hifonics amp question. help me!!!

[illbmeubu 10+ year member]

ok.....so I have a hifoincs hifonics Bxi1606d. I asked a ques. about it earlier and got a good solution, but now I notice that when I turn the bass up the led hifonics sign dims pretty bad. the sub also doesn't sound as loud as if it struggling to be powered. the weird thing is that the headlights do not dim. I have a kinetik in the back. my guess is that the ground os not good. I can't change it now cause it raining pretty bad. if you think my assumption is correct let me know. if there may be another problem, let me know. thanks

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[AsianInvasian42 10+ year member]

check your connections

make sure that the power line is crimped well and has a good and clean contact point with the battery...make sure the ground has a good clean connection point as well

check it with a dmm