I have, as a 2.1 and as L/C/R with my Denon. In both cases, it was to get smoother response due to less-than-ideal placement. Also, with the L/C/R setup, listening distance was nearly 6m so I wanted to squeeze a little extra volume.
You need some kind of external crossover as the 8C sub out is just a passthrough.
Thanks for the info
@tifune
A passthrough of what? if you have dsp'ed the 8c (internally, not externally) do you get the full range, undsp'ed signal that was sent into the dutch that was sent to the 8c?
Why wouldnt the xover on your sub be good enough (not saying you are implying its not, but just asking)
Did you apply a high pass filter to the 8c's or did you leave them full range and add a low pass to your sub? Or did you leave the sub full range too?
I have tried doing all of the above and due to my room modes, i am struggling to improve the sound. The rew plots look good after integration but the sound, does not seem to reflect what i see so i am going to redo it ... again.
Edit - after speaking to Dutch, the sub out is not just passthrough. It is affected by speaker gain and voicing.