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Can any one explane how to adjust a Rockford Fosgate PBR300x2 Amp had it installed with Rockford Fosgate speakers and decided to change and go with J+M rockers and keep the amp
 

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Can any one explane how to adjust a Rockford Fosgate PBR300x2 Amp had it installed with Rockford Fosgate speakers and decided to change and go with J+M rockers and keep the amp
So the directions say something like this. Turn the stereo up to approx. 3/4 volume and set the gain knob until the speakers begin to distort. This is the ghetto way, there is a spectrometor or something a stereo shop could use. Ocsilating scope something. You should be able to set the gain with just a tiny screw driver.
 
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