Wadia Inuition (Class D amp) connect with subwoofer

JL Audio LoC-22 - line output converter may work for your setup.

Wadia Inuition speaker connectors > JL Audio LoC-22 > SVS SB-1000 line level input.

The JL Audio LoC-22 featured differential-balanced input architecture and compatibility with most amplifiers. It is a active speaker level to line converter need a 12V dc power supply.
You can contact JL Audio to confirm if their LoC-22 compatible with your Wadia Inuition.

JL Audio Customer Service: (954) 443-1100

To nobble100:

So why is REL saying that 90% of class D subs have positive voltage coming from the black (-) terminal? Is this a load of crap?

 

 

Again, stated here:

 

https://relsupport.zendesk.com/hc/en-us/articles/115004486607-Class-D-Amp-Connection-Methods