I just got playing it and first impression is it sounds a lot like a Fender Jazz bass, and unlike any of my other Gibson basses.
Each pickup separately sound pretty articulate warm, clean and clear, but both pickups together give you a nice hot snarling sound. It does not have that slightly fuzzy or blurry Mahogany sound of my other passive Gibsons. Again slightly Jazz sounding. Sustain & harmonics are very good. The balance is not to bad due to the Kahler I assume. Overall it seems light, like around 8 pounds?
The big D adds another element as expected from a compressed nasal tone sucking sound, a woofy almost mudbucker, to a hot raspy one and several in-between.
I will try to post some clips in the next week.