preamp inverts polarity


I have a DeHavilland Ultraverve 3 preamp that inverts polarity.
my problem is my speaker cables, the negative cable is designed for negative terminal connection as is the positive cable is designed for positive terminal connection, so reversing the speaker cables defeats the design of the speaker cables.

what am I to do ?
mboldda1
Post removed 
Phase coherent speakers only offer a potential.  If the speakers are not set up properly its a wasted proposition. Set up is essential. Its like wearing eye glasses.  If one lens side is angled upward slightly, and the other lens is straight ahead... your eyes will tire you out.
Of course it’s only fair to point out that phase coherence is a different animal than Absolute Polarity.
Since Geoff reported my post because "blah blah blah" hurt his feeling, I'll repeat my point. Phase coherence was an 80's fad that made bold promises and generally didn't deliver. It doesn't seem to be as important as it's been sold to be. 
Huh? Why would I report your posts, Costco? They are often the high point of my day. My substitute for the funny papers, if you will.