Jared, I use fitness pads under my 1723 THX center channel, it helps significantly and reduce lobbing. Here is a source you could find on amazon.
FORLRFIT Balance Pad for Physical Therapy,Non-Slip Foam Balance Cushion for Yoga,Fitness Training, Core Balance,Strength & Stability- Standing Mat,Knee Pad &Foam mat https://www.amazon.com/dp/B07M8XS713/ref=cm_sw_r_cp_api_i_0S6J2PV97CSNN4P1K238?_encoding=UTF8&psc=1
