I am installing my sub today using the Scosch LOC 3 channel combination method.

Do I cut or tap the rear subwoofer?

I have ML, if that makes a difference.

 

I tapped my wires right at the stock amp. I used a LOC also and then remove my subwoofer completely to allow a pass through for the trunk sub system. Very easy

 

I used CMUSIC write up to guide me https://www.clublexus.com/forums/is-...-overview.html

 

Thanks for the input. I dont know whats up, I must be on a black list or something. Responses to my questions are pretty rare these days.

I decided to leave the ML amp there and working. It sounds pretty good. I ended up using the Scosch LOC, so that I could combine the output from the front woofers and the ML subwoofer into my Amplifier.

So far it sounds awesome. I dont know if It would be better to cut out the ML sub though. I might just leave good enough alone.