Adcom GTP-555 question

I have a Adcom GTP-555 which has 2 main outputs (LAB/NORMAL) for the output to the power amp, in my case I am using a carver A400X(LAB output), my question is can I use the output not being used (NORMAL) for the power amp and use that to connect to the line input on a sub woofer (sub does not have the High level speaker connections or else I would use them),
this way eliminating the the use of Y splitters.

(The LAB/NORMAL main outs correlate to what type of amp is being used according to the owners manual)

Thanks for any input