Spendor D9.2 Run In

All new speakers take a few hours/days for the woofers to break in, but it shouldn't take that long.  Play some music with strong bass at moderate levels and let them stretch a bit.  Donald Fagan "Morph the Cat" is good.  Cassandra Wilson "Blue" is good as well.  Spendors are not forward speakers, so if they sound harsh after a week or two, it's something else in the chain.  I assume you bought without audition?  It's an occupational hazard in the modern hifi buying experience.  But I think they'll end up sounding more balanced after a few days.  

I have McIntosh components: C2700, MC275.  I felt sure they would act to mellow the sound.

Congratulations on your purchase. I have not heard them… most speakers at least a hundred hours. Typically most speakers are trebly and have wooly or flabby bass… don’t panic.

Nothing worse than mixed feelings about a new purchase. 

If you put some photos of your system under your user ID we might be able to identify some other possible factors.

I suspect you're reacting to the LPZ polyamide domed tweeter.