Bi-Amping with XLR

I understand there are some "Y" adapters for this, what kind of results have you had bi-amping with XLR and what do you recommend for the "Y" adapter? Or am I just as well of bi-wiring?
Any of the wire companies will make you up a balanced splitter. I was on the verge of doing this myself however I ended up with a preamp that has two sets of balanced outputs.


Paul :-)
XLR splitter: