I looked at Rogue website and owners manual and no input impedence is specified
so I would advise NOT running it till you get those values from manufacture or a Rogue dealer who understands the Vandersteen sub. There are several in the country, Michigan and CA
or IF you have Vandertones and voltmeter you can test for 3db down per the years or so, never needed a sub..but I understand others may need / want
hope this has helped