![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?width=640&crop=smart&auto=webp&s=351c9a60687f70d462dd5882fbe06ea993abd2c7)
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
![Amazon.com: Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control : Electronics Amazon.com: Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control : Electronics](https://m.media-amazon.com/images/I/61H0451axVL._AC_UF350,350_QL80_.jpg)
Amazon.com: Fosi Audio BT20A Pro 300W x2 TPA3255 Bluetooth 5.0 Home Audio Stereo 2 Channel Amplifier Receiver Mini Hi-Fi Class D Upgraded Integrated Amp for Speakers with Bass Treble Control : Electronics
![Would I be able to connect my powered subwoofer to Pre-Out of my Maratnz SR4021? : r/BudgetAudiophile Would I be able to connect my powered subwoofer to Pre-Out of my Maratnz SR4021? : r/BudgetAudiophile](https://preview.redd.it/g61q99j76sk51.jpg?width=640&crop=smart&auto=webp&s=cbc256d819556b7393dee6db10f5efeed529aa5d)