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Hi I recently installed a new system in a 1999 chevy Tahoe. I’m getting a whining noise from my speakers. And it gets higher pitch with higher acceleration. I’ve Been reading online trying to figure it out but am kinda stuck. I am using a ces 40ah lto so it’s in the back of the vehicle. I have a mechman 400a alternator with dual runs of 1/0 going to the battery in back. I have 1/0 cable from the engine block to the frame, and two runs of 1/0 from the battery in the back to the frame. Then the 4 channel amp is grounded to the body by the rear fender. And the mono amp is grounded to the battery itself. I have  both rcas  on the passenger side along with passenger speaker wire. Driver side has speaker wire and power wire for the 4channel amp. Also have the amp remote wire on passenger side. I removed passenger side speaker outputs and whine was still present in driver side. So I removed driver side as well and there was no whine. So with all speakers disconnected no whine. I also unplugged rcas, with speaker outputs connected and the whine was present. Some pics of the connections. Thanks in advance. 

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

06 Charger

Pioneer double din

Pioneer 6.5 and 6×9's

Knukoncept Krystal kable rca's

0 ga knukoncept kolossus wire 

Big 3 same wire ^ 1 run 

8g karma ss speaker wire

Sundown sia 3500d at 1ohm

2 Sundown U series 12's

Duralast platinum agm H7 (Main)

Xs power d3400

Trying to find a ho alt

 

 

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Or bad rca's

06 Charger

Pioneer double din

Pioneer 6.5 and 6×9's

Knukoncept Krystal kable rca's

0 ga knukoncept kolossus wire 

Big 3 same wire ^ 1 run 

8g karma ss speaker wire

Sundown sia 3500d at 1ohm

2 Sundown U series 12's

Duralast platinum agm H7 (Main)

Xs power d3400

Trying to find a ho alt

 

 

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Yea find somewhere else to ground the head unit to 

06 Charger

Pioneer double din

Pioneer 6.5 and 6×9's

Knukoncept Krystal kable rca's

0 ga knukoncept kolossus wire 

Big 3 same wire ^ 1 run 

8g karma ss speaker wire

Sundown sia 3500d at 1ohm

2 Sundown U series 12's

Duralast platinum agm H7 (Main)

Xs power d3400

Trying to find a ho alt

 

 

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Another thing to try would be doing the big 4 upgrade, basically just adding another upgraded ground to the chassis, just like you did to the frame. Adding another ground from the battery, and putting it close to where your 4 channel is grounded can help as well. 

Where exactly is the ground for the 4 channel located? 

2011 Chevy Silverado under construction

My build log here. Check it out! 

 

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23 minutes ago, Dafaseles said:

Another thing to try would be doing the big 4 upgrade, basically just adding another upgraded ground to the chassis, just like you did to the frame. Adding another ground from the battery, and putting it close to where your 4 channel is grounded can help as well. 

Where exactly is the ground for the 4 channel located? 

I grounded the 4 channel to the body right above the rear wheel well. Behind a body panel. I took the paint down to bare metal and tapped a hole for the bolt. I have two grounds coming off of battery. I was wondering if I need to replace the two stock ground straps that come off the frame and go to the body. I have 1/0 from engine to the frame, and on that same location the stock straps go to the body. Should I try changing those to 1/0 as well?

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What kind of rca's do u have 

06 Charger

Pioneer double din

Pioneer 6.5 and 6×9's

Knukoncept Krystal kable rca's

0 ga knukoncept kolossus wire 

Big 3 same wire ^ 1 run 

8g karma ss speaker wire

Sundown sia 3500d at 1ohm

2 Sundown U series 12's

Duralast platinum agm H7 (Main)

Xs power d3400

Trying to find a ho alt

 

 

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36 minutes ago, Ceeze90 said:

I grounded the 4 channel to the body right above the rear wheel well. Behind a body panel. I took the paint down to bare metal and tapped a hole for the bolt. I have two grounds coming off of battery. I was wondering if I need to replace the two stock ground straps that come off the frame and go to the body. I have 1/0 from engine to the frame, and on that same location the stock straps go to the body. Should I try changing those to 1/0 as well?

Electrical is only as good as its weakest link, and those straps are probably it. 

I wouldn't replace them, I would add to them. I would add another ground from the battery, directly to the body, close to where you grounded the 4 channel. 

How long is your ground for the 4 channel? The shorter, the better. 

Can you ground the amp straight to the battery? That would help as well. 

Why did you pick that particular spot? If the wheel well is kind of welded into the body, that's not a good spot because welds tend to not be good conductors. You need the thickest, most solid piece of sheet metal that's as close to your amplifier as you possibly can, if you want to ground it to the chassis. 

2011 Chevy Silverado under construction

My build log here. Check it out! 

 

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