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Discussion Starter #1
So I got an alpine 7878 hu from work of the old radio shelf bc it had a bad cd drive in it. I had the repair guy put one in it ot of a different radio that was also on the shelf from a different problem. It works great but I can't figure out how to get to ther crossover setting or anything. It's set for 2 way + sub. Anyone talk me through it

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With the power off, set the switch on the side of the unit to 3WAY. Then you press and hold the DIVIDER button to adjust the crossover and time correction.
 

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Even if I'm using just using it like a basic hu. I've got the front and reat speakers running off hu power and just sub out to a cheap little sub

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Typically the full crossover adjustments only affect the RCA outputs on Alpine head units. I don't think it's different on the 7878. Download the manual.
 
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