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21 Sierra AT4 Subwoofer install

kdmack

By kdmack
in Modifications, Wheels & Tires

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kdmack Enthusiast

kdmack

Posted
Posted

Just figured I would post some photographs and details about a recent Subwoofer install I did on my AT4 with BOSE.  I noticed there is not a lot of information out there currently on adding a non factory subwoofer.  Overall I found the process very simple especially since I purchased a wiring harness from A.I.S Audio which worked flawlessly.  Loving the amount of extra bass now. Subwoofer is a JL10 thin woofer paired with a Kenwood Exceleron monoblock.  Figured I would post in case anyone else is on the fence about this upgrade and wondering how to accomplish it.

240917706_543576220281460_4590894295208289683_n.jpg

240829234_4291503560932785_1247048022643813499_n.jpg

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kdmack Enthusiast

kdmack

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20 hours ago, TxTruckMan said:

Nice. But my kids would destroy that Amp. Where did the harness connect to for inputs?

Harness plugged into the Bose amp behind the rear seats. Super easy plug and play using the PAC LP7

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kdmack Enthusiast

kdmack

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58 minutes ago, AML said:

Where did you source the woofer box?

Got lucky and found a shop locally who had one that was custom built.  I just needed to carpet it, then I added some extra pieces on the front so I could downward fire it.  I thought it worked out pretty nice.

bluemonstercali Enthusiast

bluemonstercali

Posted
Posted

Incase in the future you decide the bass is a little too strong like I did you can swap out the 2 front dash speakers to help. I added audio frog 2.5 upfront and it helped with the clarity a ton. I did not amplify them just ran them off of the factory bose amp. 

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kdmack Enthusiast

kdmack

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On 9/15/2021 at 2:14 PM, snowman44 said:

Did you trim your underneath storage?  I have same set up with the storage and dont want to have to take whole thing out to put in sub.

Yes I just cut the underneath storage using a very sharp reciprocating saw and also cut in a few notches on my all weather mats. 

  • 2 months later...
MikeBender1972 New Member

MikeBender1972

Posted
Posted

Where exactly is the factory amp? Working on a truck with the bose system and the rear seats don't fold down they have the storage cubbies in the seats. Will I have to remove the rear seats? 

BT3 Enthusiast

BT3

Posted
Posted

Smack dab in the middle of the back wall along with the inverter 
 

have to remove the back seat to get to it 

 

there are a few tutorials on YouTube on how to do it

 

 

MikeBender1972 New Member

MikeBender1972

Posted
Posted

I found the factory amp. Would anyone know which outputs are for the factory subs in the dash? 

 

I have searched all over A.I.S. Audios website and have not found the harness O.P. is referring to... Maybe I'm blind

  • 2 years later...
Anthony Gill New Member

Anthony Gill

Posted
Posted

I really like how you trimmed down your storage part. I’ve been wondering if there’s anyone out there that has done an install but with keeping the storage compartment. Because I would like to do the same just center the subwoofer and keep the storage on the sides. You kinda gave me an idea. 

  • 5 weeks later...
Russ757 Enthusiast

Russ757

Posted
Posted
On 6/6/2024 at 8:58 PM, Anthony Gill said:

I really like how you trimmed down your storage part. I’ve been wondering if there’s anyone out there that has done an install but with keeping the storage compartment. Because I would like to do the same just center the subwoofer and keep the storage on the sides. You kinda gave me an idea. 

 

PXL_20220822_160129897.jpg

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