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[Dave DND]

Have you taken a Bose amp appart yet or played with one?

Chris.

Nope. Never personally had the need to. If anyone's got a spare lying around I'd be happy to do some research though.

Kevin

If you do end up researching this, give me a yell and I`ll send over the Porsche adaptor as well for you to play with

 

[VXL V6]

Kevin, I have a spare Bose amp I can loan you to have a nose at.

[Andy H]

The fact that theres no screened cable connecting the HU to the Bose amp would suggest to me that the amp input is floating earth, ie, balanced input, so along them lines it would make sense just to lower the speaker level from the HU.

From what I've deduced from the innards of the CCR2006  it's still the bridged power amplifier ICs in the 2006 that drive the Bose outputs exactly as if they were still speaker outputs so yes, it's almost certainly a balanced input to the bose amp.

Kevin

The Bose loom I have in my 2003 Facelift Elite IS screened from the outputs of the headunit to the Bose amp.

We probably need to be careful of changes that might have occurred to the equipment installed by Bose over the years.

[zirk]

The fact that theres no screened cable connecting the HU to the Bose amp would suggest to me that the amp input is floating earth, ie, balanced input, so along them lines it would make sense just to lower the speaker level from the HU.

From what I've deduced from the innards of the CCR2006  it's still the bridged power amplifier ICs in the 2006 that drive the Bose outputs exactly as if they were still speaker outputs so yes, it's almost certainly a balanced input to the bose amp.

Kevin

The Bose loom I have in my 2003 Facelift Elite IS screened from the outputs of the headunit to the Bose amp.

We probably need to be careful of changes that might have occurred to the equipment installed by Bose over the years.

Andy, are you saying the whole loom is screened or each individual speaker out to amp inputs are screened, if its the latter, can you remember if the speaker link wire was single screened or the speaker pair was twisted then screened?

Chris.

[Andy H]

Andy, are you saying the whole loom is screened or each individual speaker out to amp inputs are screened, if its the latter, can you remember if the speaker link wire was single screened or the speaker pair was twisted then screened?

Chris.

Right, just been and had a look.

The whole loom is loosely bound with sticky tape.

Each of the four signal pairs has a hard sheath over the screen and uses quite heavy cores (heavy for a signal but feeble for a speaker cable). The hard sheath doesn't show whether the pair is twisted or not. My assumption is that it is a twisted pair.

Why is it important whether they are twisted?

HTH

[zirk]

Right, just been and had a look.

The whole loom is loosely bound with sticky tape.

Each of the four signal pairs has a hard sheath over the screen and uses quite heavy cores (heavy for a signal but feeble for a speaker cable). The hard sheath doesn't show whether the pair is twisted or not. My assumption is that it is a twisted pair.

Why is it important whether they are twisted?

HTH

Thanks Andy, not really important as such but just more info that helps to cut out the guess work on Bose’s input and output methods and to help me try and understand why Bose have to do things totally different to every body else on this Planet.

Fairly sure when I played with an early Bose loom (don’t have it anymore), the speaker cables were unscreened, could be wrong. So was wondering if Bose changed their minds in the later models with running screened twisted pair (proper way for balanced audio) for their outputs and inputs, or maybe I just wasn’t paying attention first time round.

    Chris.

[Kevin Wood]

Kevin, I have a spare Bose amp I can loan you to have a nose at.

Sounds good. It might end up on the back burner for a while but sounds like something I can spend a rainy day experimenting with.

If you do end up researching this, give me a yell and I`ll send over the Porsche adaptor as well for you to play with

Thanks, Dave. That would be great.

Kevin

[Andy H]

Right, just been and had a look.

The whole loom is loosely bound with sticky tape.

Each of the four signal pairs has a hard sheath over the screen and uses quite heavy cores (heavy for a signal but feeble for a speaker cable). The hard sheath doesn't show whether the pair is twisted or not. My assumption is that it is a twisted pair.

Why is it important whether they are twisted?

HTH

Thanks Andy, not really important as such but just more info that helps to cut out the guess work on Bose’s input and output methods and to help me try and understand why Bose have to do things totally different to every body else on this Planet.

Fairly sure when I played with an early Bose loom (don’t have it anymore), the speaker cables were unscreened, could be wrong. So was wondering if Bose changed their minds in the later models with running screened twisted pair (proper way for balanced audio) for their outputs and inputs, or maybe I just wasn’t paying attention first time round.

    Chris.

The speaker cables from the Bose amp back to the kick panel are twisted/heavy gauge/ unscreened. It is only the signal cables (from the CCR2006 to the Bose amp) that are screened pairs.

[Andy H]

Some pictures of the Bose connector (and the cables from the HU) in my 2003 Elite.

HTH