well guys my jbl amp is crapping out.... what a surprise. so ill be replacing it in the near future and i need a few questions answered.

i plan on using the stock jbl head unit using the low level lines comming out of it, soldering rca jacks to them, then run that to the amp.

Q1: does any one know how many volts the low level lines are running at?
Q2 is: what ohm rating do the door and dash speakers have?
Q3 is: what is the rms rating for the door and dash speakers?

im sure ill think of somthing ive overlooked in the future. for now i have to get through finals week and the show at the theatre (runnin the sound board). once im home for xmas ill have time to actually rip the car apart and get to workin. till then i get to deal with a system that comes in an out when it pleases.