Beyma 15MC500?

I have "15CM V2 8 OH" (not exactly the same thing but similar) that I use to 500Hz and am satisfied with them apart from two issues:
1) frame rings when driver isn't in an enclosure
2) once with a lot of mid-range heavy bands entered heavy power compression and took a long time to cool down

One thing I notice with the 15MC500 is that it only has a 2.5" coil diameter so might have issues with rocking modes at higher excursions. If you have the budget I would recommend this driver:
https://www.beyma.com/en/products/c/low-mid-frequency/115P80FEN8/altavoz-15p80fe-n-8-oh/
I use it in some horns, it has a very powerful motor!
 
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That Beyma has a demodulation ring and the Faital does not.

If this is a two-way, consider a driver with ring(s) installed. More apparent at higher excursions. Probably not much of a difference if only using a couple millimeters of excursion.