The out of phase track on the XLO Test CD will provide proof that the system is either in correct absolute polarity or reverse polarity. When the system is in correct absolute polarity discs that are OOP will sound more diffuse (less focused) and lack bass response, relatively speaking. According to the Polarity Pundant about 90% of audiophile discs are in reverse polarity.
Here's the whole story,
http://www.absolutepolarity.com
Here's the whole story,
http://www.absolutepolarity.com