Never Enough Bass

Can't he ground it straight to the battery back there

This adapter shouldn't cause that high of resistance should it

I measured right at the amp

U want it as close to 0 as possible dmm positive to ground and ground to positive battery

Mine is screwed into plastic I found what's wrong with mine 1 of my grounds is 75 ohms lol

Yea it didn't do it with my old amp I just changed amps about 2 weeks ago and added the second battery now it does it no clue why I don't have much time to mess with it so it's going slow to find out why

Doesn't have to be pretty to work

I'm kinda going thru the same thing my subs thump a little when the amp turns on and off

Did u try grounding the high amp straight to the battery

Like @Dafaselessaid add some grounds pretty much process of elimination at this point

What kind of rca's do u have

Yea find somewhere else to ground the head unit to

Or bad rca's

Ground your head unit better that's usually where it comes from

The block distributes the power where it needs to go