Speakers sound too bright.

I would think you would have noticed this when you auditioned the speakers.  I hope they covered their return policy when you purchased them.  Did you read any reviews?

Break in and room acoustics are both very important. Find a playlist, any playlist on your favorite streaming service and let them rip for a couple of days.  Then try listening to them again. Carpet, book shelves with books, curtains are some simple things you can use in your room. Here’s a cheap way that I still use.  I bought one of those cheap, foldable room dividers and tossed a comforter over it. 
 

All the best.

Please let us know how things are sounding after break in.  You may get some very noticeable improvements.  It will be a question of if it's enough to make you tap your foot!  Good luck and cheers. 

Maybe borrow a pair of speakers with soft dome tweeters? 

Thanks everybody.  I'm going to let them break in and give them a chance.  I will make the suggestion of jumper wire and the bi-wire option.

That being said, what about the polarity discovery that I mentioned above in the thread.  One speaker had a positive polarity and the other speaker had a negaive polarity.  Speaker cable connection are running positive to positive and negative to negative.  Is the polarity discrepancy normal.  Do I leave it as is?