Preserving zero feedback

[dbphd]

Would a passive high-pass filter between a preamp and amp preserve zero feedback, e.g., a fully balanced Marchand passive high-pass filter between an Ayre KX-5/20 and VX-5/20? Obviously the balanced cables that run between the preamp and amp preserve zero feedback.

I was up until 6 this morning reading about the virtues of Ayre's zero feedback design and reviews of the VX-5/20. I'd like to high-pass my KEF Ref 1s at 80 Hz, but not at the expense of the Ayre sound I so enjoy.