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.
Spendor D9.2 Run In
Just got new Spendor D9.2's, primarily because of the well regarded midrange, and wanted to know how long the run-in will take based on experience. I generally don't play them loud, but when I do they seem to blare. A bit concerning. Also when played at moderate levels the mids sound tuned high. What is the deal? Thanks