When I connected the EAR Yoshino HP4 last weekend, the XLR outs where already on duty running in the STAX SRM-727II. That's probably more than well and done by now. I haven't listened at all to that chain during the process.
Happy Camper's and your posts spur me on to try the XLR outs for listening. I will do that.
Happy Camper spurred an other thought as well. The Lynx Hilo is very flexible in its signal routing. It's probably possible to connect the Hilo's XLR out to its XLR in, and then listen to the headphone out. Have any of you tried this yet?