Speakers sound too bright.

The app sends tones through the speaker and then gives me the result. Either positive or negative. 

@rwalsh07 , I am about as low tech as it gets  when it comes to apps and such, but it sounds as if your app is telling you that the speakers are out of phase with each other. But I could be wrong about that, as I am not by any means an audio or electronic guru.

I actually use a Sheffield Labs test CD with an in phase/out of phase track. It’s either Rodger Scoff or Doug Sax (I think it’s Rodger on that track) saying something to the effect of, "In phase--my voice should be located between your two speakers and tightly focused," and then, "out of phase--my voice should have no apparent focus and should sound as if it is coming from all around the room." And on my system it does. But that’s about as high tech as I ever get with that.

Obviously, I'm not either given me having to ask the question.  lol  I appreicate you chimming in though!

To test a speaker use a standard battery, 1.5 to 9v and connect to your speaker.  positive to positive should move the woofers towards the listener.  Most important is for both speakers to move the same way.

Ignore the app. Make sure the amp’s positive (red) terminal is connected to the speaker’s positive terminal and the amp’s negative (black) terminal to the speaker’s negative terminal. On both speakers. If one speaker was connected backwards, the bass is out of phase and will cancel out.

If the speakers are connected correctly (see above) and they are still too bright, try replacing the positive terminal strap that connects the upper and lower positive speaker terminals with a small value resistor and connect your speaker cables to the lower set of terminals. 1 ohm, 1.5 ohm or 2 ohms will drop the level of the midrange and and high frequencies a touch, more with the higher values.  5 or 10 watt resistors are far cheaper than new speakers!  And before I get roasted for modifying the crossover, please note that Wilson, Magnepan and others offer this same option to tune the level of their high frequencies, too. Those M-L speakers are excellent, don’t give up on them!