creative stereo" mix of the tracks here...
..it's one of those highly unusual conceptions of what you should do with stereo, where her voice is entirely on the left channel, and all else is on the right, with absolutely no blending or crossover.
I listened at my right speaker, and could only hear a distant echo of Timi's voice, and at the left, only a suggestion of any instrumentation under her voice.
What were they thinking?!!!
This is extremely distracting, and off-putting, to the extent that I couldn't listen past the third track anymore.
I hope this exists somewhere mixed better, as the tracks themselves, and her performance are great, just spoiled by an ee-jut at the desk.
Avoid this issue.
((Unless you wanted to lift Timi's vocal for a sample to be used in one of your own tunes, then you've got a pretty much untainted grab))