I have recently bought a Yamaha YST-SW215. (I have a modest HT) It’s a nice little sub with good pop. I was thinking of possibly getting another (Best Buy has them for $99.00). My question is with how it would be connected to my receiver combined with the other. Would it work if I connected a sub cable from the pre-out on the receiver, used a Y cable and split the connection, with one going to one sub and one to the other sub? Also, is it better to utilize both line-in inputs on the sub itself (using a Y Cable) ? I have read where there is no difference, and in other cases, it’s the optimal setup. Thanks in advance.