my buddy has the factory cd changer in his prelude and its hooked up through the stock cd player, so i would say its a custom fitted boost controller or equalizer like someone said above
It looks like a controller for a cheapo FM-modulated CD Changer.....
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Mobile Electronics Guru
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95' Si with JDM H22A/P13 ECU & JDM Climate Control
04' Volvo S60-R (Daily Driver)
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