Hi Jeff,
In response to your question... All of the above! The heavy, dense woods, the super long scale, and the solid construction. All the ingredients for amazing sustain and brilliantly clear sound. The low 'B' is as tight and punchy as anything you can imagine.
Obviously, every Alembic sounds great, but the Dark Prince is clearly a step (or several steps) above the rest for true natural sound quality. It is also quite easy to play. The neck, although super long, is slim and very fast.
The beauty of a custom Alembic is that you can ask for something that's really beyond everything else, and then watch it come to life.
Cheers,
Rami