Quoted from 6S3NC3:If you go with the FF kit just go with the sub. Me and a few others found that the back box speakers do very little. I dont think there is enuff power to run the FF speakers to there potential. The magnet's on them are 10x bigger and look sooooo much better (from the back) but the power from the game cant push them. I wish FF sold a small little tiny amp with the kit to push them bc i would buy that right up in a heart beat!! hint hint
I was debating on trying these two items with some FF speakers...
http://www.amazon.com/PAC-SNI-35-Adjustable-2-Channel-Converter/dp/B001EAWS3W/ref=lh_ni_t
http://www.amazon.com/LP-2020A-Lepai-Tripath-Class-T-Amplifier/dp/B0049P6OTI/ref=lh_ni_t