Hey guys! So long story short, I was using my TK-730 for the PA function and it was connected to the same speaker as my siren. The next time I went to use the siren, it fed way too many amps back into the wires connected to the speaker and blew the audio amp on the radio. After I got that fixed, I was wondering if it would be possible to prevent the electricity from moving from the siren box into the radio and just continue to the siren speaker, but if i wanted to use the radio PA system then I could. Like a one way circuit. Thanks in advanced.