Added new speakers to the sony premium system. Audison for the doors and a JL stealthbox for the sub, powered by a JL HD900/5 amp with an ARC Audio SRI summing module. Doors and tweeters work fine but subwoofer does not. I am not getting any sub signal to the ARC summing devies Using a wiring diagram found on this site I confirmed the correct wires are being used. I found one thread that talked about shielding and ground but it was late and I was falling asleep so I bookmarked it(or so I thought) for later review. Now I can't find it all. This my first install and am learning a lot and most issues I've had were easily researched and resolved but this has me stumped.

Thanks for any help!

Tim