mistasmiff

Hi Thomas,

I also just bought a Bose rear speaker system on eBay to replace my stock (cubby) speaker system.

I just took the whole thing apart and looked at the wiring. And what I found is really weird:

The Bose box has two sets of speakers

1.) two tweeters, 3 Ohm each

2.) two drivers for the subwoofer, 1 Ohm each

The weird thing is that the two tweeters are connected parallel and the two subwoofer drivers are connected parallel.

Well, the connector out of the Bose unit has only four wires.

That means if you hook up your original wire then you will have the following effect:

One channel (dunno if left or right) will be connect to the two tweeters

The other channel will be connected to the subwoofer.

In simple words you will hear the left channel in high and the right channel in low (or the other way around), not exactly Hi-Fi.

To make things worse as each pair of speakers is connected in parallel now the tweeters are total 1.5 Ohm and the subwoofer 0.5 Ohm

Several conclusions:

1.) The Bose cable (from the head unit or Bose amp) has different wiring than the stock Porsche cable

2.) If you hook the Bose box up with the stock Porsche cable you will hear something, but I am pretty sure it will sound like crap

3.) If you hook the Bose box up with the stock Porsche cable sooner or later your head unit or amp will overheat and fail as the impedance of the Bose sepakers is WAY to low.

So here is what I will be doing:

* rewire the speakers (as suggest in this thread) that one tweeter and one woofer are in line each.

* rewire the cabling to the connector so that I hear left in the left speakers and right in the right speakers

Unfortunately I have to go on a business trip tomorrow but I'll keep posting about my little project as it goes along.

to be continued ....

I haven't test drive it a lot after the swap, since it is already snowing in Canada and the car already in storage. I find it the base is a bit better than my previous rear speaker system, but I need to spend more time on it to compare the different. The Bose system size is identical to my previous speakers system, my previous system is a factory storage chasis with 2 speakers on each side and there are sliding dorrs on the center.

Very interesting..I have no intention to use the current speakers in my new bose rear deck which I picked up for peanuts off ebay, I'll be ordering 2 6" JL subwoofers and 2 JL tweeters. I just need to make sure the subwoofers are not too deep for the box. B)

Hi,

I have the BOSE Rear Deck, I know bose speakers run at 2 OHM so can I use ANY amp that is capable of running at 2 Ohm to power them?

Also has anybody completely upgradeds all the BOSE speakers in the rear ddeck to better after market speakers ?

Thanks. :)