thanks again. the install shop used a line level input to hook up my kappas to the amp they sound really good. they did all the connections in the trunk. was this the easy way out instead of grabbing signal from behind hu. i was going to use the same place for door component hook up.is it ok to use line level inputs again? i hate being a knob about this but it's the first time i have messed with amps. i have always got a high powered hu and run good wire to 4 new spks. googled some stuff and was told if factory amp is off no sterring wheel controls will work or other functions run off of radio. tire press monitor oil mont. etc.