I haven´t heard about them, but I have done a bit of research on lo imp. pups this summer.
I have collected everything I could find in writing about them, trying to put Les´ideas in perspective.
As mentioned in an earlier thread, I bought four supposed to be bass recording pickups on ebay.
They were guitar pups, bot NOS from an ex gibson employee and two of them was in working order.
I fitted one (above the strings) on an eb-3, directly to the amp with a standard mic to line trafo, and
it sounds really good. Mud for neck, mini for bridge - and lo imp. in between - what a great setup!
Anyway, I started diggin´out the coils of one of the open pups. It´s a mess with the epoxy, but i just have to examine the coils.
I have been working on prototypes for eb-3 mini humbuckers for a while, (I´ll post when something turns out good) both sidewinders and stacked. I have a seriously vast stock of thick magnet wire (inherited from the local speaker factory) so it makes sense to dig into low impedance land. I still need to listen more to the bass pickups, though. I love to experiment, as I have one or two gibson fetishes myself.
Most pickup stuff I do is to repair or rewind single coils for guitar players who wants them extreme hot, and later want to make them sound vintage...
Not sure how many would be interested in low impedance pickups for bass, though. Or mini sidewinders for that matter.
I try to focus on making amps, but enjoy winding a lot.
Is the ballurio low impedance pup both bass and guitar sizes?