Here are the specs for the reducer and it says to use one for each accessory.


" This heavy duty reducer drops 12 volt to 6 volt. When you have converted to a 12 volt system and still use a 6 volt radio or original heater. Protects six volt accessories from higher 12 volt systems. Warning: use only one EL135 for each accessory!!! Each. 3.3 amp / 50 watts 1 ohm "

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1948 Chevy 2-Ton