Both subs are powered and turned on. Not sure what you mean by, "what input". I just tried a manual configuration where I flagged the sub as yes and turned up the db to +8. Very little to no response in both subs.

Larry
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Pioneer Elite Rear Projection
Outlaw 990
Outlaw 7500
Pioneer DVD
Martin Logan Fronts
Linn Center & Rear
Klipsch Sub
Lucid Accoustics Sub