Headphones < Speakers < PC?

Tail_TL

Honorable
Jul 5, 2013
27
0
10,580
I'm quite a newbie on this, and I'm curious.
I have some old Speakers which are quite good, and it has a big subwoofer (Or atleast I think thats what it is)... And I was thinking, it has a headphone input jack on 1 of the speakers next to a volume controller, can my sound quality be improved if I plug in my HyperX Cloud 60Ohm Headphones?

Is there any risk in breaking anything? if I turn down the volume on the speaker to match my current volume without the speakers? Can I use the speakers as a soundcard or something for my headpones? Since I can't afford to buy an amp or a soundcard.