I realize no one answered this thread yet, but I see a few people looked in, so I thought i would add the solution.
It turns out most newer TVs allow one to adjust the output 'power' or 'volume.' So, where this seems to be the case, one can go into the units options and choose between 'fixed' and 'variable' sound output selections. If one chooses the 'fixed' option (default) this sends max 'volume/signal' to the amplifier. If one chooses 'variable,' the TV's internal volume control allows control of the output signal.
From what I've read, most amplifiers should be fine with the default, but mine can break windows at mid level settings with an output signal of 15/60.
Anyways, thanks for reading and hope this helps someone else in the future.