Just got the reply from Erik at SVS:
"Hey Ben;
You can use the 80hz highpass crossover on either the low or high level inputs/outputs. You can connect the sub in between the source and the receiver or between the receiver and the speakers. The only difference between the hookup methods is that the highpass filter on the low level inputs is 12db/octave while on the high level inputs it is 6db/octave.
Erik K"
I'll try the low level at 12dB/octave first, I think this is a little too steep, M22ti doesn't has much bass to begin with, anything below 60hz is weak so 6dB/octave should roll over easier and more natural sounding. I'll have to play around with different connection when I get the Sub tonight.
