Getting hiss in all speakers

[Italia30]

Just installed Kicker amp ZX650, Polk Audio 6x9, 6 1/2 in doors, and tweeters in front with an Alpine CDE-102 receiver and Alpine ERA-G320 eq in a 2008 Altima. Getting a hiss from all speakers,seems to sound louder from the tweeters, could it be the EQ??...anyone familiar with the ERA-G320?

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[Chrispy 10+ year member]

Sounds like Engine/Alternator noise.

 

[boogeyman 10+ year member]

try lowering your gains