HT cross over question

i suggest NOT going through inferior sub cross, and simply go full range direct for stereo, and maybe run sub from parallel speaker connections for music duties. then, id run sub line level n crossed over from Yamie processor for movies, also crossing over mains from processor setting in yamie to match for movie applications! keeping sonic midrange n treble purity is key, and then necessary processor internal EQ for the MORE demanding dynamic ht duties, is critical,

Historically, crossovers built into powered subwoofers have been anything but sonically pure regarding passing midrange/high frequency signals!..degrading overall sound quality to the monitors. Thus, bass is least of my concern in 2 channel music, and keeping the purity of the delicate mid and upper registers is paramount, and i'd default to running speaker level through a switcher top the powered sub, and defeat that for movie playback, if it where me. Again, I would venture that any AB comparison for sonic purity of mid/hi, going both through the sub woofer crossover, and without it, would easily be a discernable advantage,if you NIXED the sub's mid/hi-pass crossover in the mix!!
Nope, seriously doubting that's the best route, IMO

See here in lies one of the problems, in that you're attempting to do a dual purpose system, and you want convenience, and the sonic advantage of a dedicated outboard 2 channel pre plus outboard AV processor working in the same system - which you will have to switch the later in and out of the system anyway. It's a compromise of convenience to isolate the better 2 channel pre-amp for music duties in the setup. This causes a dilema in how one chooses to deal with how the powered subwoofer is to be used in both systems simultaneously, and remain effective for both. And, I find, you either often end up compromising the perfectly flexible and integrated subwoofer transition while swicthing between the two systems, or you maintain the best integration of mid/hi freq sonic purity whilest switching between them, and maybe have a not so convenient subwoofer conversion between the systems! Neither is likely ideal, and has it's pro's and con's in an ideal world.
If HT was my priority, I'd be likely nixing the seaparate 2 channel analog pre amp all together, and simply go with a high end digital AV prepro, and just process my music internally in the DAC's in the pre, with all digital connections, and analog converted or passed direct when you do tuner, turntable, etc. There are a number of them out there, that still sound superb for most people's tastes and applications, such as in a custom integration setup.
If music is your priority (such as yours), I'm probably doing what I suggested, and simply throw a speaker level switcher to switch in and out of the way for the subwoofer in parallel connection for music, and going straight out of the analog 2 ch preamp for music, running the sats full range. (the line level is disconnected when the AV pre/pro is turned off and not in use). Then, when it's movie time- and the AV pre is on and looped in to the 2 ch analog pre - you simply are using the internal digital 80hz crossover to all channels, and the subwoofer is filling in the bottom from the LFE output of your processor -and simply switch the speaker level out of the way from the switcher! Seems pretty straight foreward to me.
Again, this way, I get pure sonics to my sats for full range music, and get to add bass run in paralell. No other crossovers will do anything but degrade my signal purity that im asking out of my expensive analog 2 ch pre, otherwise.
But hey, that's me

Well just remember, you're not really using 200 watts of current at the box, since you're really only "taking a signal" off the wires at the sub!..not powering the sub with speaker wire connections. So, I don't believe you're actually drawing current there.
And I would 100% state that using speaker level subwofer connections is 100% better for simply bass signals to the sub, than it is using speaker level connections through the subwoofers internal highpass crossover, and out to the satalite speakers, driven that way!!!! Same can be said for line level connections to the sub, filtering out to the sats, as well.
Just never heard one setup where the sound from the mains was anything special going through the likely cheap crossover parts thrown into a powered subwoofer, as an "after thought". Wouldn't do it..
I like my earlier suggestions, yes.
Hope it works out for you

yes, typically, if your using two crossovers in a subwoofer's path, usually, you turn the later all the way up and out of the way. The one in front gets set to the 80hz. So, connected to the AV pre, you set the pre to 80hz, and sub to 200hz, and so forth. With parallel speaker level connection, however, id run full range from analog pre amp and then set sub cross at wherever main speakers naturally roll off, usually...otherwise, set to 80hz if filtering mid/highs as you first suggested you connected things.
Main thing is really not to set two crossovers in the same path at same location!! Weird phase issues can happen. That's the main issue. So one you will need to set high, and the other about where you want it set, in this case, the discussed 80hz location, and you shouldn't run into any problems associated with two crossovers in front of one another.

Sorry im confused. Do you mean Line level swich being fed both from the AV pre's LFE out put and also from a pair of line level out's of a 2 channel pre into the sub (switcher switching between the two differnt sources - or preamp/processors?), or do you mean other?
Of course, you could play with all of the above, and see what works, but I mean simply a speaker level switcher for simply taking the parallel speaker level connection out of the way when you're doing AV pre/pro in the system for movies, so that the sub isn't seeing both the line level and the speaker level to the sub at same time!
Are we on same page, or am I not understanding the question? a