Car audio noise reduction Color:As shown Built-in 300mA battery for longer
$17.95
Description
Built-in 300mA battery for longer battery life
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Car audio noise reduction Color:As shown Built-in 300mA battery for longerThe role of car audio high to low 1. High to low: Used to convert the high level audio voltage output by the speaker into a low level audio signal for input by other power amplifiers. 2. Common "high to low" converters are roughly divided into passive and active types. Passive high to low does not need to be connected to the battery. The high signal has recently gone out, and the middle is a few resistors. So to be precise, passive high to low should
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