I purchased a s500 Talk-Back speaker. There was not paperwork included with the speaker. Which wire is the PA. I am thinking it is the small red wire. Also: in order to use the Blue Tooth function of the 29ltd BT must I have a bluetooth microphone. It appears, from the literature, that it is not necessarily required. The radio was very recently purchased and has not yet been installed.

because when you switch to PA it is because you are on the outside of your vehicle.When another party calls you ,you can hear them and then go to your vehicle flip it to cb and talk to your party.

All the 8 ohm's means is that you need to use an 8 ohm speaker for optimum performance. That is what the radio is set up for. Most small PA speakers for auto etc, are 8 ohm's.

Are you following the user manual that came with the radio?
NB-ANL/CB/PA SWITCH: When the switch is in the NB/ANL position, the Noise Blanker (NB) and Automatic Noise Limiter (ANL) circuits are activated.
The Noise Blanker is very effective in eliminating repetitive impulse noise such as ignition interference. In the CB position, the PA function is disabled and the radio will transmit and receive on the speaker that is connected. In the PA position,
the radio acts as public address amplifier. Your voice will come out of the speaker that is plugged into the PA. SP. jack on the rear panel. The radio does not operate when you are in the PA mode.

When you plug a speaker into the ext. jack does it kill the radios internal speaker? It should until you unplug it; if not and you are following the about you may have a wiring issue with the jacks.

great radio but I own one and never again will I get one . To add talk back you must take off the top cover,solder a 33 ohm resistor across the pa and the external speaker outputs. If it doesn't work then try another resistor but this is the way to do it . If you want it on a variable then you attach two wires from each side of the resistor to a switch and you have it. I'm trying to get rid of mine but nobody wants to buy it.cheap.

Hi
From the owner's manual (link below) Page 5.
To wire the PA speaker, use the orange (+) and black (-) wires.

-Steve


http://www.uniden.com/pdf/SOLARA%20DSC-BKom.pdf

1. www.cbmonitor.cz/...manualy/Cobra/Cobra%2019%20Ultra%20III%20manual.pdf
   pdf.textfiles.com/manuals/.../Cobra_19%20Ultra-II%20CB%20Tranciever_Manual.pdf -
   
   User manual. www.cbtricks.com/radios/cobra/7_ultra/graphics/cobra_7ultra_sm.pdf
   
   usually, you connect up the PA,ans switch, it on and talk, it will not go unless selected. use the maual to help.

not true I have the same exact speaker Cobra high gear S500 has two wires one black one red the red I have no idea where it goes the black I plug into my external speaker port and my speaker works but I don't hear my talk back. when I plug the red wire into the PA Port nothing happens the speakers is dead. I have not yet found out where the red wire goes.

Go and google it as you can buy it on line ... how tough can it be the hook up speaker wires? The small speakers are front and back, left and right in pairs. red wire to red jack on back , black wire to black jack. big speaker goes to sub wolf. jack in back. Now get those wires and play your Christmas music. note jacks may be marked fr fl rr rl sub

Have you check your voltage regulator. 2 outer legs should read 13 volts middle 9 volt. Around and about.

The black wire goes in the external speaker and the red wire goes in the PA jack.