xlr splitter?

Does anyone have a solution, if I have only a single preamp xlr output and want to passively biwire into a 4 channel amp?

I want to keep xlr out to all 4 channels to make sure the amp gain is the same. The reason for trying this route is I have biwirable speakers.

I don't want to mix rca and xlr or the gain will be screwed up.

Any ideas?