Got mine today, hooked up the amp via a DAC driven from optical output from PS4. Works great, love it!
Edit:
I hooked mine up through optical(direct from PS4) then a DAC to the amp, because my A/V system is finely calibrated and I wasn't going to go messing it up to get the LFE output high enough to drive the buttkicker amp.
My DAC is of audiophile quality, but I'm confident that the $20 ones on Amazon would do just fine for the same effect.
https://www.amazon.com/gp/product/B01MXJ83G4/?tag=gtplanet-20
I'd try this before mucking up you LFE settings on your home theater system.
And Yes the PS4 will run duel audio output , one through HDMI and one through optical output.