Crossover locations

[Gutta Trash]

Hi everyone, I have searched the forum, and found plenty of answers to my audio questions, if I had the B&O..... unfortunately I have the Concert platform and can't find the answer to this question. Are the factory crossovers in the head unit, the factory amplifier, or inline?
I'm going to be doing a SQ Competition build soon and would prefer not to be surprised. If they are in the head unit, has anyone figured out a work around yet?
If they are in line does anyone know exactly where?
If it is in the factory amp, it won't matter, I won't be using it for music.
Edit: 2010 A5 B8 Concert series
Owner: Gutta Trash Audio

[Bobby Kinstle]

It depends on the setup, but most of them are inline. I know the B8 B&O rolls off the front door woofer but I don't think the concert system does. Usually Audi just wires the tweeter and woofer in parallel and then puts a cap on the tweeter and lets the woofer roll off naturally.

The "head unit" is located in the center of the dash behind the CF card slots. There's an optical MOST output there that's full range and if you can grab that and feed it to a DSP, that's your best bet.

[Gutta Trash]

The "head unit" is located in the center of the dash behind the CF card slots. There's an optical MOST output there that's full range and if you can grab that and feed it to a DSP, that's your best bet.

There's an optical out on the concert series?

Owner: Gutta Trash Audio

[Bobby Kinstle]

There's an optical out on the concert series?

Owner: Gutta Trash Audio

The same base head unit is used on all systems. The features are enabled and disabled in software with the VCDS or other tools. They may not have the output available to plug into. You'll have to pop it out and see. If you have B&O for example, they enable the optical output and then connect it to the B&O amp/processor in the trunk.

[bruce_miranda]

There will be two levels of crossovers. The active crossover is built into the HU or the amplifier. Then if the same speaker out is used to driver two speakers, generally done for tweeters, will be another High pass active crossover at the tweeter. Most OEMs don't use passive Low Pass or Band Pass crossovers.