I just read a question about octavers for electric violin here. So here are my impressions and decision.

Some years ago I tried various octavers and was not satisfied - the octaved sound had nothing to do with the original, it was synth- like and dead and technically the sound was fluttering: the units didn't get glissandi (slides).

http://www.uli-boesking.de/rebo/
rebo@uli-boesking.de

Features:

• A two-piece electromagnetic humbucking pickup.

• Freely adjustable.

• Allows adjustment to the individuallities of the instrument like form of bridge and position of strings.

• Very low risk of feedbacks (means: sympathetic feedback like on electric guitar - absolutely no nasty piezo feedbacks).

My name is Uli Bösking. I have been freelance (electric) violinist, violist and violin teacher for 20 years, now I'm highschool teacher (music & spanish) in Bremen, Germany.

I'm still composing & performing:
http://www.uli-boesking.de/dosulises
and directing exceptional school projects for electric bowed strings:
http://www.uli-boesking.de/surfinbela/sound

Together with audio technician Manfred Reckmeyer (Bremen) I have developed an electromagnetic pickup system for violin, viola, cello & doublebass: