First bi-amp go around

Hello wturkey, You’ll likely have quite a few responses explaining about matching input impedance as well as the differences in type/design of amps...cabling used... individual differences in driver efficiencies and an array of other variables; all of which are important factors to be sorted out. But: you’ve already experienced the most profound effect of doing it ( and you’ll 
be able to refine it all even more when you address these other factors more closely) : the biggest improvement imho is the 
A M A Z I N G    S E P A R A T I O N. of the instruments... it’s really a kick.
I’ll watch for further responses... it’s a cool trick if you can pull it all together. Ideally of course you should have identical amps... and if they’re all mono blocs... the individual localization of stage is incredible...
Have fun.. just be extra careful stepping through the additional maze of cabling!!!

Forgot to add the other factor making the whole scene [if you can pull it all together] even more addictive:
the sense of effortless power ... the feeling that no transients /  ‘peaks’ or demands are ever any ‘effort’... it’s just instantly reactive... instantly available...
You will actually seek out the most demanding material you own and [ if your speakers can handle the challenge] you’re going to say “ WOW”! often!

Definitely agree with the effortless power statement. Peter gabrial new blood was being played. I was listening while doing other things. There were many moments while listening to this album, for the who knows how many time, I thought "what was that?" Upon first investigation, it seemed the ps audio bhk preamp was unable to do two preouts. After actually reading the owners manual, it IS designed to handle two pre outs. The only real hangup setting this experiment up was the xlr to rca patch cable needed as both of these types of amps are single ended.