I know GR had some relationship with AV123 which also sold the Onix branded speaker. I have a pair of the Ref. One monitors. A decent speaker IMO. Someone actually gave me them and have to say sound much better than expected. Seeming stout cabinet, Vifa Ring radiator tweeter and an Atohm 5" mid. (don't know much about this French company's products) So wondering having had some sort of relationship of you would have any data on the x-over component values. I know I could open up and probably get the numbers of the caps and maybe resister, but I don't think they stamp inductors. Of course I suppose I could just send you the board.
Which brings up another subject, What do you charge to evaluate the board?
Sorry if this topic has been covered. I've been away from audio and this forum for many years now. Life it seems just got in the way.