No. The subs will perform according to the THX specifications
for the subs when used according to their parameters. Just because the AVR doesn't perform to those same specs is immaterial.
The Outlaw and Monolith subs all seem to be very good product, as best I can tell (with my experience only really being with the X-13s).
The soooner you move beyond the Klipsch Subs, the better. Don't double down on that. Rather invest in the better sub now, use the Klipsch as a second sub for the short term and when you can double down on the second matching sub, pull the trigger and kick the Klipsch into a bedroom setup or sell it!