The only thing I'd worry about is that they came from an X5. They are all tuned to the speakers in each vehicle, and maybe, just maybe, to the vehicle itself (internal volume/shape affects the tunes).

I wish German Audio Specialties made an X5 crossover. I'd recommend you toss that and a decent amp in and you'd be tons happier than a stock amp (or so I've been told).

__________________
Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual