I don't know what you mean by a "cheater plug" I have a single (mono) sub out on the receiver cable, to the LFE connection on sub-1 with a y-connecter to sub-2 connected in the same configeration as sub-1.

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s