DIY: B6 A4 - Symphony 2 to Symphony 2+ Upgrade

[diagnosticator]

I just got my harness and it work like a dream. After $65 for key code from dealer. Grrr... Ok Just like everyone says, the audio is better, looks nicer etc..
But the radio quality goes down the drain..

I have 04 Avant and it has the fin on the roof. I'm assuming it's the antenna, and I notice an extra cable that is not used after conversion.

My question: Can I reuse the original install anntenn plug?

The roof antenna is the antenna for the SAT receiver/tuner.

[AvantJunkie]

Is there any way to visually tell the difference between the bose harness and the non-bose harness? Color of connectors? Different pin assignments? I did a quick search, but couldn't find anything conclusive. The reason I ask is that the guy I bought mine from wasn't exactly sure if the harness he supplied me was the bose or not. I don't have the code for my stock HU, so I'd rather not pull it out to check or I could be left without a stereo. Any help is greatly appreciated...TIA.

[diagnosticator]

The Bose harness adapter, will have four channels line out to the external amps. A non Bose uses a different set of terminals in the quadlock connector to drive the two front channels directly from the HU. and the two rear channels from line level. It's one or the other, The diagram on the Sym II+ case, should clarify this.

[AvantJunkie]

^^Thank you!!

[AvantJunkie]

The Bose harness adapter, will have four channels line out to the external amps. A non Bose uses a different set of terminals in the quadlock connector to drive the two front channels directly from the HU. and the two rear channels from line level. It's one or the other, The diagram on the Sym II+ case, should clarify this.

So after reading your explanation and checking out the diagram on the unit itself, I decided to pull out my stock HU and see for myself what exactly the connections looked like. And exactly like you explained, they're are only two connectons on the back of my stock HU (Bose system), as opposed to the four connections comming off the quadlock non-Bose harness that was included with my II+. Correct me if I'm wrong, but I believe it's safe to say that for those of you who are unsure what harness you have, if it has the four connectors(brown, red, and two black) coming off of the quadlock, it is the non-Bose harness.

[diagnosticator]

So after reading your explanation and checking out the diagram on the unit itself, I decided to pull out my stock HU and see for myself what exactly the connections looked like. And exactly like you explained, they're are only two connectons on the back of my stock HU (Bose system), as opposed to the four connections comming off the quadlock non-Bose harness that was included with my II+. Correct me if I'm wrong, but I believe it's safe to say that for those of you who are unsure what harness you have, if it has the four connectors(brown, red, and two black) coming off of the quadlock, it is the non-Bose harness.

Sorry if my reply was confusing, the Bose system has four channels line out to the external audio amps, the non Bose, has the two front channels driven by the HU directly, and the two rear channels as line level outputs to the rear channel/Subwoofer amp.

For a Bose setup, the quadlock connector terminals described next are populated with a wire to the ISO connectors at the other end of the harness adapter:

T12f/5 Blue, Bose coding to ground.

T12/3 Green, Left front channel line out to amp R12

T12/5 Left Rear channel line out to amps R44/R12

T12/8 Signal ground to amps R44/R12

T12/9 Right Front line out to amp R12

T12/11 Right Rear line out to amps R12/R44

T12/7 K line for Diagnostics to ISO connector

T8h/9 CAN buss High Infotainment

T8h/10 CAN Buss Low Infotainment

T8h/14 Ground connection via central convenience control module. Anti Theft warning system.

T8h/15 30, +12vdc Jumpered to T8h/16, Anti Theft Warning System.


The above connections are for the Bose setup, the other listed connections must be present and connected to the appropriate ISO terminal connector so that the Sym II+ will boot up and then be able to be turned ON. The K line diagnostic connection must be connected so that the HU can be coded properly after installation.

[AvantJunkie]

Thanks for the clarification! I'm obviously more of a visual person and was having a little difficulty applying your description to what I was actually looking at. Now I just have to order the right harness--Thanks again!

[kerNol]

So what harness would I need to convert my Bose Symphony II in my 04 B6 over to a Symphony II+, I currently have the factory SAT setup and would like to keep it. Where or who can I get the adapter harness from?

[AvantJunkie]

So what harness would I need to convert my Bose Symphony II in my 04 B6 over to a Symphony II+, I currently have the factory SAT setup and would like to keep it. Where or who can I get the adapter harness from?

Here's where I just ordered mine from-**-> https://www.euro-parts.us/product.ph...cat=263&page=1

[A4natomical]

Here's where I just ordered mine from-**-> https://www.euro-parts.us/product.ph...cat=263&page=1

I'm in the same boat as post 88. Bose/SAT Symphony II to Symphony II+. Which upgrade option do I select in this link?

[AvantJunkie]

I'm in the same boat as post 88. Bose/SAT Symphony II to Symphony II+. Which upgrade option do I select in this link?

You will go with the Symphony II to Concert III upgrade. Concert III is another name for Symphony II+.

[A4natomical]

You will go with the Symphony II to Concert III upgrade. Concert III is another name for Symphony II+.

Awesome, thank you.

[A4natomical]

Is this the antenna adapter I will need to hook up my Symph II+?

https://www.euro-parts.us/product.ph...cat=280&page=1

[Undisputed]

Yes that's it.

[A4natomical]

the Sym II + quadlock harness connector has the input pins for the signal from the Aux device line out, you can use whatever connector plug style needed for the device used as the signal source.

On the Quadlock harness connector, the T12f (Blue,) Aux inputs are Pin 1=Aux in Left channel, Pin 3 = Aux in ground, Pin 7 = Aux in Right channel. Then the Sym II+ HU must be recoded to activate the AUX input.

BTW, Audi has an iPod base plate available.

Does anyone know what the new software code would be to run the AUX option?

I'm going to be hooking up my harness adapter to an aux cable tonight.

EDIT: think I found it:

http://wiki.ross-tech.com/wiki/index...II_Plus#Coding

[diagnosticator]

Does anyone know what the new software code would be to run the AUX option?

I'm going to be hooking up my harness adapter to an aux cable tonight.

EDIT: think I found it:

http://wiki.ross-tech.com/wiki/index...II_Plus#Coding

Yeah, that is the correct coding options for the Sym II+.

[A4natomical]

Love the outcome.

[Undisputed]

That looks great with the B7 buttons. Where did you find them and how hard was is to swap them out?

[A4natomical]

That looks great with the B7 buttons. Where did you find them and how hard was is to swap them out?

Minh had them for sale. Extremely easy to swap out, you just need to take the HU out for it.

[my1stturbo]

Has anyone come up with a good way to boost the radio quality after the swap?

[boy412]

Minh had them for sale. Extremely easy to swap out, you just need to take the HU out for it.

Who is Minh? Link? Looks nice...

:)

[my1stturbo]

So i decide to take the plunge today and go install my II+ during lunch only to find out that my current radio has no red connector. In its place are 3 wires with crimp on connections that are just connected to the pins on the back of the radio. The PO had a bluetooth module in the car so I'm wondering if that is still in place. Either way I'll have to figure out how to get the keys out and then try this again tonight.

[Rocs]

Love the outcome.

What king of ipod hookup is that? how was it done?

[JBM]

about to pull the trigger on this but I have a Dension Ice Link. Can i move this over to the II+ from my II? Thanks.

[AKOeuro]

How come the OP's doesnt match the trim surrounding it like the AC trim, but a4natomical's looks to be perfect? am i missing something are their different trims?