Adding a sub to non Bose Audi concert

[steve094]

Hello I have a standard non Bose Audi concert and I wast to add external active sub I have the live and the ground wired also the speakers to it so there is a steady 12 volts passing through and there is a non amplified bass how do I get the stereo to remote switch the amp which cable would this be?? I tried to use a cable going to the blaupunkt amp in the boot but this doesn't seem to have achieved anything. Please help me. Or ask for any further details.

 

[perry30sport]

You will need to run the remote trigger wire to ignition. Fuse of on end of dash is best bet.

 

[steve094]

Worked perfectly thank you