Hi Steve.
I set up the sub in the manner suggested by REL which is using the Neutrik connector plugged into the high unbalanced imput. I have a second, matching sub that is undergoing warranty service. Sumiko has suggested when they get my second sub operating properly that I use the balanced high inputs on both subs as my CD player, pre amp, and amp are all BAT produts with balanced interconnects.
Using the Neutrik connector, I can see how to use the unbalanced (and balanced) high imputs on the sub, but I don't know how to use xlr outputs from the preamp to the sub as you describe. The sub has no xlr imputs...only Neutrik high imputs (balanced and unbalanced) and RCA low imput connectors. Can you clarify for me? I'd like to try your suggestion.
Thanks. Jim