APX 6500 audio issue

[kennedy-r]

Ok here's an odd one I can't figure out thus far. I have a truck with 2 apx 6500 uhf mobiles. The radios both randomly stop playing audio over the external speakers but the radio still can transmit and receive through the handset speaker. Also audio still comes through the control head speakers. The speakers in question are wired to the rear connector. Its BOTH radios at the same time doing this both on non amplified moto speakers (2 sets on each radio) from the rear connector. When the radio is power cycled it all comes back like nothing ever happened. connections all seem solid and correct and nothing between the radios is common not even power at this point,

 

[Tech21]

Not really an odd one, the problem is self-induced...

Are these dash mount radios or remote mount radios?

If you disconnect the speakers, does the problem occur?

Since you say you are feeding two external speakers from each radio, that means somebody cut wires and spliced the second speaker in. I would start there. The standard Motorola accessory plug is only designed to support one external 3.2 Ohm speaker.

 

[kennedy-r]

They are remote mounted and I’m going to try that next and just use the 02 head speakers and see what happens. We have always had two off the rear connector across the whole fleet with no issues. But it’s a place to start for sure and an easy thing to test.

 

[Tech21]

Is one speaker connected to the control head and one speaker connected the remote mount or did somebody splice the second speaker in?

 

[kennedy-r]

Just took a closer look and two radios two remote heads. Two speakers connected to each control head. I’m going to clip on speaker from each to see if that makes a change

 

[kennedy-r]

*one speaker from each

 

[Tech21]

It should, you can also plug in one speaker at the control head and one speaker at the transceiver accessory plug. It's just not a good idea to splice in extra speakers because now, you are just introducing an avoidable failure point. You simply may just have a bad splice or somebody got the positive and negative wires flipped. Normally won't cause an issue but sometimes it does.

When you splice in a speaker, you have to be sure that positive goes to positive and negative goes to negative and that the wires don't get crossed. The good thing about remote mounts is you can run two speakers without having to splice anything.

 

[kennedy-r]

Thanks I will let you know. The thing that makes me rule out one bad splice is that its two seperate radios, separate speakers.