I can try adding the lpad, thanks. I'm running out of other parts to swap in and play around with.
I do have parts coming next week to add a passive low-pass hi-pass at 800hz. With the current network in bi-amp I have the hi-pass attenuator turned up all the way, so it looks like the level should be pretty close as is.
The pair sounds really good. I'll have to listen a little more and offer a better report.