Thanks to everyone for their comments. I performed the following experiment to see if I truly understood phase:
I found a record that I did not feel had any phase problems.
1. I switched the polarity of one of the speakers. The sound had a very unusual timing problem, as if one speaker were reaching my ear at a different time than the other.
2. I switched both speakers. I can't explain why, but suddenly the LP sounded like a CD. It was decidedly colder and transitions seemed choppy by comparison to having correct polarity.
The difference between switching only one speaker is far more pronounced than switching both.
I found a record that I did not feel had any phase problems.
1. I switched the polarity of one of the speakers. The sound had a very unusual timing problem, as if one speaker were reaching my ear at a different time than the other.
2. I switched both speakers. I can't explain why, but suddenly the LP sounded like a CD. It was decidedly colder and transitions seemed choppy by comparison to having correct polarity.
The difference between switching only one speaker is far more pronounced than switching both.