OK, here's the deal. My reciever has one subwoofer output. I connected a Y-splitter cable (Monster Standard) to the output so that I could hook two sub cables to it (Monster Cable THX Standard). Im running two subs at once, with one outputting major bass, and the other very quiet for some reason. Even when I turn the sub volume on the weak one all the way up, its quiet (but works). Both subs are almost the same (Sony active 75-watt). Whats wrong? Is there another way to hook up the second sub without splitting the connection? (Running the speakers through the sub wont work due to the mess of cables).