By coincidence, I just ran a bastardized variation on the other Faulkner array last night- the parallel figure-8 setup which more people associate with him. I ran it on-stage as an extra pair of mics as an experiment for a regular jazz trio gig without a PA. It's electric guitar(left), unamplified drum kit(center) and amplified acoustic bass(right). The orientation and directive radiation of the guitar amp often makes the guitar louder than the drums and the bass. To help balance things I shift my setup slightly towards the bass side, and then typically rotate my recording angle to point left across the drum kit (mics on the snare side) towards the guitar to help balance. I setup my main rig that way as usual, then setup the parallel figure 8s not angled, but pointing straight ahead at the bass and snare of the drum kit (mics spaced 12”- a bit more than the Faulkner setup). The idea being to place the guitar over in a less sensitive region of the figure 8 patterns so that it had less level, yet not all the way over in the nulls. I actually angled the left fig-8 out ever so slightly, maybe 5-10 degrees, partly to make sure that if the patterns weren’t perfectly parallel I’d err towards more guitar level in the left channel rather than risk generate conflicting time and level differences if the patterns crossed slightly, and partly to add just a touch of level difference to the close A-B setup.
A while ago in another thread I suggested trying this as a unique setup for someone trying to limit the pickup of a source off to one side as much as possible, and figured this was as good time to give that a try, not with the guitar amp all the way to the side in the shared figure-8 nulls but over enough to limit its level in both mics.
On a quick listen when I got home, it worked pretty well. Compared to the 8-1/2” spaced ~80-85 degree inclusive angled cardioids I had pointing across the kit, it was more like a moderately spaced omni recording image-wise, which would be expected with the mics nearly parallel, and the guitar was lower in level than the bass and drums just as I’d hoped.