Reverse polarity

I have my highs reversed with the lows in correct polarity. If I put the highs in correct polarity I lose it all, very muddy.

Any thought's ??

Bat VK-5 pre
Bat VK-60 amp
Dali Grand speakers
Your speaker cables may be labelled improperly. Also, try this; listen to a song that normally has the vocals as a centre image in between your speakers. Is it still in the same place?
Check polarity with a battery.
What happened was my amp came back from upgrading/repair and 1 of the up grades was new Cardas post and I got them backwards cos they are not marked for multiple taps so I looked at a few pics on the net and found out they were reversed.