Klipch icon speakers

https://www.grays.com/retail/JA3SUB3S-RF/audio-tv-and-home-theatre/jamo-a3sub-3-active-subwoofer-sil...
Biggest sub I can fit in this room , I thought it went lower ...
my klh goes lower but it’s in garage they will notice I moved it KLH ASW10-100 Powered Subwoofer (Discontinued by Manufacturer) https://www.amazon.com/dp/B000021YRV/ref=cm_sw_r_cp_api_glc_fabc_MTH0CRSAKYEV7MTVGJDJ

I still haven’t moved my better receiver
it’s deeper then my TV stand is wide. 
I’m testing the towers out on a old Sony tomorrow. The room is small not sure if I can fit the icon center channel in the room . 
I am moving my system from another room into it . 
If I ever switch TVs center won’t fit under the bigger one . But the 4k isn’t good for cable no mater how bad I try and adjust picture. I don’t understand it they get good reviews often .

Unless onkyo 818 can make cable look better should I stick to my smaller hdtv ?
May need a larger stand for a 55 then the 40” stand . Better Picture quality over size probably superior ehh ? I’ll look see if there’s a video section on here .

main tv room for me but it’s a smaller room . My concern is audio quality more so for now . I may be able to bring my 10” jamo sub in the small room but I got to set it beside the couch in a corner .

35hz is low enough but those speakers are 38hz at 3db down so a sub would help out.