I'd throw the Sony away.
I am hesitant to even call it a subwoofer. 6.5" driver, and 23W amp. It's not going to do much of anything, and what it does do probably won't sound that great...
MiniDSP 2x4HD, UMIK-1, REW... The holy trinity for running multiple subs.
Espon 5050UB, 120" screen, AppleTV4k, Harmony Elite, Sony UBP-X700, Pioneer Elite VSX-LX504, Outlaw 7000x, MiniDSP 2x4HD, 2x HSU TN1220HO subs, 2x HSU VTF-15H Mk2 subs, Defintive Technology speakers: CLR2002 x3 for FR, C, FL; BP2x SR & SL; BP1.2x SBL & SBR; ProMonitor 800 x4 height speakers.