SPECIAL NOTE WHEN USING EXTERNAL SPEAKER WITH SOME RADIO & INTERCOM COMBINATIONS
The M1 and RDM-DB radios feature a speaker modification which allows for use of the External Speaker without additional adapters or cables.
When using this external speaker connected to some older intercom and radio systems, please note the following. To make sure radio traffic is also heard in your headset or helmet kit, you must use both the CJ-SPK-DC and SPLITTER-MONO-3.5. Together, these will disable the radio speaker while passing the signal to both the external speaker and into your intercom.
