does the pioneer have a built in electric crossover? most RF's have them built in and therefore cost a little more. and if you are going to buy RF don't go to BB. (i didn't even know they sold them there). go to Audio King, Ultimate Electronics (whichever is in your area) i had two 10" RF Series 1 and a 75w 2600 amp. i had the box custom built and my car sounded as good as some guys that had 200w pioneers. if the box is right, the RF's put out pretty good sound and hey, the subs are cheap if that is what you are buying. buy one get one free, you can't beat that. I got the service plan on my speakers, at the end of the plan i brought both subs in and audio king replaced them no questions asked.