Well, I picked up my Prius about a month ago now and it was finally warm enough for me to install the sub amp. Honestly, this was the easiest amp install I think I have done to date. I currently run the stock JBL setup for now because I think it is decent for what it is. For the sub amp I run an alpine that does about 200Watts RMS @4ohms. I had an oldschool sub box (one of the many I made back in the day) with a 15" and 12" MTX in it, which completely drowned out everything. Even with the gains all the way down. It was fun, and it hit seriously hard. However, I am a long since retired bass head. For now, I have a pair of 6" woofers adding some low end, which will not last long because they are low wattage. I was thinking of taking the 12" out and just using that. Anyway, I was wondering what people were using for a nice well rounded sub that sounds good. Since this is my first "hatch back", any insight would be good.