Couple of notes now that I've had the Explorer running for a couple of days.
* No hiss or hum whatsoever with my JH16s.
* The Explorer plays in integer mode in Audirvana, which is cool
* No problems playing my growing collection of high-res m4a files sourced from HDtracks. I'm finally satisfied with the availability of high-res music that suits my tastes.
* The only issue is that I can't get albums to loop multiples times in iTunes/Audirvana. Not sure why, but I can't blame the Explorer for this.
* Looking forward to the new Thom Yorke album next week... Should be a good match for this system.
* Overall, sound quality is all I could hope for in a compact portable system.