Knowledge Base
Answers to Your Questions about Radio and Wireless Voice Communications

Motorola 2 Pin Wiring Data

01 November 2015

Wildtalk Earpieces with this plug end with the part number -M

This wiring plan is for Motorola radios only. It does not necessarily apply to all the other makes of radios which have copied the Motorola plug or even copy the Motorola wiring scheme.


2.5mm Pin (11mm long)

(NB this is not a standard 2.5mm plug. Its shape differs)

Ground for Mic only (not for speaker)

Mic in Series with PTT switch. In some later models the PTT can be left closed and the radio will work in VOX mode.


3.5mm Pin (14mm long)

Speaker +
Speaker Output +ve

Speaker -
Speaker Output -Ve

In many later models the radio uses a Bridge Tied Load amplifier so it is important neither Speaker wire is connected directly to the radio Ground or Mic ground otherwise the audio amplifier may be destroyed.


Radio Models
CP040 , CP88 , CP100 , CP150 , CP200 , CT150 , CT250 , CT450 , CT450LS , GP68 , GP88 , GP88S , GP300 , GP308 , GP350 , GP2000 , GTI , GTX , P10 , P040 , P080 , P110 , P1225 , P200 , SP10 , SP21 , SP50 , LTS2000 , XTN446 , XTN500 , XTN600 , CIS446 , HANDIECOM , HANDIEPRO , DTR2400.

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Use this data at your own risk. Wildtalk accepts no liability for any accidents or losses caused by use of this data.

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