![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
![Best material to make those little metal preamp jumpers? | Audiokarma Home Audio Stereo Discussion Forums Best material to make those little metal preamp jumpers? | Audiokarma Home Audio Stereo Discussion Forums](http://img.tapatalk.com/d/14/04/27/pamehunu.jpg)
Best material to make those little metal preamp jumpers? | Audiokarma Home Audio Stereo Discussion Forums
![what does this pin do?? Does it act as pre-out and main-in?? I did red the manual and still didn't figured it out… 🙏 SONY TA-F690ES : r/vintageaudio what does this pin do?? Does it act as pre-out and main-in?? I did red the manual and still didn't figured it out… 🙏 SONY TA-F690ES : r/vintageaudio](https://preview.redd.it/what-does-this-pin-do-does-it-act-as-pre-out-and-main-in-i-v0-1wgrmgujelea1.jpg?width=1063&format=pjpg&auto=webp&s=5623d9daa058ba153813b2ecaf4b798ade25f9f9)