[QUESTION] How to change the radio distance via script

[th3-sh0w3r]

QUESTION:

As you can see in the title, I want to know, how to change the radio speak distance via script/sqf.
I want that the radio goes over the whole map, without changing any config related files.

I mean the distance from channel to channel, not the direct voice.

I tried that already, but the range only got smaller:
TF_speakerDistance = 1000; player setVariable ["tf_receivingDistanceMultiplicator", 100]; player setVariable ["tf_sendingDistanceMultiplicator", 100];