![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 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](https://preview.redd.it/d66cdilbzae11.png?auto=webp&s=b800f083815aa5ad7cc313e1925f787e9dab0c31)
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
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SMSL AO100 Power Amplifier 70W*2 Bluetooth 5.0 Subwoofer pre out for 2.1 System EQ modes MA12070 Power Amp With Remote Control
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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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