Your most indispensable "tweak"?


Trying to narrow my possibilities down... 
redwoodaudio
I went from cleaning my KT188's with Windex to using Pledge.
Things sound much more polished now.
@stvgray 

That's a great suggestion.  May I ask you about it? 

I assume the electrician used Romex.  Where I live the minimum required Romex is 12/3.  And that's what all the electricians use routinely  if nothing else is specified.  Did you use that, or a lower gauge (thicker wire)?  Also, how long was your run?

Thanks.