What is the difference between a line level input with 'L' and 'R' RCA inputs and an LFE input in a subwoofer? - Quora
![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)
How 2 hook up a active subwoofer to a receiver or integrated amp with no subwoofer pre out on unit - YouTube
![SMSL AO200 MKII High-Performance Bluetooth 5.0 Power Amplifier with Balanced Input and Subwoofer Pre Out - AliExpress SMSL AO200 MKII High-Performance Bluetooth 5.0 Power Amplifier with Balanced Input and Subwoofer Pre Out - AliExpress](https://ae01.alicdn.com/kf/S2dca09b9b8fd4c4b9a34a63b1a556c1aw.jpg_640x640Q90.jpg_.webp)
SMSL AO200 MKII High-Performance Bluetooth 5.0 Power Amplifier with Balanced Input and Subwoofer Pre Out - 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?width=640&crop=smart&auto=webp&s=351c9a60687f70d462dd5882fbe06ea993abd2c7)