here is a puzzler. my system includes the following setup. Arcam a80 integrated biamped with arcam p80 power-amp. The manual suggests this. Speakers are aerial 6 with biwiring capability. these speakers are power sucking pigs, but sound great at strong volume. the maker says they are 4-6 ohms, but i suspect on big transients, they dip lower. this becomes relevant in a minute. i have been using nordost blue heaven, 4 metre biwired on both ends with no problems whatsoever from day one. i have used the p80 to drive the bass units and the a80 to drive the mid/treble. i can turn the volume to full (only for test purposes) without any problem. here is the problem.
i bought a set of 3 metre red dawn version 2 and received it yesterday. it is terminated identically to my blue heaven. i wired everything up in the usual manner. i started at low volume and things sounded good, eventually, at about 75% power, the protection circuit kicked in on the bass channel. lowering volume and waiting restored power. i tried many combinations including reversing polarity, switching the amp assignments, standard bi-wiring with only the integrated amp. these all caused the same results. the only thing that worked was to use only 1 of the leads in the integrated run to the speaker with the speaker connections bridged as if i was only using one standard wire. this permitted full volume.
so, i was hoping one of you gurus would have some thoughts for me. by the way, the only numbers of any use i have for the amp are output impedence <50 ohms and nominal output level 700mv. no such specs on the speakers, just the 4-6 ohms of which i believe is closer to 2 ohms at some transient peaks.
thanks in advance for any assistance you can render.