My computer has Realtek's HD Audio Manager installed, and recently, I bought a subwoofer to add to my speaker system. Previously, I had been using a
quadraphonic system. Now, I plugged in my new sub into my jack on the back. The jack, according to Realtek, is a center/subwoofer jack. So, after plugging it in and testing that it does work, I went to the manager, and told it that I had...