www.mp3car.com
the online store has a product called an Infill T3 it's a flip-out double din Car PC... although it's not a Double-DIN like the G4, the specs on the T3 show it having a SPDIF Optical OUTPUT.....
...now pair this up with a Clarion 5.1 processor ..... which incideantally HAS an optical INPUT and all you need is to but an Audio Control DQXS like SOMEONE I know has... and Charlie's yer Aunt and Bob's yer Uncle....
I didn't see level controls on the Clarion piece hence the need for the DQXS.
...spoke too soon... Hot Damn! it does
http://www.speedsound.com/product.asp?specific=jnenpqdoo
This is the link^^^^^^^ for the Clarion DVH-940 DSP
...wonder how hard it would be to install an optical out on the G4...
..is it just a matter of soldering one in.... what do you think Dukk?
Because it also has an Intel HD Audio Processor...say hello to 8.1?
T3.jpg G4.jpg