Loud Humming after amp install

[Nathaniel Mathis]

I get a loud continuous hum from my woofer after installing aftermarket amp. Anyone else have this issue? I have a 2019 Bighorn.

 

[Brandon-w]

I had it until I ran a pre amp equalizer once installed that it went away.

 

[rule18]

Grounding issue?

 

[Nathaniel Mathis]

We grounded it right to the body in between the seats but I will have them check it again.

 

[Brandon-w]

I remember reading somewhere if Ur tapping amp signal it's 2 ohm so you need a filter or pre amp because most amps don't like amplified power as signal.

 

[Graygoose]

Sounds like a ground or RCA

 

[Nathaniel Mathis]

We are going to look into it again this afternoon and will check the RCAs.

 

[DraKhen99]

If you ran separate power/RCAs to it, then make sure the RCAs don't run on the same side as power. RCAs can pick up a hum from the power wires if they're too close. I had a Mustang that did something similar - it picked up the turn signal wires running to the rear of the car, and when I put on my turn signals, the sub went thump-thump-thump. I moved the RCAs to the other side of the car and it went away.

-John

 

[Nathaniel Mathis]

Thanks for your input. I will post up what happened and the fix in a couple hours.

 

[turkeybird56]

Sounds like a ground or RCA

Ground or amp load. I guess I am older and in the minority, I just stick with my stock stuff (no fancy amp, alpine) etc., Hee hee, my hearing too poor to care. Too many years running around with amp, woofer, monster speakers hooked up to an 8 track with Thrush exhaust ending under the bucket seats, boy those were the days, (and I think the acft engines running up 20 feet from me not help either), LOL

 

[buddy guy]

its not uncommon for pple to think they have a good ground because they are screwed into a metal panel. learned years ago to sand the grounding spot to bare metal. sometimes it can be as simple as painted metal and a bad ground.

 

[Nathaniel Mathis]

So after disconnecting the microphones everything starting working smoothly. It was the mics under the drivers seat. I still have use of them but was told it was the highway mics that had to be disconnected.

 

[Don_T]

I installed a JL Audio amp and sub in my ‘19 with the HK system and I have no noise issues. I wonder what is different about yours?

 

[Dennis Younker]

So after disconnecting the microphones everything starting working smoothly. It was the mics under the drivers seat. I still have use of them but was told it was the highway mics that had to be disconnected.

Where are these mics under the driver's seat? I can't find them.

 

[Dennis Younker]

PS this is caused by the ANC system, not grounding issues, et al. Disconnecting the mics will resolve it. But are there actually mics under the seat or are you saying you disconnected the wires on the silver box there (as noted in other places on this forum)? If the latter, which wires did you disconnect? I've seen discussion of the four mics and their associated wire coloring but not which mic number is where.

 

[Don_T]

PS this is caused by the ANC system, not grounding issues, et al. Disconnecting the mics will resolve it. But are there actually mics under the seat or are you saying you disconnected the wires on the silver box there (as noted in other places on this forum)? If the latter, which wires did you disconnect? I've seen discussion of the four mics and their associated wire coloring but not which mic number is where.

If the noise canceling is the culprit, I wonder why my truck isn’t having the same issue? I have an aftermarket amp and my truck has the ANC system as well.

 

[Dennis Younker]

I can't speak to that. The ANC ignored my first sub amp but I had to replace it (it was overheating). The ANC now is not playing nicely with the new amp. There are threads in the Audio & Electronics forum here about problems with ANC and the fixes. I'm going to work on mine this weekend.

 

[Nathaniel Mathis]

PS this is caused by the ANC system, not grounding issues, et al. Disconnecting the mics will resolve it. But are there actually mics under the seat or are you saying you disconnected the wires on the silver box there (as noted in other places on this forum)? If the latter, which wires did you disconnect? I've seen discussion of the four mics and their associated wire coloring but not which mic number is where.

The mics are in the headliner but there is a box under the seat that had to be disconnected.

 

[Dennis Younker]

Thanks, I figured that out later after posting my question. I bought a bypass harness and went that route. The humming has been eliminated.

 

[ErnieD]

Thanks for your input. I will post up what happened and the fix in a couple hours.

Did you figure it out? I just installed an amp with a LC6i line out converter and I’m having some issues. The sound is great then all of a sudden my left front door speaker picks up a loud static noise like when your radio is tuned in between FM stations.