How to connect Powernode to KC62

I think you just need to run the cable from the Powernode's Sub Out to the LFE input on the sub (the white/left input).  There is also a switch on the sub that you set to LFE.

In the BluOS app, turn on the Sub in the Audio settings.  The sub output is always on, but turning on the Sub button will engage the crossover settings.  Play around with different settings (80Hz is a pretty high crossover point).  As an aside, in the system where I have a Powernode, I actually run the speakers full range (Sub switched off, but still sending signal to the sub).  I think it sounds better in that room, even though it doesn't measure the flattest.

THank you so much for your help.

What speakers are you using with your Powernode? My current speakers are known to have somewhat weak bass,hence I was planning to feed the low range to sub onoy. 

I  don't know what a Powernode is, but KEF recommends 70 HP and 45 LP for the KC62 used with the LS50 W2.  I use a pair of KC62s with a LS50 W2, and I'm always amazed at how well pipe organ pedal notes are portrayed.  

This week I'll be replacing the excellent LS50 W2 with what I hope is a superb LS60.