Hi all, I'm trying to connect my Logitech z506 system to my TV, but the only sound output on my tv is a headphone jack, 3.5 mm jack I believe. When I plug the jack into my subwoofer my rear two speakers sound really bad. I know that jack only supports two channels but it doesn't sound like those two rear speakers are even playing 2.1. Is there a way to convert to 5.1? Or at least make those two speakers sound better? They sound find when plugged into different outputs on the subwoofer Thanks for your help!