Okay... mini-review coming up!
I picked it up with a zombie (beyond dead) set of some pretty heavy gauge strings. 120 at least. It didn't tell me anything about its tone, but it felt pretty good, had one of those D-tuners, and was a Carvin. I figured it couldn't suck. My old guitar instructor from the days of lore always raved about everything Carvin: Great prices, exceptional quality, the excess of customization and personalization.
Some physical attributes: It sits very comfortably on me. No neck dive. It hangs in just the right spot. The neck is very comfortable. It's certainly thinner than I'm used to, being a raging P-Bassaholic. I haven't had enough time to really say with certainty, but it feels faster than my P Bass.
And onto tone: Wow! I put on a lightly used set of Roto 66 (.105) from my P Bass onto it. Wow! It has a bright, punchy, defined tone. It had character. It was everything my P Bass was missing.
Both pickups on and a pick and it was like a quote from Rancid's ...And Out Come the Wolves album. The neck pickup sounds amazing solo'd, which I've NEVER even contemplated on a Jazz before. (I saw that thread about it and thought, what the hell!) I haven't given it a good run on the bridge yet, but I think I'll be equally excited about that. Finger style was comfortable and quick. I feel more at home doing more complicated playing on the Carvin. I even like the feel for slap playing, which is a Christmas miracle. (No jokes there, I promise!

) I've sold basses because they don't feel comfortable slapping. This one simply feels natural for everything.
I emailed Carvin for additional specs on my exact bass. I'm pretty sure it's got the two single coils, D tuner, black hardware, and no extra options beyond those.