Yeah, it does have a very woody sound.
It sounds a bit like Danny Thompson in the Richard Thompson Band, here:
http://www.youtube.com/watch?v=zgXPGJx5pZ4 - which is what made me think it might be a URB.
So if I could ask... How does a URB player get such wah? I had an eminence a few years back and didn't get anything close to that.
Is it all in the hands? The bass?
I messed around with a thinline URB once, and while the setup was crap, I was getting wah like I've never experienced before...