Sub Box-which Way To Go?

Motohead309 · October 22, 2008

Hello all,

I am looking at putting some subs in the back of my 05' Ext. Cab Silverado. It has the Bose 6-cd changer with what I assume is a 7 speaker system. (When you include the Bose Sub)

I checked with a local shop about building a box and for a pair of 10" subs not ported they are estimating a cost of 250-315$.

I just saw a post that listed the SubThump boxes. They are significantly cheaper at $190, but is the quality/fit/finish going to be the same?

I have been reading about how I would connect an amp to my stock HU, and I've installed components before, I just don't have the tools to build my own box and I've always heard a custom box is better than a pre-fab unit.

Any suggestions?

Thanks in advance

Motohead309

stadt11 · October 22, 2008

Welcome!

Where you from?

You cannot go wrong with SubThump, I have one in my CC. Quality & finish is perfect.

Since you have Bose & want to hookup to the stock HU, you'll want to tap into the sub-wires under the center console. I have a write-up somewhere here that talks about which wires to tap into.

Motohead309 · October 22, 2008

Welcome!

Where you from?

You cannot go wrong with SubThump, I have one in my CC. Quality & finish is perfect.

Since you have Bose & want to hookup to the stock HU, you'll want to tap into the sub-wires under the center console. I have a write-up somewhere here that talks about which wires to tap into.

I'm from part of the corn belt as well! Springfield, IL. to be exact. Thanks for the input on the box, I have to decide which way I am going to go, and you usually find solid advice on these forums.

From what I've read, there is an adapter I will need which will give me the RCA inputs for the amp. I believe this is it:

http://www.tupelosuperstore.com/pepacaoemgm24.html

I don't think I will need to tap into the sub from what I gather. This adapter is like a 'T' connector I think, one side plugs into the HU, the other to the stock plug, and the third goes into the adapter itself. On the other side of the adapter are the RCA inputs for the amp and the necessary turn on lead. Here is where I found that:

http://www.pac-audio.com/instructions/OEM-1.pdf

Does this sound right?

Thanks again for the input!

stadt11 · October 22, 2008

I'm from part of the corn belt as well! Springfield, IL. to be exact. Thanks for the input on the box, I have to decide which way I am going to go, and you usually find solid advice on these forums.

From what I've read, there is an adapter I will need which will give me the RCA inputs for the amp. I believe this is it:

http://www.tupelosuperstore.com/pepacaoemgm24.html

I don't think I will need to tap into the sub from what I gather. This adapter is like a 'T' connector I think, one side plugs into the HU, the other to the stock plug, and the third goes into the adapter itself. On the other side of the adapter are the RCA inputs for the amp and the necessary turn on lead. Here is where I found that:

http://www.pac-audio.com/instructions/OEM-1.pdf

Does this sound right?

Thanks again for the input!

I used a line-output converter which used the low-pass signal from the wires to my Bose sub.

Some info - http://www.gm-trucks.com/forums/index.php?showtopic=79584 & http://www.gm-trucks.com/forums/index.php?showtopic=82381

The PAC AOEM-GM24 may work though...

DofD · October 22, 2008

Hi there and welcome to GM Trucks!

The SubThump is a good box by all accounts.

As for the aftermarket amp. Do you intend to keep the OEM amp as well? If so, then the OEM-1 list C adapter could do the job for you.

Motohead309 · October 23, 2008

Hi there and welcome to GM Trucks!

The SubThump is a good box by all accounts.

As for the aftermarket amp. Do you intend to keep the OEM amp as well? If so, then the OEM-1 list C adapter could do the job for you.

Yes, that is the adapter. I stopped by a local shop to take a look at it, they said it should be applied before the amp. They even thought I may want to disconnect the factory sub. I don't think I will do that though, it has good sound now I'm just looking to add some low end to complete the feel.

Again, thanks for the advice all!

Motohead309 · October 31, 2008

Hi there and welcome to GM Trucks!

The SubThump is a good box by all accounts.

As for the aftermarket amp. Do you intend to keep the OEM amp as well? If so, then the OEM-1 list C adapter could do the job for you.

Yes, that is the adapter. I stopped by a local shop to take a look at it, they said it should be applied before the amp. They even thought I may want to disconnect the factory sub. I don't think I will do that though, it has good sound now I'm just looking to add some low end to complete the feel.

Again, thanks for the advice all!

I got my box from SubThump yesterday (very nice!) and I finally got all the wiring done last night, my subs should be in today. I just wanted to say thanks to you and Stadt11 for all your assistance. I will post some pics once I get everything installed and cleaned up. I am really anxious to see how it performs!

Thanks again,

Motohead309

stadt11 · October 31, 2008

Which LOC or adapter did you decide to go with?

Motohead309 · October 31, 2008

Which LOC or adapter did you decide to go with?

The PAC-OEMGM24:

http://www.amazon.com/PAC-AOEMGM24-Interfa...9549&sr=8-1

I also got the PAC LC1 Remote Amplifier Level Controller:

http://www.amazon.com/PAC-LC1-Remote-Ampli...9089&sr=8-1

I got the interface all hooked up and the radio is working fine, and I ran the RCA inputs to the amp that is connected to just a home speaker to set up the controls, but I have no sound. I don't know if it is because the speaker is 8 OHM and my amp is for 4 OHM or if it is the controls I need to tweak.

I just got the subs, so when I get them wired I can do further testing. Here is a schematic of how it will be hooked up:

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