Magna 158 Speakers For Bass

[Zulubilly]

I have a pair of sunn Magna 158 speakers and I was curious if anyone has used them for bass guitar.
Do they crap out when you hit the low E or do they stand up to it without flapping.  I will be using a Sunn Sorado head to push these in a 215 caabinet.

Thanks,

Zulu