does anyone use subwoofers in their setup?

[Antoine]

So I set the delay for the subwoofer preout as mentioned above and from an sw integration perspective, it sounds like a step in the right direction. I have now been experimenting with the phase settings (my sw has four, 0,90,180,270) and percieve 90 to be the one which gives me the best results, but what exactly is phase doing? I read the sounddoctor article, but still don't get it ...

Can someone enlighten me?

You need to apply the delay to the fronts, not the sub (assuming your sub is near to your fronts/mains). It's the sub and any DSP in and/or in front of it that "lags".

A stepless phase control really would be best. During setup in my system I've noticed there's a real small "window" where things are optimal, just the tiniest change of the dial would again result in an out of phase setting again. (it's a bit like tuning to a radio station)

If there's no stepless phase control available I'd rely on the frequency amplitude measurements of a tool like REW (sounddoctor also mentions this). There you would look for the highest amplitude at the crossover frequency with the different subwoofer phase options to determine the phase setting nearest to optimal.

Devialet implementing a real time setting of the delay option so that we can change while listening, or even better doing real time measuring would indeed be very useful.