Those would be house amps. And if they are in the system (not recommended) they should be noted on the print or tombstone with an H.A. for powering to let the techs (that can read a print) know that they are not powered from the P.S.
God is great, beer is good, and people are crazy.
This is CABL.com posting #324528. Tiny Link: cabl.co/mbwAu