I own a 50 watt Sony sub that came with my theatre in a box, and just bought a 75 watt sony sub to replace my current one (until I upgrade my system entirely). Now. I did some expierementing, but not sure if its safe/works/accurate. I bought a Y Monster adapter (allowing me to connect two wires in one plug) and connected both subwoofer cables into the sub output on my reciever. In other words, I have two subs going at the same time off of one sub connection on the reciever. Should I just connect the 75 watt only? Is this a good idea? Any help would be appreciated...thanks in advance!