My thoughts on the Blackwood after listening to it for two weeks:
I've done quite a lot of listening now, and I'd say that, for me, the Blackwood is BETTER than the Vibro in EVERY way! I am happily surprised!
Let me count the ways:
1.) Extended highs, but not overly bright.
2,) Noticeably wider sound stage.
3.) Instrument separation in complex passages very MUCH better.
4.) No upper bass hump muddying the midrange. Yay!
5.) Deeper low end... tighter and very smooth.
6.) Very smooth overall, yet exciting and dynamic when the music demands.
7.) Even these Alpha Pads are more comfortable for me, having a slightly larger opening than my older ones.
So with traditional audiophile reserve, I'll say... I may like them! LOL (BTW: I don't agree with most of the Blackwood nitpickers on head-fi.)
I am driving the Blackwood from the speaker terminals of the Parasound Zamp3; using the Asgard 2 as a pre-amp; my signal source is a Parasound Zcd player.
IMHO, Zach has done an INCREDIBLE job with these!