Bi-amp the Infinitys, AR D-75 high pass/Peachtree low pass. The Kappa 9s can dip as low as 0.8 Ohm and the Peachtree GaN400 has handled it with no problems thus far. Now using the PS Audio DAC as a preamp, streaming Tidal via Bridge II.
This posted before I completely finished with all photos, so I'm leaving it as-is (incomplete) and added a brief description. @mjcmt, bi-amp. The AR is currently getting serviced so fully running the Kappas via the Peachtree at the moment.