Hello I have an Onkyo HT-S3700 5.1-Channel Home Theater Receiver/Speaker Package and my subwoofer has started to make a popping sound. I assume that the sub is popping because it is not receiving enough power from the receiver which is causing damage. Unless there is an easy fix that I am unaware of, I would like to replace the sub (which is only powered from the receiver) with a traditional sub that has its own power source. My question is about the new connection because most subs that i have seen only have rca inputs and not line level inputs. Is it safe to just use a Line Output Converter to change the input type? If so what would i do with the L/R wires on the converter because there is only a single output on my receiver for the sub with a positive and negative, but most LOCs have 2 sets of positive and negative wires. I am looking at this sub https://www.amazon.com/Acoustic-Audio-PSW-8-Powered-Subwoofer/dp/B002AT94HE/ref=sr_1_1?s=electronics&ie=UTF8&qid=1494167647&sr=1-1-spons&keywords=subwoofer&psc=1 which has a high level input. Would i be able to simply plug my single speaker wire into the high level input and if so would i have to split the positive and negative into 2 wires because there is a left and a right? Would this be the way to go or would using a LOC and plugging into the rca line ins work better/safer? Thank you for your help i have done a lot of digging but have not been able to find conclusive answers to my questions.