I've found a tune that brings my active LFR system to its knees. Not sure yet if it's the amplification or the speakers that are the limiting factor. I can hear low frequency distortion at ungodly levels. This is likely where the twin 500s would help.

https://open.spotify.com/track/7AfZO99SLUostJ2ZS8tN6D?si=y4LnJsJPQvuACPPDreLcPw

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated