We've beaten this subject to death. Short answer: You can have one, but you don't absolutely have to have one. Take a look at this thread:
https://forum.audiogon.com/discussions/there-s-a-lot-more-bass-in-a-6-5-driver-than-most-of-you-thin...
If you feel you are missing slam, maybe look into improving the speaker placement or adding room acoustics. They may give you more for your dollar without adding a new speaker which may be hard to fit acoustically.
Best,
E
https://forum.audiogon.com/discussions/there-s-a-lot-more-bass-in-a-6-5-driver-than-most-of-you-thin...
If you feel you are missing slam, maybe look into improving the speaker placement or adding room acoustics. They may give you more for your dollar without adding a new speaker which may be hard to fit acoustically.
Best,
E