I'd suggest you talk to the dealer who you bought the speakers from looks like the Dyn subs integrate with the speakers but the web site is not great in revealing all the details. I'm not sure how you'd connect the node to a sub and control both the sub and output volume levels so again talk to the dealer.
Do your speakers have a sub out ? if so use that. if not do the Dyn subs have integration for the speakers? The SV sub can integrate this via the speaker input but since your using powered speakers you wont be able to use that. again talk to the dealer who sold you the speakers.
Do your speakers have a sub out ? if so use that. if not do the Dyn subs have integration for the speakers? The SV sub can integrate this via the speaker input but since your using powered speakers you wont be able to use that. again talk to the dealer who sold you the speakers.