[Sixman]

Hi,

Audiotec Fischer has a couple of plug and play harness for our cars, supporting both the current non-Burmester sound system and Burmester sound system.

Audiotec Fischer

For the A W177 non-Burmester sound, you can refer to MATCH PP-PAC 80.

For the A W177 Burmester sound, you can refer to MATCH PP-MB 1.9MBUX-BUR

The above applies to the CLA C118 as well.

I came across them while researching to upgrade my current Burmester sound system because I too am not satisfied with it.

The plug and play harness would allow you to connect to their Match Up 10 DSP and it looks promising.

I am still in the midst of researching and comparing, but at least this one is a plug and play option which makes it highly attractive to me.

Looks like that harness is a high level speaker to line level converter for their dsp amp.
I dont think there is a method to get digital or analogue signal directly from mbux.
If your going down this path have a look at minidsp harmony - probably the best dsp with dirac live. Audison also make good dsp units. With those you can plug the speaker level lines straight into the dsp.

I have 2 issues with my burmester system - not enough deep bass and I dislike the drone from the exhaust noise piped through the speakers. The bass issue is the subwoofer is too small, but I also dont want to lose boot space. Maybe aftermarket subs under rear seat may be an option?

 

[Sixman]

The only limitation there is that the signal probably allready has a high pass filter and other dsp applied as its only going to the sub amp. Would probably have to test the signal first to see if worthwhile and what the output voltage/imedance is. May not be compatible with all amps, seen some really low output from stock systems.
Also realised the subs under ŕear seat is probably a bad idea as there are airbags under the seats on the sides. Picturing a bass line triggering an airbag!