Using 2 Amps with Audible Illusions Modulus 3A Preamp

I want to have 1 amp driving the woofers and the other driving the midrange and tweeters. Can I use a y adaptor coming out of the main set of outputs, or should I use the second set of outputs, which I believe has an additional cap in the circuit. Unlike some out there, I have never had my AI unit burning through tubes. ( I have only used the specifically recommended Russian ones or Tungsram, over the years)