2013 Audi A6 Bose Speakers - Modification Option Questions

[oreopride]

Hey audiophiles! For the last 2 years I've had an Audi A6 2.0 and 2017 Miata, but due to never putting miles on the Miata and driving very little on the Audi (I drive a total of 3k a year now) I decided to sell the Miata and trade the 2.0 in for a 3.0.

I get lucky pretty quickly and find a mechanically-near perfect (for now) 2013 Audi A6 3.0 at the dealer with 68k miles. Two catches: It has some worn clear coat/scuffing on the paint and a deep scratch that's going to cost a couple of k to fix and the sound system turned all the way up can barely be heard on the interstate. "Oh, I've installed amps/subs before" I say as I negotiate with the dealer to take another 1k off for the audio components. Deal is good and I drive 200 miles home while barely being able to hear the speakers.

I had an NB Miata (early 00's) before the 2017 and, if you're unlucky, you end up with one of the terrible Bose systems. In the Miata community there were multiple guides on how to do the "Bosectomy" because you couldn't just use normal, aftermarket components with the system (most are 4 ohms and the Bose are something like 8ohms.) It wasn't too bad when I had to do it to my car but you're routing 1ft of cable to some door speakers from an easily-accessible amp.

Well, this car has a Bose system and from some preliminary reading it sounds like it's tied into the MMI and ignition. I'm searching around to get started on what the typical way to approach this; from looking around I think there are at least *9* speakers in this car (one being a subwoofer), so it's not the same as taking 4 out of a small roadster.

Is there a search term I should be using or an ultimate guide for how to go forward with this? I assume it's (1) replace speakers with very expensive OEAM Bose speakers or (2) add a DSP to change the outputs and purchase new speakers to tie into that system.

[Bobby Kinstle]

I haven't seen a detailed breakdown of the bose system but your MMI outputs a fiber optic signal called MOST bus that sends the audio to the bose (or B&O) amp in the trunk. In some cases some of the speakers are driven by the head unit in the glove box, and in others all speakers are driven by the external amp. Dunno which case yours is. You can always pull each driver and measure it. It's not as hard as it sounds.

[dkb7]

You need to get rid of the bose amp. Replace it with a dsp and what ever amps you want. You need a module that converts MOST to digital or rca to connect to the dsp. Common high end audio would be 3 way speakers in front and a sub.

[Optimus247]

BUMP

I am going to add a powered sub to my Bose system ... (since I have one sitting in my garage)

Where can I see a wiring diagram for the Bose harness in the rear ...?

Will the LC2i work (or an alternative) ...? on the line out to the OEM sub ...?