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*UPDATED* I DID IT! solved the bose system upgrade issues

*UPDATED* I DID IT! solved the bose system upgrade issues

Postby funnytoe [OP] » Sep 30 2012, 4:34pm

finally did it. after doing tons of research on the way the bose system functions on our trucks i found the way to make everything work.

i have read so much and looked at so many electrical schematics i felt m head was going to explode. took me about a month of researching and finally did my first test with great success to far. its been 24hrs since i did this and the system is going strong. no blown fuses or engine noise .

so the people at BOSE are no help at all when it comes to getting info about there system. the dealership has no clue or just doesn't want anyone to upgrade. the other companies that make adapters just want to sell you more electrical components to add to your already complicated Bose system.

ok so i bought my truck brand new back in december of 09 . i have kept it stock this whole time but just hated to Bose sound system it came with. my truck has so many add ons from factory that i did not want to lose any of them also i do not want to cut any factory wires or harnesses off.did that with my last car and 10 years later when i had to put it back to stock it was a pain in the butt. so did not want to do that again.

finally about 2 months ago i just couldn't take that lame system anymore i have tons of cool audio stuff just sitting in my closet so i decided to go ahead and put a nice sound quality "SQ" sound system together.

my goal to have a "great" sounding system that just blends into my truck. keep everything hidden make it look stock. i want everything to work. steering wheel controls,on-star,back up sensors,warning chimes,turn signals,blue tooth,XM radio.

ok what i found out is that "GM" has 2 kind of Bose sound systems.
1. the standard Bose system .its in about all there Bose equipped cars and trucks
Image
the standard amp has the 3 harness plugs you see above.

2.the Bose luxury system. the speakers and sub are the same ones as the standard system but it has a way better amp. feeds more power and sounds better than the standard system. that one comes in GMC denali,Cadillacs,and some top of the line silverados.
that amp has 4 harness plugs.
Image
the amp is also slightly bigger
Image

i came to find out that there is big difference between both systems besides the power.

luxury system has a smart amplifier . there is a bus data line that runs from the head unit to the amp. the amp does all the thinking and crossover points for the system. it takes care of all the chimes , sensors , blue tooth, on and on. so the amp is very important to the system

the standard Bose system has a "DUMB" amp. its nothing more than a slave unit it does nothing more than amplify the signal. it does have a built in crossover that all the settings are set for. when the volume goes up past a certain point the amp turns power down to the sub to protect it . other than that the amp does nothing more.all your chimes , on-star, sensors, on and on (lol) are processed through your head unit.

after finding that out and knowing the bean counters at GM i knew that the standard bose amp was not going to have a signal sensing amp to turn on when it knows there is sound coming in. but the had to be a remote 12volt wire.
guess what? THERE IS

i came to find out that Bose did do some nice things to the head unit.the stock head unit from GM that are Bose the output from the unit to the amp are NOT high level speaker outputs like your regular non-bose head units. instead they are low level rca signals . i removed the cable and stripped back enough electrical tape to find not speaker cable but rca cable.
it also feeds a balanced low level signal. with a ground bleeder. so no engine noise is pick up. now my amps can handle balanced inputs
some amplifiers don't. but thats not a problem audio-control makes signal converters that make a balanced signal to analog so you can still keep your amp. there not too expensive.
the Bose head unit outputs 6.5 volts WOW that blows away a lot of the after market units out there .so after testing out all my research i went ahead and searched for weeks to find a harness i was not going to cut my cables

well this is what i came up with . the stock BOSE head unit sounds incredible . i cant believe the stock head unit can produce such a clean signal to my amps.

best of all EVERYTHING works like factory. my chime , turn signals are not amplified they sound just like before. even though im running some major power and all new speakers.

the factory Bose head unit feeds 4 channels out. front, left , right, and rear , left, right. the stock Bose amp internally separates the signal and gives you front,left , right, rear , left , right , but also sends out a sub output. the sub output is created by the amp not the head unit. the head unit just feeds a clean unfiltered full signal.

so this is what i made . its a straight plug and play. it plugs in at the center console . dont even have to remove the deck. i removed my amp and sub out of the center console . everything works great.

i will keep you posted incase i find any bugs. i have been thinking of maybe selling some if everything works out. to recover some of the cost of the special crimpers i had to buy to crimp the special harness pins i had to buy. those new pins GM is using are so small that the tyco and molex crimpers are too big.
Image

by the way as far as i know this wont work on luxury Bose systems .

i will late do a full post on my set up . once i catch up on some quality time with my family. this project took lots of time just to get a simple easy solution.

UPDATED:
bose upgrade with no adapter
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I DID IT! solved the bose system upgrade issues

Postby Machster69 » Sep 30 2012, 4:55pm

Thats alot of information. Thanks for adding the information to the site!
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Re: I DID IT! solved the bose system upgrade issues

Postby allterrainjoe » Sep 30 2012, 5:18pm

Great info, thanks........
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Re: I DID IT! solved the bose system upgrade issues

Postby Zxceelxuz » Sep 30 2012, 5:55pm

Gonna have to remember this.
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Re: I DID IT! solved the bose system upgrade issues

Postby Voodoo » Sep 30 2012, 6:09pm

Great info.

Do you happen to have a Chruch Boys steering conversion on your car? Chuck is a good friend of mine. I thought I recognized your car from Steves Nova Site.
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Re: I DID IT! solved the bose system upgrade issues

Postby funnytoe [OP] » Sep 30 2012, 10:16pm

hi voodoo.
i haven't been on steves in a while. i have been so busy i am just starting to free some time up to work on my nova again. no i dont have a church boys kit. right now i have no front clip on the car. im welding in a full frame narrowing in the rear axel and new frame rails to fit big fat tires out back. im going with a TCI front clip. due to the fact that im going with full air bag suspension .

anyway im glad i finished doing the system on my truck time to move on back to the nova
Last edited by Onlyina_Chevy on Sep 24 2013, 2:48pm, edited 1 time in total.
Reason: Removed unneeded quote.
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Re: I DID IT! solved the bose system upgrade issues

Postby cruisin_n_style » Oct 02 2012, 3:04am

I WANT ONE! I'll buy one from you! I have been doing the exact same thing you were...researching these systems a lot. I had settled for the idea of using an audiocontrol unit and tapping into the rear speakers by the factory amp then running the signal to my amps. Then using the stock front drivers side speaker tucked under the dash to retain the stock chimes and then running my own new wires to the new door speakers. I just got everything purchased sitting in my basement waiting for the install.

But I would LOVE to use this part you made so I wouldnt have to strip or splice into any wires etc.


(By the way, what did you use for signal to the sub? A clean full signal bypassing the factory amp all together? I just ask because I could see the front left, right and rear left, right lines in your picture since you labelled them, but I see nothing about the subwoofer.)
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Re: I DID IT! solved the bose system upgrade issues

Postby funnytoe [OP] » Oct 02 2012, 1:02pm

the stock Bose amp has only 4 channels in. the amp internally separates the signal in its built in crossover. so it has 4 going in and 8 coming out.
yes 8 . they run a dual voice coil sub. but feed all 4 wires from the amp instead of just running 2 wires to it.

i ran 3 sets of RCA's in my truck just incase that i needed to run a audio control unit. but i have no need. my amps have a RCA output.

i fed the front out puts to the front output of my 4 channel amp. rear output to the rear output of my 4 channel amp. then i ran a set of RCA's from my 4 channel amps output to the input of my 2 channel sub amp.

i used my built in crossovers that are built into my amps. i will try to post all the info today on my install.i will also see how much interest there is in the harness. i will pm you " cruisin n style" later on the harness. but the harness works flawless . so im going to start to look into maybe making some. depending on interest .

by the way it works with all stock Bose head units even the built in navigation units. as long as its not a luxury amp set up
Last edited by Onlyina_Chevy on Sep 24 2013, 2:49pm, edited 1 time in total.
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Re: I DID IT! solved the bose system upgrade issues

Postby funnytoe [OP] » Oct 02 2012, 6:43pm

here is a look at how i set up my system .
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Re: I DID IT! solved the bose system upgrade issues

Postby kpunt45 » Oct 02 2012, 7:36pm

funnytoe wrote:
cruisin_n_style wrote:(By the way, what did you use for signal to the sub? A clean full signal bypassing the factory amp all together? I just ask because I could see the front left, right and rear left, right lines in your picture since you labelled them, but I see nothing about the subwoofer.)


the stock Bose amp has only 4 channels in. the amp internally separates the signal in its built in crossover. so it has 4 going in and 8 coming out.
yes 8 . they run a dual voice coil sub. but feed all 4 wires from the amp instead of just running 2 wires to it.

i ran 3 sets of RCA's in my truck just incase that i needed to run a audio control unit. but i have no need. my amps have a RCA output.

i fed the front out puts to the front output of my 4 channel amp. rear output to the rear output of my 4 channel amp. then i ran a set of RCA's from my 4 channel amps output to the input of my 2 channel sub amp.

i used my built in crossovers that are built into my amps. i will try to post all the info today on my install.i will also see how much interest there is in the harness. i will pm you " cruisin n style" later on the harness. but the harness works flawless . so im going to start to look into maybe making some. depending on interest .

by the way it works with all stock Bose head units even the built in navigation units. as long as its not a luxury amp set up


I would be interested as well
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