wow thanks for the responses guys!
never even heard of the density hulk!
I should have given a more detailed description really. I am not fussed about losing the 'tonal charm' from the oc-2, I just mean that the reason I have held onto it no longer applies in my current setup- hence the search for a different sub.
To be honest, my home gear is embarrassingly poor. I play into a laptop- one usb midi input for mids/ highs in NI massive, one 1/4" analogue for subs. Splitting duties between midi/analogue in this way seems to be quite effective, but its still very early days. The laptop is where I do the lowpassing/ highpassing (at around 30hz)/ compressing etc. in the Reaper DAW, so the octaver is the only (non-midi) pedal I use.
At the moment I just listen through headphones out of the external sound card. No gigs, no studio practices- I'm still trying to figure it all out. I know that without listening through decent cabs its all a bit academic. Still, even though I am using headphones, other subs, say, from Massive or produced tracks, sound better, thicker, more solid. And I am guessing its down to the waveform. Does this seem likely? Square waves aren't so great for thick subs, are they? And the oc-2 is kinda squarey, isn't it?
Assuming it is down to the waveform, does anyone know what sort of waveforms the octavers mentioned above generate, or how they are generated? Or maybe its just a case of trial and error...
Thanks again everyone!