The alternative 2X setting I refer to use the white and black leads attached to the speaker binding posts and the blue and yellow leads attached to the amplifer posts. This configuration brought back the "magic" OTL sound, but resulted in a small loss on the bass side of things. If I only had one pair of ZEROs or did not have bi-wire capability I would have easily, and happily settled for this setup and accepted the loss of bass output for the improvements gained elsewhere.
Not entirely content to leave it at that however, I contacted Paul Speltz and he suggested I try a second pair in standard 2X mode on the woofers and like I said before, the results were phenomenal. The best of both worlds and then some.
I don't know why Paul doesn't promote this setup more at his website. I don't know if my results would be achieved on other speaker models, but on N.E.A.R. 50Me II loudspeakers the gains were absolutely awesome.
One method I never tried, but would be curious to hear the results of, would be to bi-wire using just one pair of ZEROs.
On the N.E.A.R.s I would use the configuration described above on the high frequencies and another alternative 2X such as brown/green or gray/green on the low frequencies. If anyone tries this, you might as well try the reverse as well, brown/green or gray/green on the highs and white/black on the lows, to see if there are any gains.
Refer to
Group 2 Configurations at the ZeroImpedance.com website to see a diagram of the alternative configuration options I refer to.
I know that this bi-wire with one pair of ZEROs is an option, but for safety, please check with Paul Speltz before trying.