Ah OK. Well, they might be a bit heftier than the rest of the options but tbh not much worse than, say, 4-pin XLR when it comes to wiring up and handling. Once you connect them they stay there, right? ;-) I use HartAudio's cables and interconnects. Recently ordered the dual 3-pin XLR interconnect just out of curiosity and they seem to help open up the sound(stage), at least on my system. I haven't A/B'ed them but suddenly all my headphones sound more open and wide without losing detail. My HD660S now sounds better that they ever did before, and surprisingly open. I might be wrong and it all may be placebo effect, but what I can say with absolute confidence is that the volume knob on my Pro iCAN Sig. very rarely needs to go further than 9 o'clock these days. I did some research but couldn't find anything useful to understand what may be going on in terms of power delivery, etc. as compared to regular 4-pin XLR connections.