Mr Zilch0md, I got my Stepdance + XP8000 + WI15 + AB05 + Powerstream connector all hooked up. Sound is phenomenal. I can even drive my HE-500 very well with it. I wasn't expecting that. I dare say the soundstage of this amp competes or exceeds my beloved V200 amp.
Problem: high-pitch squeal when XP8000 is discharging. Is that normal? I don't get the squeal if everything is hooked up and I also charge the XP8000 at the same time. I don't get the squeal if I use the USB output. I will try XP8000 tomorrow with the cMoyBB tomorrow. I just want to see if I get a bad XP8000 or it is normal when a 15V device is hooked up. When I received it today I have the sneaky suspicion that somebody returned it as there were fingerprints on it and you just get the feeling it is a returned unit when the packaging just doesn't look need inside. Plus the XP8000 box had some rough looking corners.
That's bittersweet news - sounds great, when it's not squealing. Ouch!
If you have a voltmeter, you might try checking the voltage coming out of the XP8000's blue 19V jack, using one of the cables that's made for that jack - not the WI15. I suspect that the squealing is coming from the WI15 only due to insufficient voltage being fed into it. When you plug the XP8000 into its brick charger, the squeal goes away, because the input voltage seen by the WI15 only then meets spec (something around 19V). That's my hunch, anyway.
In short, if you're not getting at least 18V out of the blue jack when the XP8000 is fully charged but disconnected from AC, it's a bad XP8000 and you should return it. Try comparing that "blue" voltage with and without the AC adapter - they should be nearly the same when the XP8000 is fully charged.
Warning: Be careful when sticking your voltmeter's probes into the barrel connector - don't short the outside of the barrel to the center conductor, or you might start squealing.
Edited by zilch0md - 3/1/12 at 9:47pm