Simply adding a subwoofer to my integrated soundbar TV? (Panasonic TX-55FZ952B)

[pipnina]

I have been enjoying the TV (model in title) with my dad but I have wondered if adding a subwoofer to its sound setup would give it a more... cinema quality sound? The sounbar sounds pretty good (certainly a lot better than integrated speaker) but it doesn't have the ability to produce those powerful low frequencies.

I can't see a suitable black AV jack at the back for a subwoofer, but Panasonic sells wireless Subwoofers on their website (sadly I can't find them standalone, only in 2.1 of more config). But this tells me I could potentially get one unit to connect to the TV and just... pop subwoofer ranges into my home TV experience?

 

Any ideas welcome, I know a fair bit about displays but audio is a little more finniky. Wouldn't say a budget because I don't even know what the range is for that kind of equipment yet, but guessing something decent is £100-400 GBP?

Cheers.