XPR4550 RSN4002A speaker install

[Anderegg]

I am preparing to install this speaker on a mobile XPR4550. The radio in question has no rear accessory shorting plug, and is not set for ignition sense. My question is, will plugging this speaker into the rear port of the radio disable the internal speaker, or will I need to short some other set of pins on the accessory connector to accomplish this. The speaker kit is new and contains a butt load of those little silver pins.

The internal speaker at high volumes is horrible, just a vibrating muffled mess and has been driving me crazy for years!

Paul

 

[KG4INW]

Plugging an external speaker in has no affect on the internal one. To accomplish that, you'll need to carefully dismantle the control head and physically unplug the internal speaker.

 

[Anderegg]

I thought that might be the case...similar to the XTL1500 and APX O2 control heads. Thanks!

Paul

 

[N4KVE]

I use the external speaker, & yes, the internal speaker is still working too. But I'm told it's not harmful for the radio.

 

[mmckenna]

I use the external speaker, & yes, the internal speaker is still working too. But I'm told it's not harmful for the radio.

I played around with this on a few different radios…
The larger speakers, as expected, gave a bit more low end.
The smaller internal speakers seemed to have better high end, again, as expected.

I tried disconnecting the internal speakers to see what the audio quality was like. Hard to tell the difference in a moving vehicle. Keeping the internal speaker hooked up did add a bit to the high end, which did make the overall sound better.

Since doing that, I just leave them as is.

 

[Anderegg]

The issue I have is with the base transmitter. It is routed through a weird in house intercom system, so some mics are overmodulated, and others practically no audio. Leaving the volume up for the weak mics means the overmod stuff on the internal speaker at max volume is simply distorted vibrating muffled mess. I will test with both speakers left active before making a final decision.

I dont see any front face screws...how do I access the speaker jack for the internal?

Paul

 

[KG4INW]

The front panel is removed using the 6686119B01 removal tool. You could probably use a flat-head screwdriver but you're liable to tear up the plastic more easily. Then it's just a matter of unplugging the speaker.

 

[Anderegg]

Thanks for the part number, ordered one from Wiscomm for $8 shipped.

Paul