Originally Posted by isaacstaco
After doing some research, i've read of people connecting the sub to the left/right speaker inputs on the receiver ...
on the receiver.
If your sub is powered and has speaker level inputs AND outputs, you can connect your AVR's main (or "A") L+R speakers outputs to the L+R speaker inputs on your sub, then connect the L+R speaker outputs on the sub to your L+R main speakers.
In the subwoofers speaker set-up menu, you'd set Subwoofer to "None" (or whatever HK's equivalent setting is).
Then you'd adjust the "crossover" on the back of the sub to ~80Hz or to whatever frequency you find provides the best balance between the sub and speakers.