Suhr Modern Wiring

I used to have a Suhr Modern HH configuration with Suhr Aldrich pickups wired as follows:

Pos 1 - Bridge HB
Pos 2 - Bridge HB split
Pos 3 - Both HBs
Pos 4 - Neck HB split
Pos 5 - Neck HB

My question is the split sounds - they were the best i've ever had from HBs and there was virtually zero volume drop vs the full HB sound.

Does anyone know how Suhr do their wiring, or have a schematic ?

Thanks

I haven't seen a diagram, but I would suspect they're using resistors for partial splits if the volume drop was so little...