What is a Pre-Out on an A/V Receiver and When Would You Use It?
Difference between subwoofer out and subwoofer preout purple rca connectors on onkyo tx nr646 question | AVS Forum
Onkyo TX-NR6100 7.2-channel home theater receiver with Dolby Atmos®, Wi-Fi®, Bluetooth®, Apple AirPlay® 2, and Amazon Alexa compatibility at Crutchfield
Onkyo TX-DS787 sub pre-out "broke", using hi pass works?? | AVS Forum