![SMSL AO100 High Quality Power Amplifier Bluetooth 5.0 reception Subwoofer pre out Infineon MA12070 Power Amp chip 70W*2 output| | - AliExpress SMSL AO100 High Quality Power Amplifier Bluetooth 5.0 reception Subwoofer pre out Infineon MA12070 Power Amp chip 70W*2 output| | - AliExpress](https://ae01.alicdn.com/kf/Sa3584762621746a9bd31162b46867150Q/SMSL-AO100-High-Quality-Power-Amplifier-Bluetooth-5-0-reception-Subwoofer-pre-out-Infineon-MA12070-Power.jpg)
SMSL AO100 High Quality Power Amplifier Bluetooth 5.0 reception Subwoofer pre out Infineon MA12070 Power Amp chip 70W*2 output| | - AliExpress
![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
![How 2 hook up a active subwoofer to a receiver or integrated amp with no subwoofer pre out on unit - YouTube How 2 hook up a active subwoofer to a receiver or integrated amp with no subwoofer pre out on unit - YouTube](https://i.ytimg.com/vi/Ew7G6H9YoVA/hqdefault.jpg)