Did you carefully read this statement,
Use a tube amp on the mids and top end and a solidstate amp on the woofers.Or maybe a small wattage class a solid state on the mids and tweeters and a more powerful solid state amp on the woofers.Or any other crazy combo you could ever think of.
It's using diff. amps that have totally diff. sound characteristics that don't match up in the overall sound of a given speaker.
If both of your amps have volume controls they are probably about the same in sound maybe diff. pwr output.
I don't have the need to biamp but like I stated I do biwire from one single stereo amp or mono amps.
What amps do you have?
Kenny.