What's phase 0 degree - 180 degree?

worldcup...for a detailed explanation to your questions let me refer you to lars fredell's article on the subject in the summer 2000 issue of ultimate audio mag. the terms 'phase' and 'polarity' are used interchangably most of the time.when cds or sacds are recorded they are recorded either in 'phase' (absolute polarity)( 0 degrees) or out of 'phase' (reversed polarity)(180 degrees).recordings that are 'in phase' or absolute polarity' will have deep taut bass good sense of air and transparency and dimensionality.those out of phase ( reversed polarity) will have bass that is not as deep or taut,sibilance might be too pronounced and strings too glaring.( i'm quoting lars here)the 0 degree and 180 degree designation on your sub allows you to dial in absolute polarity or switch it 180 degrees. some record companies cds and sacds (sony for one) are recorded out of phase.(the U.A. article has a list of recording labels and the usual polarity they record in).i would get the mag. and refer to the list when playing cds or sacds and play with the switch. your ears can usually,like yours already have,tell when a recording is 'in phase' or 'out of phase' ( absolute polarity or inverted polarity) hope this helps a little. dave smith 'calloway'