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Yes needs to be retuned. To do this turn knob and gain down all the way plug in and turn knob all the way up, then put multimeter on speaker output with sub disconected and adjust to desjred power level measuring voltage AC.
Sorry, there was a problem. Please try again later.Just plug in a will work with out adjusting the gain
Sorry, there was a problem. Please try again later.yes you will want to reset your gain with the bass knob turned all the way up
Sorry, there was a problem. Please try again later.I have a 300.1 and added this after i installed and tuned it. I noticed no difference, but tuned up my gains on head unit so I can add head room to music that was older and quieter than current higher bit tracks.
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