Powered sub, yep.
#1
Use the speaker level connections? Also yep.
Now MY question! Do you want to run the mains full range?
If yes, you don't have to daisy chain the mains thru the sub.
Just run another set of wires TO the speaker inputs on the sub. The speaker inputs on the sub have pretty high input impedance so no loading or other effects. Kind of like bi-wiring!
You probably don't need any exotic or expensive cabling. After all, you are interested in 80hz and down, only.
#2
use a splitter between pre and main. Run good quality, well shielded cabling to the subs low level inputs. Done.
The hazard with this? It is possible that the 2 input impedi in parallel will not be to the pre-amps liking. (Pre would like high impedance to work into)
#1
Use the speaker level connections? Also yep.
Now MY question! Do you want to run the mains full range?
If yes, you don't have to daisy chain the mains thru the sub.
Just run another set of wires TO the speaker inputs on the sub. The speaker inputs on the sub have pretty high input impedance so no loading or other effects. Kind of like bi-wiring!
You probably don't need any exotic or expensive cabling. After all, you are interested in 80hz and down, only.
#2
use a splitter between pre and main. Run good quality, well shielded cabling to the subs low level inputs. Done.
The hazard with this? It is possible that the 2 input impedi in parallel will not be to the pre-amps liking. (Pre would like high impedance to work into)