Ok, I have a few quick questions for those of you who are more in the know about the stereo out or rick-o-sound on my 4003. First, I have a Genz Benz GBE500 that have an active and passive input. Can I use a stereo Y-cable and plug one end into each and achieve the famed sound or does it require two amps??? Second, exactly how big of a difference is it in the sound???