Well, this'll drive Nick crazy, but it's nitpick time again:
The output voltage of your deck in this instance make no difference
whatsoever
to "how hard the amp works".
Good point.
And no, I don't consider this nitpicking at all........because it wasn't my
post (JUST KIDDING).
That was an important clarification: Pre-amp voltage makes no difference
regarding how hard your amp works.
MOSFET