We're having trouble getting a new paging setup to work. We have a G3R R9. Program ch paging loudspeaker put in Aux trunk port and TAC code. We run from this port with copper over to the amp of the speaker. The system works but we gt real bad feedback. Something also shorts the paging system because everytime we plug in it stays on all the time even when your paging or not paging. We're going to try to install a Lucent 909 Universal Coupler but have no instructins. Can anyone help?