Anybody biamp Allison 4s?

Great idea! I'll do it. Thanks!

Jjrenman, Very simplistically, isn't the fact that there are jumpers proof that low and high ends are separate? Would just testing for continuity between both sets of posts with a voltmeter not be simpler and equally informative? Is this so or is there a more complicated aspect that you are alluding to that I am not getting?

Thank you for all your trouble, JJrenman. My repair tech/guru (Larry at Approved Audio, Litchfield, CT - I mention his name as he is so impressive - both in terms of personal integrity and the quality of work he does). After initially telling me that he didnt think it would work, (I think based on the fact that the original Allison 4s had one set of binding posts) he apparently called all over the country on his own dime, off hours, to find out the nature of the crossover, and called me back to say he had found someone who had successfully bi-amped Allison 4s and told me to go ahead! This, obviously, on the newer 4s with 2 sets of posts. So, thank you all - this is a terrific forum with helpful people, exemplified by you, and I would like to give a plug to Approved Audio, too (He has repaired my ss amps, tube amps, 3 tuners and CD players flawlessly over the past many years)