help with absolute phase

This is a guess. I think changing the phase is the same as turning the plug 180 degrees. If this is true a plug tester from Radio Shack would work. This is only a guess.

Many pre maker/designers do this. I saves one step the signal doesn't have to pass thru,within the pre. You just reverse the leads going to speakers themselves. The bass will be dead center and stronger when you are in phase.

About half of the CDs out there have the absolute phase reversed anyway. This makes a HUGE difference in the sound quality. The absolute phase MUST BE correct, so you (and everyone else) needs a component with a phase reversal switch. Some of the major labels with reversed phase are: Mercury, Capital, RCA, MCA, DG, London, EMI, Sony, Telarc, Teldec, Epic, Vanguard and Warner Brothers. For the complete list, refer to the article in FI magazine, September 1997. Food for thought: Years ago, many pieces of tube gear were raved about by high end magazines who loved to use RCA shaded dogs and Mercs as their test records. A lot of tube gear reverses phase so with these records, the absolute phase was correct. How many incorrect decisions were made because of this?