Substituting subwoofer for Yamaha tcd av1?

New to hooking up surround sound. I have a Yamaha cinema station tcd av1 with speakers, cords, deck, but no sub. Could I swap in another sub to connect the speakers through to the deck or should I get the sw av1 model its missing? (would prefer to avoid that since I have quicker access to other subwoofers).
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