low-level output on stock system
 

Hello!

Is there any low-level output on the stock X5 audiosystem? Were is it located in the car? Diagrams?

I have the system with tv/nav but without the DSP amp.

What are you trying to integrate into the vehicle and I will give you the best case scenario on what to use to integrate this product.

Yes, but it depends on your car's manufacture date. If you have the non-DSP system, you can get low-level outputs from the radio module in the trunk. BMW switched to the "new gen" radio in 2002, so I will list the radio pinouts for both types of radios.


Old Gen Radio Main 17-Pin Plug X18126
Pin 1 Left Front Audi Output (+)
Pin 2 Right Front Audio Output (+)
Pin 3 Left Rear Audio Output (+)
Pin 4 Telephone mute signal
Pin 5 Switched +12V
Pin 6 Right Rear Audio Output (+)
Pin 7 I/K-bus signal link
Pin 8 Left Front Audio Ground (-)
Pin 9 Un-switched +12V
Pin 10 Speedometer (A) output signal
Pin 11 Right Front Audio Ground (-)
Pin 12 Left Rear Audio Ground (-)
Pin 13 Night light signal
Pin 14 Right Rear Audio Ground (-)
Pin 15 Radio ground
Pin 16 Radio ON/antenna signal
Pin 17 Not used


New Gen Radio Main 16-pin Plug
Pin Description / Signal type
Pin 1 Right Rear Audio Output (+)
Pin 2 Right Front Audio Output (+)
Pin 3 Left Front Audio Output (+)
Pin 4 Left Rear Audio Output (+)
Pin 5 Right Rear Audio Ground (-)
Pin 6 Right Front Audio Ground (-)
Pin 7 Left Front Audio Ground (-)
Pin 8 Left Rear Audio Ground (-)
Pin 9 I/K-bus signal link
Pin 10 Telephone mute signal
Pin 11 Telephone ON signal
Pin 12 Radio ground
Pin 13 Antenna supply
Pin 14 Night light signal
Pin 15 Unswitched +12V
Pin 16 Switched +12V

is the pins that you marked as audio output +/- low-level outputs? even with non-dsp systems?

I recently had a Parrot bluetooth kit fitted and the installer couldn't get the telephone mute pin to work on my system.

Am thinking I will try testing the corresponding pin from your pin guide. Any idea when the change over for radios was during 2002? (I will count the number also.)

For testing: presumably the radio needs a 12V positivie signal pulse to activate the mute function. Can anybody confirm this? And what is the telephone ON pin for? Stupid question probably.

Thanks a million!

Yes, the radio changes behavior, depending on the amp connected to it. If DSP, then the signals are low level, but full volume. If standard HiFi amp, then I believe that they are "normal" low level. If no amp (only offered in Europe), then the radio puts out speaker level, but low wattage outputs.

This is exactly the info I need (ok, took me a long time to find it:-)

I could adapt high level (speaker) signals down to line level for an amp, but I'd prefer to get line out if possible. Is there any way to fool the radio into thinking there's a basic amp connected?

But in this case are they not balanced signals as per el_duderino's info?

http://www.xoutpost.com/bsws-mobile-e...dsp-audio.html

The radio communicates with the amp over the car's I-Bus. So, you could simply buy a used amp and connect it to power, ground, and I-Bus. Then, the radio would detect the presence of the stock amp and do whatever it does in response. This would be a good experiment, to see if the volume changes in the car when the radio "sees" the amp.

But as I understand it from the thread I mentioned above, wouldn't that produce balanced signals?

I don't know if the balanced signal behavior changes with the amp connected. For all I know, it probably does. The system is pretty sophisticated.