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Author Topic: replace bose system  (Read 5044 times)

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lightfj

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replace bose system
« on: 14 March 2010, 15:52:25 »

Can anyone please explain the problems with replacing HU with aftermarket one.
I would like a good 7" screen dvd satnav bluetooth unit but I have Bose in my elite.
I would have thought that the HU output would go to the Bose amp under the back shelf and then to all speakers.
So why can't the new HU outputs go to the Bose amp?
Am I missing something?
I'm scratching my balding head over this and it's beginning to hurt.
Thanks in advance
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tunnie

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Re: replace bose system
« Reply #1 on: 14 March 2010, 15:54:16 »
Bose speakers & Amp are 2Ohm, not 4Ohm, any replacement headunit will need Bose speakers & amp removed and replaced.
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lightfj

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Re: replace bose system
« Reply #2 on: 14 March 2010, 15:57:47 »
ok so the output impedance won't match.
Cant you just replace the bose amp with a 4 Ohm one and replace the speakers with 4 ohm ones and use the existing wiring?
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tunnie

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Re: replace bose system
« Reply #3 on: 14 March 2010, 16:00:17 »
err pass, Dave DND is your man, but i believe loom needs to be replaced too
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TheBoy

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Re: replace bose system
« Reply #4 on: 14 March 2010, 19:13:36 »
Quote
ok so the output impedance won't match.
Cant you just replace the bose amp with a 4 Ohm one and replace the speakers with 4 ohm ones and use the existing wiring?
yup
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TheBoy

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Re: replace bose system
« Reply #5 on: 14 March 2010, 19:16:01 »
Should add those double din screens in facelifts are pretty unsuccessful, due to being too low to be useful.

But if you have your heart set on one, but a decent one, not one of the excessively crappy, cheap, unreliable unbranded/no-name junk being sold on ebay for less than £400.
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duggs

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Re: replace bose system
« Reply #6 on: 14 March 2010, 19:39:48 »
I changed my HU to a Sony. The AMP had already been removed before i got her and the rear speakers rewired. ((Rear door speakers don't work)

The large BOSE speakers on the rear shelf seem fine BUT I had to replace the ones in the front doors....they were starting to fail big time.

Wiring wise...left as was.
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Dave DND

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Re: replace bose system
« Reply #7 on: 14 March 2010, 20:04:04 »
Quote
ok so the output impedance won't match.
Cant you just replace the bose amp with a 4 Ohm one and replace the speakers with 4 ohm ones and use the existing wiring?

Yes - By far the most viable way around it.

 :y

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lightfj

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Re: replace bose system
« Reply #8 on: 15 March 2010, 06:00:13 »
Many thanks to everyone for their help. Will need to ponder long and hard and inspect the piggy bank.
Having said that I do dislike a phone cradle ans a sat nav cradle adorning the dash. The thought of a neat layout is very tempting.
Thanks

Lightfj
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duggs

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Re: replace bose system
« Reply #9 on: 15 March 2010, 16:06:21 »
Bluetooth through the radio is a godsend not least because my daughter can sit in the back and bluetooth her music through the car stereo...keeps her happy. My music isn't quite what she's in too.
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oceansoul

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Re: replace bose system
« Reply #10 on: 15 March 2010, 20:46:18 »
I know this isnt possible because it would be common practice, but why cant you just put a 2ohm resistor in series with the speaker?? 2 ohm speaker + 2 ohm resistor = 4ohm load??? Explain.
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Dave DND

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Re: replace bose system
« Reply #11 on: 15 March 2010, 22:45:58 »
Theoretically yes, you are correct

However, it would sound absolutely S@*% !!!

 ::)

Do it properly and replace the poor 2 Ohm speakers with something respectable.

 :y

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Rogusu

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Re: replace bose system
« Reply #12 on: 23 March 2010, 15:28:04 »
Greetings and salutations.

I would like to ask in this topic instead of creating a new one. I am also trying to change head unit on BOSE system with something better. I was googling for something and I have found some adapter from SCOSCHE which should be designed right for lowering signal from standart unit to BOSE amp. As I am no expert in this, I would like to ask if this can work? Or is it possible to use other headunit from newer BOSE equiped GM cars?
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Dave DND

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Re: replace bose system
« Reply #13 on: 23 March 2010, 16:14:30 »
Quote
Greetings and salutations.

I would like to ask in this topic instead of creating a new one. I am also trying to change head unit on BOSE system with something better. I was googling for something and I have found some adapter from SCOSCHE which should be designed right for lowering signal from standart unit to BOSE amp. As I am no expert in this, I would like to ask if this can work? Or is it possible to use other headunit from newer BOSE equiped GM cars?

I have heard of people modifying the Porsche /BOSE adaptor with varying amounts of success, but generally speaking BOSE/OMEGA differs from BOSE/OTHER.  Generally ends up the same way though, by ripping out and replacing stuff in the end.

Curious.
What head unit did you have in mind from a later Vx car then?
 :-?
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Rogusu

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Re: replace bose system
« Reply #14 on: 24 March 2010, 07:16:02 »
That is bad :( The sound is OK for me and I dont have time and experience to change all stuff. I just need the possibility to play CDs at least. Video/nav/bluetooth will be nice bonus... Why it has to be different  :-[
Honestly, I didn't have any head unit in mind :) I wanted to know if it is possible before I will look for some (so I will know the parameters needed) :)
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