HPF on HU?

[pdtran 10+ year member]

i have a 7800MP and i'm wondering...since u can adjust the highpass filter on the head unit do u just not touch the amp's high pass filter or the other way around. does it matter, should i just do the easiest one to set? should i do both at the same settings?

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[adam71 5,000+ posts]

i have a 7800MP and i'm wondering...since u can adjust the highpass filter on the head unit do u just not touch the amp's high pass filter or the other way around. does it matter, should i just do the easiest one to set? should i do both at the same settings?

Correct. Leave the amp's crossover set to ALL PASS or defeat it if that is an option.