external speaker pinout PM1500

[firebug24]

Hello all
I'm looking for info regarding the pinout for an external speaker on a PM1500 !!
any help appreciated
steve w

[Jim202]

Hello all
I'm looking for info regarding the pinout for an external speaker on a PM1500 !!
any help appreciated
steve w

Maybe I am missing something in the question here. The PM1500 does use an external speaker off of the control head now. The control head does not have a built in speaker. There should be a small white Molex connector coming out of the control head accessory connector that the speaker gets connected to.

If your talking about adding a second speaker, that is a whole different question. There is a DB25 connector on the radio itself. Pin 24 and 25 are the speaker connections. Do not ground either pin as you will damage the audio output amp.

Jim

[firebug24]

Thanks for the info

Yeah, I'm looking to add a 2nd external speaker for a fire engine at the pump panel. Pins 24 & 25 which is + & - ???
steve w

[KG4INW]

They're not polarized so it doesn't matter which speaker lead you connect to which pin, so long as it's 24 and 25.