Subwoofer Outputs On Stock Amp

[Ironic_Masster]

Hey all,

Just got my manuals today and went right for the audio circuits
According to the manual (page8-650) the gray connector with 8 wires has audio subwoofer outs. The wires are:

rear subwoofer Speaker output (-) pin A {LT GRN/Blk}
rear subwoofer Speaker output (+) pin B {DK BLU/WHT}

I haven't traced where they have these wires going yet. Since there are wires in the connector they might just deadend somewhere. We should be able to use them for speaker level in on an extra amp for a subwoofer. I wouldn't want to hook one up as a permanent situation because I feel the amp doesn't have enough power but, I will be testing it later this week. I hope To see if it is live.

On this same connector it has outputs for something they're calling:

Right D Pillar Speaker Output (+) {DK/GRN}
Left D Pillar Speaker Output (-) {LT BLU}

I'm wondering if these might be the outputs for the tweeters in the dash pillar Though I don't know where the other - & + for these would be

Any thoughts, comments or ideas

IM

 

[carrerarod]

hmmm...interesting....I need to check my chart but those colors i think are also used for a couple of the speakers. Wonder if they are just suggesting tapping into the rear feeds.....

interesting....

 

[BlackAv2002]

could it be the amp is the same amp used for the boase audio system?

the pilar outputs would make sense as would the sub outputs or maybe he is refering to a 03 manual?

 

[Chief]

could it be the amp is the same amp used for the boase audio system?

the pilar outputs would make sense as would the sub outputs ?or maybe he is refering to a 03 manual?

From what I have heard, it is not the same Bose amp that is in the new 03's.

The 03's have tweeters on the A pillars. The reference for outputs for the D pillars sounds like they may be talking about a speaker configuration for a Suburban or other vehicle.

 

[ShapeShifter]

On this same connector it has outputs for something they're calling:

Right D Pillar Speaker Output (+) {DK/GRN}
Left D Pillar Speaker Output (-) {LT BLU}

I'm wondering if these might be the outputs for the tweeters in the dash pillar Though I don't know where the other - & + for these would be

The dash piller would be the "A" pillar. "B" piller is between the front and rear doors. "C" pillar is behind the rear doors, and the "D" pillar would be all the way in the back. Unfortunately, the Av doesn't have a "D" pillar. In a Yukon/Tahoe/Escalade it would be the pillar between the side back window and the tailgate. Basically, you start at the windshield with A, and work your way back in order.

If you look at the diagram, you will see that the two D pillar speakers are wired together. (page 8-627 shows them in series, page 8-633 shows them in parallel.) Both speakers are driven from the same pair of wires, they do not get seperate left/right signals. My guess is that they are so far back, you really don't get any stereo imaging from them. BTW, they call this speaker a "twiddler", whatever that means.

I believe that in those truck models that have the speakers in the A (windshield) pillar, all they do is move the component tweeter that we have in the door up to the pillar. I would think that you would get better imaging moving the tweeter up to the pillar. (Page 8-632 shows one door speaker and one pillar tweeter. Page 8-627 shows two speakers per door)

Also, it's interesting that no matter where the front tweeter is (pillar or door) there is no crossover. On each side, the tweeter and the larger speaker (I hesitate to call it a woofer) are simply wired in parallel and driven by the same output. I would think that a proper crossover would have helped these speakers.

carrerarod: there is some comonality in colors, but they do have different circuit IDs on the diagram, which must mean that they really are seperate outputs.

-- SS

 

[ygmn]

The stock front speakers use a capaciter on the tweeter I think to act as its crossover...it was hard wired to it if I remember correctly...

 

[ShapeShifter]

The stock front speakers use a capaciter on the tweeter I think to act as its crossover...it was hard wired to it if I remember correctly...

That would make sense. That level of detail is not in the wiring diagrams, and I haven't opened up my door panels to replace the speakers...yet.

A capacitor on the tweeter. Yeah, it'll act as a crossover (a low pass filter) but it'll be rather poor, with a very gentle rolloff. But it's better than nothing.

The crossovers that come with a good pair of component speakers would be much better.

-- SS

 

[ygmn]

The crossovers that come with a good pair of component speakers would be much better.

They are

 

[carrerarod]

Yes the capacitor is soldered to the tweeter and YES almost anything is better than the stock speakers. Changing the front components will transform the sound in the cabin.

 

[zimmthumps]

My .02

We had to drop off a couple 02's Suburbans at the airport for some more GM big shots coming down, and in the premium stereo package they offer a little subwoofer speaker in the cargo area. I would bet that GM just uses that same amps in all these systems, and just doesn't use that channel on ours. Any thoughts

 

[carrerarod]

How big was the subwoofer Zimms? Also, would you really keep this small subwoofer using the OEM amp? C'mon....you know you wouldn't!

 

[Ironic_Masster]

hmmm...interesting....I need to check my chart but those colors i think are also used for a couple of the speakers. Wonder if they are just suggesting tapping into the rear feeds.....

interesting....

C-Rod,

The other connector ( this is from memory now ) has the outputs for front & rear speakers. On the next page in the manual is the other connector. Again from memory so beware

Wish I had my manuals with me but, I can't bring a forklift into work

IM

 

[Ironic_Masster]

could it be the amp is the same amp used for the boase audio system?

the pilar outputs would make sense as would the sub outputs ?or maybe he is refering to a 03 manual?

B-AV,

That's what I was thinking This may be the same amp.

And it's not the 2003 manual it's the 2002 from Delillo

IM

 

[zimmthumps]

How big was the subwoofer Zimms? Also, would you really keep this small subwoofer using the OEM amp? C'mon....you know you wouldn't! ?

It was behind a grille, so I couldn't get a good look at it, but I'd say it wasn't your standard circular subwoofer. Some kind of a modified "bass speaker" between like a 6"9" & an 8" sub.
Would I keep it? Never I'd cut up that rear well where it was mounted, and there'd be plenty of room for a 10" or 12"

 

[carrerarod]

The other connector ( this is from memory now ) has the outputs for front & rear speakers. On the next page in the manual is the other connector. Again from memory so beware ?

Wish I had my manuals with me but, I can't bring a forklift into work

IM

Thanks IM! I think I am going to order the manuals on CD off of eBay. Other members have reported that there is good information on it.

Not that I plan to ever keep anything stock but would like to have reference material on-hand to help members that have no desire to cross over to the dirty side!

 

[Ironic_Masster]

From what I have heard, it is not the same Bose amp that is in the new 03's. ?

The 03's have tweeters on the A pillars. The reference for outputs for the D pillars sounds like they may be talking about a speaker configuration for a Suburban or other vehicle.

Goo,

I'm still thinking we can use these output's for some Tweeter's in the front pillars and an input for another amp to drive a sub. I'll check into it more later this week.

IM

PS Did you by chance find the name of the company that sells those cool switches

 

[Ironic_Masster]

If you look at the diagram, you will see that the two D pillar speakers are wired together. (page 8-627 shows them in series, page 8-633 shows them in parallel.) Both speakers are driven from the same pair of wires, they do not get seperate left/right signals. My guess is that they are so far back, you really don't get any stereo imaging from them. BTW, they call this speaker a "twiddler", whatever that means.

I believe that in those truck models that have the speakers in the A (windshield) pillar, all they do is move the component tweeter that we have in the door up to the pillar. I would think that you would get better imaging moving the tweeter up to the pillar. (Page 8-632 shows one door speaker and one pillar tweeter. Page 8-627 shows two speakers per door)

Also, it's interesting that no matter where the front tweeter is (pillar or door) there is no crossover. On each side, the tweeter and the larger speaker (I hesitate to call it a woofer) are simply wired in parallel and driven by the same output. I would think that a proper crossover would have helped these speakers.

carrerarod: there is some comonality in colors, but they do have different circuit IDs on the diagram, which must mean that they really are seperate outputs.

-- SS

SS,

"Twiddler" very funny So, this could also possible be used to drive the sub/amp add-on

I saw that the components in the door were off the same feed but didn't thinkabout moving them. GREAT IDEA

And I really like the idea of putting in a crossover

Excellent work

IM

 

[Ironic_Masster]

My .02

We had to drop off a couple 02's Suburbans at the airport for some more GM big shots coming down, and in the premium stereo package they offer a little subwoofer speaker in the cargo area. ?I would bet that GM just uses that same amps in all these systems, and just doesn't use that channel on ours. ?Any thoughts

zimmAV,

That's what I'm hoping for I knew that with the help of everyone we could figure out what the stock stuff is capable of and where improvement's are needed.

IM

 

[Ironic_Masster]

Thanks IM! I think I am going to order the manuals on CD off of eBay. Other members have reported that there is good information on it.

Not that I plan to ever keep anything stock but would like to have reference material on-hand to help members that have no desire to cross over to the dirty side! ?

C-Rod,

I can't stress enough that you will not be disappointed in these manuals They were only $100 shipped from DeLillo and well worth it! If I have a question I have an instant point to starting learning from. Of course our site is better than the manuals in some respects . . . especially improvements

IM

 

[Bisonovich]

i tried wiring into these outputs i don't believe they have any signal on them...i tried to use them as high level in's on my amp...i ended up just taping into the wires for the right rear speaker...

 

[zimmthumps]

Mmmmm
Thanks for digging up this old topic and posting Bisonvich.
We had really never came to a conclusion concerning those outputs, and I had figured they were the same amps used to drive the systems with the rear sub - BUT I guess I was wrong.
So you got absolutely zilch from those leads?

 

[Bisonovich]

yes sir,
i had absolutely no signal on those two wires...so i had to cover them with electrical tape. it took me another day to work up the nerve to cut into some other wires. and when i tapped into the right rear, i suddenly had sound. so i figure those sub outputs must be dead ones b/c that was the only difference btwn no sound and some good bass through my system now.