Coding DSP to non DSP system
 

Coding non DSP to DSP system
Hello, I put a DSP amp, speakers, and sub woofer into a non DSP X5 and I was wondering if I need BMW service to re-code my X5? I see the DSP settings in my navigation screen and I can change the settings. They only problem I'm having are if I turn the volume loud on highs the speakers cut out.. I'm think its because I used the same power lead from the non DSP amp which was a smaller gauge wiring and I'm thinking the amp is pulling to much power and is cutting out.. Does anyone know how much BMW charges to do this re-coding? Any help please would be greatly appreciated.. Mark

If it were the wire gauge, re-coding wouldn't fix it, would it? You would need a bigger wire.

If the nav is seeing the DSP and letting you set it, it should be fine...the only thing is that the HU has to be in DSP mode and have a fixed line out to the amp, and the amp has to change volume internally.

To see if the HU is fixed in level, you really need to use a voltmeter on the preamp leads into the amp and turn the volume up and down and see if the voltage rises and falls.

But it is probably fine - if the HU "sees" the DSP amp on the bus, then it probably switched the output fine.

The radio and DSP relationship in the car are self-configuring. Before the radio turns on, it scans the I-Bus for the type of amp, if any, that is connected. It will self-configure its behavior, based on the amp that it sees. This does not require any dealer coding.

Coding does two major things to the DSP amp. First, it sets the amp to expect control inputs from either a nav computer or from the MID in the dash. Second, it sets some internal crossover frequencies and equalization settings that are unique to each body style and acoustic characteristics.

Since you have navigation, if you install a DSP amp from a car that did not have navigation, your amp would shut off after about 30 seconds. That is normal until get get it coded. If you are not seeing this, then your amp is properly coded for your nav system.

The second aspect of the coding is subjective. If the amp was coded in an E38 7 Series or E39 5 Series, it may sound different in your car compared to how it might sound if coded for an X5. However, if you like it as it is, I would not mess with it.

I guess the real problem is the system cuts out if I'm listening to a CD with the volumne on high. Do you think it's the size gauge of wire that I used from my non DSP amp or could it be a bad DSP amp? Thanks.. Mark

The radio and DSP relationship in the car are self-configuring. Before the radio turns on, it scans the I-Bus for the type of amp, if any, that is connected. It will self-configure its behavior, based on the amp that it sees. This does not require any dealer coding.
Thank you Brian for info ...I thought so too but you confurmed that