Are you asking me?
...and you give me far too much credit. What I find is that a lot of the time people take one piece of information and stop. "Can I connect two subs to my one output? Yes, you can." In reality, there are almost always a lot more factors to consider, just like with the...
If you aren't using active crossovers like Bob is talking about, which you wouldn't be, it's highly debatable whether bi-amping does any good. Also, Klipsch speakers are extremely efficient, so any benefit is reduced even more. Regarding the harshness of them, that's simply a characteristic of...
@Standsontoes , you connect the sub out (which is LFE) to the LFE input on the subwoofer. It only has one output for the main room, so you'd have to split it for two subs. Keep in mind that is more complicated than you might think. With receivers that have two sub outputs, you can set...
@Bob Bielski , I know the idea of full size speakers for Atmos sounds cool, but as far as I know, Atmos has a non-defeatable high pass filter at 120Hz. Going to the trouble of mounting speakers on the ceiling that weigh 80 lbs. each is probably just a complete waste of effort, time and money.
A line level output from the phono preamp would be better than the output from the turntable, but I have zero experience with sending signals that far. 80 feet is an extremely long distance to go. I would expect problems all over the place and all sorts of compromises.
I would try the sub between the center and right speaker instead of so far over to the side. Between the center and left puts it pretty close to the center of the wall, which is bad, so right is the better choice.