I'm planning to disconnect my 10" rear deck sub woofer and replace with aftermarket sub+box and amp but don't know what color speaker wires the sub woofer use. for my level input line out converter.
Does anyone know the color of the rear deck sub woofer wires from the speaker from the amp itself? It looks like grey and grey w/red stripe from an image on the internet but it's inaccessible from the trunk so i need to quire from the amp out put. Any help would be greatly appreciated.

I believe it was grey but I would have to doublecheck. I do remember few things when tinkering. I isolated all of the pairs (same color +/-) and identified the Sub wire to be the thickest of those sets.

Try adding a sub/amp but you might have to remove the subwoofer from the deck (which is a PITA) as the trunk compartment is pretty sealed and sound waves won't get into the cabin. For example, I simply hooked up a 12" box/woofer to Bose amp and ended up with worse than stock results (ended up removing it). Adding an amp might make things better.

Also, be aware that there is a gas tank between the seat and trunk. DO NOT drill towards the seat.

Thanks for the reply S430AMG.
Do you think it's the same color wire coming out from the bose amplifier?

Yes, just separate all the speaker wires from power/other wires.

When you hold all the speaker wires together you should be able to see the thickest set, that's the sub. Cut it with enough room on each side so you can easily reconnect it back up.

Thank you for your help.greatly appreciated.