Can I connect a powered sub to a passive sub on system

MOJOROX

Prominent
Jul 13, 2017
6
0
510
Pioneer VSX-918Vk,2 front spkrs, 2 rear and one Polk subwoofer. I also have an extra car audio passive sub. Is there any way in this system to connect the pace? The receiver has a sub preout, a sub out and q center, in addition to speakers A, B and SS (L, R, Ctr) . Anything I can do except make it a end table?
 

MOJOROX

Prominent
Jul 13, 2017
6
0
510
I understand and I kind of figured. Good to have my intuition confirmed by an expert. If I may, one more question? What about using the passive sub as a simple regular speaker?
 

MOJOROX

Prominent
Jul 13, 2017
6
0
510
Thank you for the quick response. Much appreciated. Reckon instead I'll just use it as intended, put it in car and head back to school, 40 yrs ltr lol