[quote user="sex"]if i connect as u said with the y cables will i not be sending the right chanel to one amp and the left to the other ?if i then biamp by driving high frecuency with one amp and mid to low frecuency with the other i will be sending some of the right chanel sound to the left and some of the left tho the right? ???[/quote]
I think at this point I give up...
Oh, I think I can't. No, using the Y cables you can use one amp to drive left HF and LF, and the other to drive right HF and LF, or one to drive left and right HF, and the other to drive right and left LF.
I'd use the latter option, but if the power amps you're using have 'daisy-chain' outputs, you can connect to the HF amp, and then use standard interconnects to feed signal through to the LF amp, with no need for the Y-cables.