[makkan00]

Originally Posted by gIzzE

Aren't you using a 475 amp?

You have 4 channels. Not 4 channels plus sub channels.

You also have a pre lci car, so just disconnect the oem connector from the sub, don't go cutting wires.

Run new cables from your sub to your rear channels on the amp.
Hook the rear in and out connectors into each other and the front connectors into the amp.

Gizze
If you read my post carefully, it will answer what Jammy asked.
Nobody said to cut the wires for underseats!
And running new cables for the underseats has already been mentioned.

Question is, if he uses the rear channel of the harness for rear signals to go back to the rears, how would he connect the underseats to the rear channel output on that amp? (without the socket pug)