Hooking up Janis subwoofer

I am trying a Janis W1 subwoofer(larger one with a 15" driver)to be hooked up to my system. I am running monoblock amps and my preamp balanced. The X1 amp for the Janis sub has only RCA connectors, can you obtain balanced to RCA plugs, will that work, does anyone know if Janis can install balanced connectors on the X1? Or do I have to go back to RCA's? Has anyone tried this sub with planars? Thanks for your input.
I would be very interested in finding out if JANIS will install a balanced input connection. Right now I am running a splitter into mine to get better s/n, and I would rather run a balanced line. Could you please post what you find out?
HI, I owned 2 janis subs with 2 interphases,100w + 15 inch subs.hooked them up stereo with my acoustat 2+2 electrostatics.Unfortunately,the electrostatics were too fast for the sub.i phoned to john marovskis in new york.he was very helpful.