I have been scouring the internet trying to find out what my maximum "safe" wattage subwoofer amp would be for my 2013 CR-Z hybrid. I have seen posts on here that state they used a 1000w amp, and others saying they wouldn't go above 400w. This car is new to me, and my previous car I had an MB Quart 2000w Mono amp pushing 2x10" in a bandpass box. This car is much smaller so I was thinking I would take it down to 1x10", and was curious what size amp I will safely be able to use. I will not technically need more than 600w for the one sub, is this going to be perfectly fine? Also, I am planning to take the signal from the rear speakers with a line level converter and use the stock radio. Thanks for any info!