Quote:
Originally Posted by -cj-
I hope this didn’t get answered in the thread already (long thread), but this confused me.
You mentioned Match amp is 8 channel and we counted 9 inputs from all our speakers, so the MEC brings us to 9. But I thought the Match10 is a 10 Channel?
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The UP10 has 8 high level speaker inputs. Not all cars have this many speaker channels. The HK system has 9 speaker channels so the MEC card is necessary for the UP10 to get speaker inputs from all of the factory speaker channels. These speaker inputs are used to create the audio signal that the DSP in the amp will process, sending the resulting sound to 10 speaker outputs. Not all cars have 10 speakers, but this allows for speaker customization in an aftermarket speaker install. But in the case of this BMW system, 9 of the 10 UP10 speaker outputs will be used (assuming you to use all 9 factory speaker locations).
Technically, the UP10 does not need all of those factory speaker inputs in order to create a good sound signal for the DSP to use. Typically, front left and right are enough for close to a full frequency range signal, with the left and right underseat woofers adding low frequency signals in order to give the UP10 a full frequency signal to work with.
However, in order to maintain full functionality like navigation and the PDC tones, all the factory inputs will be necessary.