How can I add A subwoofer to my 2 channel receiver?

[jmehrhardt1]

How to add a subwoofer to a 2 channel receiver without any other output?

 

[Alabalcho]

By using an audio-splitter, possibly a separate subwoofer amp or possible cut-down filter if your subwoofer does not have one.

 

[americanaudiophile]

Connect a speaker to line level converter in parallel with the speakers. Connect the subwoofer to it.