Carvin BK5 Bass
This instrument was built from a kitset from Carvin, hence the lack of a brand name decal. But it is effectively a Carvin B5.
I don't use the active electronics much, for some reason I get better results with passive plus outboard amp modellers.
Here's an mp3 of me playing a riff from Porcupine Tree and demonstrating the different sounds you get from blending the pickups and changing the coil tap on the HB2.