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[mazza7282]

As my bose amplifier is no longer part of the audio of my car, its all running off my new HU, I have now decided that the old bose MIDrange speakers at the back are not good enough and I will change them.

Althogh as i cannot find a haynes manual for my facelift omega, just wondered if there was a quick and painless way of removing the MID range speakers from the car, I can see that they are screwed in, although I cannot figure out how to take carpet that surrounds the speaker out of the back, in my saloon.

Any help would be much appriciated

Thanks

[Elite Pete]

If it the speakers in the rear doors, you have to remove the whole door card.

[yingtong]

You shouldnt use any of the original Bose speakers with your new head unit as they are rated at 2 ohm, your head unit will expect an impedence of 4 ohm speakers IIRC.

Might be worth checking the forum for a more experienced view  

[yingtong]

There is some mention of it here:

http://www.omegaowners.com/forum/YaBB.pl?num=1212604963/24#24

[Marks DTM Calib]

Yup, the Bose units are 2 ohms and your head unit amp might not be stable into such a low impedance load.

[Dave DND]

Just for the record,

I have never seen, nor ever been made aware of a standard or aftermarket head unit that is 2 Ohm stable over 4 channels.

The Pioneer head units of a good few years ago that claimed 2 ohm stability was actually for running 3 channels giving you nothing more than 2 fronts at four ohms and a very low power single rear channel at 2 Ohms for a sub. Needless to say it was a pathetic effort and was dropped almost as fast as it was launched.

 

[mazza7282]

Just for the record,

I have never seen, nor ever been made aware of a standard or aftermarket head unit that is 2 Ohm stable over 4 channels.

The Pioneer head units of a good few years ago that claimed 2 ohm stability was actually for running 3 channels giving you nothing more than 2 fronts at four ohms and a very low power single rear channel at 2 Ohms for a sub. Needless to say it was a pathetic effort and was dropped almost as fast as it was launched.

 

Hi

Could you perhaps elaborate what you mean ? All I know is that my head unit seems to work ok through all the speakers, (well before i tried the steering controls, now i gotta get a new one)

Any guesses though in regards to removing all the carpet right at the back of the car, to remove the BOSE units in the back ??

Thanks

[TheBoy]

Just for the record,

I have never seen, nor ever been made aware of a standard or aftermarket head unit that is 2 Ohm stable over 4 channels.

The Pioneer head units of a good few years ago that claimed 2 ohm stability was actually for running 3 channels giving you nothing more than 2 fronts at four ohms and a very low power single rear channel at 2 Ohms for a sub. Needless to say it was a pathetic effort and was dropped almost as fast as it was launched.

 

Hi

Could you perhaps elaborate what you mean ? All I know is that my head unit seems to work ok through all the speakers, (well before i tried the steering controls, now i gotta get a new one)

Any guesses though in regards to removing all the carpet right at the back of the car, to remove the BOSE units in the back ??

Thanks

Put simply, you need to replace ALL the speakers, as the impedence is wrong for the HU.

To remove the shelf bass speakers, you need to remove parcel shelf (as you would have had to to remove the Bose amp, unless you butchered the plastic shelf). Remove seat bench, fold down rear seats, remove seat sides, likely need to remove at least one of the C pillar trims, possibly both, unbolt blind from boot if applicable, shelf pulls forward and up.

[Dave DND]

Just for the record,

I have never seen, nor ever been made aware of a standard or aftermarket head unit that is 2 Ohm stable over 4 channels.

The Pioneer head units of a good few years ago that claimed 2 ohm stability was actually for running 3 channels giving you nothing more than 2 fronts at four ohms and a very low power single rear channel at 2 Ohms for a sub. Needless to say it was a pathetic effort and was dropped almost as fast as it was launched.

 

Hi

Could you perhaps elaborate what you mean ? All I know is that my head unit seems to work ok through all the speakers, (well before i tried the steering controls, now i gotta get a new one)

Any guesses though in regards to removing all the carpet right at the back of the car, to remove the BOSE units in the back ??

Thanks

Put simply, you need to replace ALL the speakers, as the impedence is wrong for the HU.

To remove the shelf bass speakers, you need to remove parcel shelf (as you would have had to to remove the Bose amp, unless you butchered the plastic shelf). Remove seat bench, fold down rear seats, remove seat sides, likely need to remove at least one of the C pillar trims, possibly both, unbolt blind from boot if applicable, shelf pulls forward and up.

If you understand a bit of Ohms law, then you will see that a stereo with a 4 Ohm output connected to a 2 Ohm BOSE speaker will rapidly heat up and burn out.

Or put another way, the BOSE system used non standard speakers that had half the load resistance of 99.9% of everything else out there, and if you connected these up to a car stereo, the stereo would see them almost as a short circuit instead of seeing them as a speaker. If you imagine what would happen if the speaker wires touched each other, the stereo would become overloaded, heat up, burn out, go bang and even catch fire. To a conventional car stereo, there is little difference between touching the wires together and connecting a 2 Ohm speaker - it simply should not be done.

If you want to replace ANY PART of the BOSE system, you MUST remove it ALL, speakers, Amp and modify the wiring to suit, if not, you will encounter some problems.

[Andy B]

...... shelf pulls forward and up.

and can be bl00dy difficult to remove if a bit of the rear window glue has stuck the shelf in too.  :-?

[TheBoy]

...... shelf pulls forward and up.

and can be bl00dy difficult to remove if a bit of the rear window glue has stuck the shelf in too.  :-?

I never said it was easy

[Andy B]

....I never said it was easy

I spent ages trying to remove mine. I thought I must've missed something. Brute strength was the order of the day though!    

[mazza7282]

I just took back my pioneer HU and exchanged it with a Kenwood one and brought new steering controls and finally the controls are now all working, whoever told me my head unit was at fault.

I feel like im going to be sick!!!!!! It all seems to be working ok at the minute, in regards to money ill probably wait and just see what happens I guess, if the HU stops working within a year, ill send it back under warranty.

I'll probably just leave the rear shelf aswell, as I cannot be bothered to take it out. I also find it very confusing why the BOSE system would be completely different as to all the others.

Thats not the info i wanted to hear

[TheBoy]

I just took back my pioneer HU and exchanged it with a Kenwood one and brought new steering controls and finally the controls are now all working, whoever told me my head unit was at fault.

I feel like im going to be sick!!!!!! It all seems to be working ok at the minute, in regards to money ill probably wait and just see what happens I guess, if the HU stops working within a year, ill send it back under warranty.

Thats not the info i wanted to hear

Misuse and poor fitment is unlikely to be covered by warranty....

[mazza7282]

I just took back my pioneer HU and exchanged it with a Kenwood one and brought new steering controls and finally the controls are now all working, whoever told me my head unit was at fault.

I feel like im going to be sick!!!!!! It all seems to be working ok at the minute, in regards to money ill probably wait and just see what happens I guess, if the HU stops working within a year, ill send it back under warranty.

Thats not the info i wanted to hear

Misuse and poor fitment is unlikely to be covered by warranty....

lol id hope they will never know, but more to the point hopefully it wont come to that (although judging in regards to the ohmidge) then it might.

To be perfectly honest, this whole bose set up seems to be a big hassel for many people, I mean even when i had my orginal vauxhall stereo, it wasnt really all that good anyway 2 of my mates had bose in there audis and GOODNESS that made a noise, although I guess the set up in my car (when it was all bose) was around 6 or 7 years old by now.