subwoofer connection ?

Doc99
Doc99 Posts: 100
I want to connect a sub to an integrated amp that has 1 pair of dedicated sub-outs(no main in). The problem is that my Sub has only 1 input, instead of L/R inputs. I was told that using a y-connector from both L/R preouts merged to 1 cable into the sub is not a good idea.
Also, I wanted to then try just using a single cable from 1 of the preouts L or R! Then someone told me that this is not a good idea either, as I will only be getting 1 channel of bass! Is there a right way to hook up a sub with 1 input?
Will I just have to use the speaker line instead? :confused: