Opa 827 just arrived. Placebo or not they do seem to give more body to the HD700. Jambi (Tool) now sounds as good as I remembered.
Cool to see another user with the HD700 + X7 combo, I think I've seen like four others do that. It's how I primarily used mine, till I basically looked at my 10+ headphones and decided that the HD700 was the one I should pass along. Body was a strength with the HD700 already IMO, but the OPA 827 might be good with my AKG's that are naturally more "airy" than "full-bodied." I keep telling myself to buy some Tool.
Can I connect a PS4 to the soundblaster while a PC is connected and output both the PC and PS4s audio?
Yes, and the Mixer panel will allow you to adjust the mix of volume from each source. Once I was playing PS4 (very casual, grind-y game), listening to music on my phone, and Steam voice calling a friend all at once. The only thing is that a phone call takes over all audio, FYI, although that did make it easier to talk on the call
Btw, LucasCL from Creative Labs recently mentioned that the X7's control panel software is getting an update, separating headphone and speaker calibrations and a few other things of polish (yay!). Continued polishing effort is always appreciated.