Docash777,
I had the 402 and used two cable sets from the 8.ohm-tap to connect them to my Shahinian Diapason speaker, which has one binding post on the subwoofer, and another one on the module for the middle and high frequencies. Both cables, and loads, add up to 6 ohm, which is fine
It is IN NO CASE advisable to use two different taps, however, as you will lose half the power, and stress the amp, as I remember being told by Chuck Hinton from McIntosh years back.
Regards, Florian Hassel