Crown Studio/Macro Reference Amplifier Feedback points

Does anyone have any opinion on why there are two feedback take up points in "Grounded Bridge" Crown Studio/Macro Reference Amplifier. There seems to be two loops one before the output coil and one after it. They seem to be called high and low feedback lines on the schematic. .

Is there any benefit to this arrangement?

Thanks.
 

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  • Studio-Reference-Schematics.pdf
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