Sub-woofer wiring advice ?

[Mikele82]

Hello,
trying to "simply" add a subwoofer to my xc70 2004.
so i got a 12inch woofer and enclousure box + amp + hi to low level converter
( https://catalog.pac-audio.com/catalog/a ... cing/lp7-2 )

333.JPG (37.62 KiB) Viewed 138 times

was thinking connecting it to the speaker wire = tweeter in the D-piller, just up from the trunk left fuse box.
but now im understanding that this line for The tweeter wires are crossed over too high of a frequency.

so what would be the simplest path to connect the hi-to-low converter for the sub amp with a full spectrum audio/speaker wire ?
would it be routing a speaker wire from rear door speaker ,
or
is there a simpler path from full spectrum speaker wire to route all the way to the trunk ?

also, is there audio out on this rear fuse box?

111.JPG (93.56 KiB) Viewed 139 times

the v70 has a REM diagram for subwoofer, is that somewere on the rear fusebox?

222.JPG (70.63 KiB) Viewed 139 times

[EngineeringBloke]

Hi, have you added your sub woofer yet?

While the diagram is for a 2007 model and yours is a 2004, it shows the unit at 16/79 is a subwoofer plus amp module.

That module gets power via 12v from the REM on B-17 and B-18, and ground via 16/79 lines 9 and 10. Those provide the power to run an amp to drive the sub. It looks like the amp is turned on via REM O-7.

The audio signal comes from the rear bass/mid speakers. I do not think there is audio in the REM itself.

Due to the dual 12v and grounds, it appears this is a dual mono (or stereo) sub system - it may have two speakers.