First you won't damage the Kone but it is a "guitar" speaker so the frequency range is geared for that particular instrument.
I don't understand your connection. If you have a Profiler and a Kabinet then why not hook the Kabinet to the Profiler as it was made to do. You can hook up the Main Outs into your Focusrite you just won't be able to do monitoring of the DAW signal with USB headphones until you render the DAW project to a wav file and listen back using the built-in interface of the computer. If you can't afford studio monitors right now then the next best thing is to get studio headphones to hook up to the Focusrite - and this is a better option for some people anyway.
thanks for the reply, I normally use Stage straight into Kone however i'm purely speaking about recording when I use the DAW. I plan to get some monitors soon I was just wondering if my temporary workaround was gonna be a problem.