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APX Users reporting low volume on APX 8500

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pwo0123

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Joined
Apr 15, 2007
Messages
11
Hello, I recently deployed about 100 APX 8500 radios with O5 heads. This was a replacement project from APX7500 with O5 head.

recently users have reported low volume coming from the 8500. During testing I noticed a slightly lower volume as well. I figured is was something to do with the “adaptive noise” features of the 8500. Users are reporting that they have to crank the volume knob to 85-90% to actually hear something. We use the standard Motorola Mobile speaker. Don’t have the part number but I can get it.

question is has anyone else noticed this? I’ve scanned both my 7500 code plug and 8500 code plug and haven't seen anything extremely different.
 

RFI-EMI-GUY

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Dec 22, 2013
Messages
5,260
Ca
Hello, I recently deployed about 100 APX 8500 radios with O5 heads. This was a replacement project from APX7500 with O5 head.

recently users have reported low volume coming from the 8500. During testing I noticed a slightly lower volume as well. I figured is was something to do with the “adaptive noise” features of the 8500. Users are reporting that they have to crank the volume knob to 85-90% to actually hear something. We use the standard Motorola Mobile speaker. Don’t have the part number but I can get it.

question is has anyone else noticed this? I’ve scanned both my 7500 code plug and 8500 code plug and haven't seen anything extremely different.
N you compare using an analog channel?
 

KE4SZT

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Joined
Dec 19, 2002
Messages
22
Location
Marion, SC
The latest firmware, R21.03.00, was supposed to fix that issue. It was a known issue and Mot had sent out a bulletin with the exact problem you are describing. The volume reduction issue was with units running firmware R20.61.00.
 

Tech21

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Oct 16, 2018
Messages
282
Upgrade to the newest firmware.

One test you can do is add a conventional channel and test audio levels with a service monitor.
 

NVAGVUP

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Feed Provider
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Jun 13, 2007
Messages
94
When looking at your codeplugs, switch to Expert View (View>Codeplug View). Then compare the TX and RX audio settings between 7500's and 8500's. (AGC, Gain, etc) It is possible prior programmer adjusted 7500's from default.
 
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