V8QinNJ

Okay..so I *might* be doing something quite tabu..

I have '90 V8 Quattro (bose) with a Gamma CC head unit, and I'm trying to install a Concert into it. I already know it's a DIN+ and the changes for the pinouts, my question is once installed in the older car, is there away (VAG-COM or other) to get the unit into diag mode, to soft select the correct options? (such as bose)

Thanks!

Scott '90 V8Q

Bmthorn

You'll have trouble making it sound good with anything besides Gamma in there unless you replace the stock amps and speakers.

You also won't be able to VAG it in the V8 becuase it needs to be connected to a k line from an OBD II car.

V8QinNJ

Hummm.. I believe that to be true about the speaker resistance (and the amps are set for that) However I thought that the "line out" that feeds the amps would be the same from both units.

Do you (or anyone) have a concert manual or tech service guide that I could "borrow"?

Thanks for the heads up..

Scott

Bmthorn

My Concert says 4Ohms on the bottom and I never had Gamma Bose, but I'm pretty sure you can't add aftermarket speakers to it.

MacSub

There's a Bose pin on the power ISO connector. This just needs to be grounded to put the HU into Bose mode with the flat EQ. The Bose displayed on the HU is a VAGCOM setting, but is purely cosmetic.
Bose speakers are 2 ohm, non Bose are standard 4 ohm impedance. The pre-outs from the concert should be the same as the original HU, located on the mini-ISO plug. So no problems there as all the Bose speakers are driven by the seperate Bose amp.

V8QinNJ

Thanks..

This is what suspected. I read thru all the post back a few years befoe I did it and did notice the bose pin (Concert II??) I think the Concert I's pin is still labeled gamma.. (I don't which one I'm getting..it's from ebay.)But I'll be sure to ground it. The thing's to VAG would be some of the "other settings.. CD Player, secondary display things like that,. but I appreciate all the help!

Scott

Bmthorn

Soft coding allows you to toggle between powered front speakers for non-Bose and pre-outs for Bose.

MacSub

that's the only important bit. If you have a Bose system then you don't need to switch on the internal front amp.

Bmthorn

If the guy gets a Concert that was in a non Bose car he will need to VAG it.

Also, I'm going to test a Bose rear amp and speakers with Concert in a few minutes to see if it truly does work. A few people told me it should work, and I also read somewhere it wouldn't so now I'm curious.

V8QinNJ

Which was one of my original thoughts.. Thanks for lookin' out.