Pioneer receivers (at least the ones with Advanced MCACC) do have corrections for the sub channel. They have a 3-band parametric EQ with variable Q, and phase adjustment to align them with the main channels. All of this is auto configured.
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Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris