yep sure have. I even disconnected the spkrs from the patio, both pair, connected them directly to zone two and they played. Also, I bypassed the switch by taking the skpr wire that inputs to the switch and twisted the wire onto one pair, and they would not play. Now if I hook up my old 2 channel to the switch, both pair will play. go figure. makes no sense to me whatsoever. Sure sounds like something wrong with the unit, but the repair said everything works...