there's two different black shadows, one is a celestion 90 watt and one is an EV. Check the label to see which is which.
The EV drivers are some of the finest speakers ever made, but the problem is we have been acclimated to expect the sound of a celestion with heavy guitars. Celestions are not flat and not without color, and they break up quickly,that's what we like about them. The EV is clean and accurate and puts out exactly what you put into it, no more, no less.
I put a celestion black shadow in my fender deluxe reverb and about fell over it was so shockingly good. Way different than the original driver. But it was in a Fender amp so keep that in mind.
Both are fantastic speakers, they just do different things.