Pre Out vs Line Out | Audioholics Home Theater Forums
SMSL AO100 High Quality Power Amplifier Bluetooth 5.0 reception Subwoofer pre out Infineon MA12070 Power Amp chip 70W*2 output| | - AliExpress
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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