Darkmoebius,
How old are the tubes in the LS16? Sounds like they need replacing? I heard a BIG difference when I went from single ended to balanced using my LS25 MKII. I had a slight hum that wouldn't go away, as soon as I changed to balanced it disappeared! And the single ended cables were in excellent condition prior to changing. Each system will offer sliightly different results, it's that synergy word again.
How old are the tubes in the LS16? Sounds like they need replacing? I heard a BIG difference when I went from single ended to balanced using my LS25 MKII. I had a slight hum that wouldn't go away, as soon as I changed to balanced it disappeared! And the single ended cables were in excellent condition prior to changing. Each system will offer sliightly different results, it's that synergy word again.