Why are these pre out / main in just connected like this? And also, would you use this to hook up a powered subwoofer? Technics SA-R921 receiver. : r/BudgetAudiophile
What is a Pre-Out on an A/V Receiver and When Would You Use It?
NAD 268/368 set up assistance req. | Stereo Amplifiers & Pre-Amps
Pre Out Vs Line Out - Find the Difference? - ElectronicsHub
Subwoofer Pre-out [Everything To Know]
How 2 hook up a active subwoofer to a receiver or integrated amp with no subwoofer pre out on unit - YouTube