In car stereos, the “DIN” marker indicates the dimensions of the in-dash stereo component, also referred to as the “head” unit. DIN stands for Duetch Industri Normen in German. Germans started using this to standardise radio’s in cars from the 1980’s. There are two types of DIN to choose from:
a) Single DIN: Refers to size 2 inches to 8 inches of opening in cars to fit radios in them. This is the norm of older cars.
b) Double DIN: Retains the same width size of single DIN which 8 inches but has increased its height by 2 inches. That means their dimension is 4” * 2”.
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