Alembic MXY56 (?) 5/6 string pickup set with 2 band pre-amp. 4 knob (volume, blend, bass, treble). There is no Q switch. Some string wear on the covers but they sound fantastic.
These pickups and preamp are shown below installed in my David King 6 string. The bass sounded great but I wanted something more versatile so one year at NAMM I let Carey Nordstrand take it back to his shop and custom fit it with a pair of his dual coils and a U-Retro preamp.
Current pricing on the new equivalent looks like $1200, asking $450 + shipping. http://www.alembic.com/prod/prices.html#ACTIVATORS