If a speaker is properly labeled, the cone travel should be outward when briefly touching an AA battery to the terminals observing the labeled polarity. Speakers
out of phase in stereo can sometimes be detected by lack of bass, though it’s best done with a mono sum.
From: John Stortz [mailto:email@example.com]
Sent: Wednesday, April 12, 2017 12:11 AM
Subject: Re: [CRTech] Re: [BC] Phasing Issues? **UPDATE**
While on the subject, can anyone reading this claim they can hear an out-of-phase stereo audio, by just listening to the audio in STEREO?
Speakers are carefully labeled "+" and "-" but does it really mean anything? IS "+" the same direction for all speaker models & manufacturers? I doubt it.