I'm going with a Kenwood CD Receiver with 3 4v preamp outputs....from what ive seen, this is a great product. For the rest im going with all Kicker supplies as follows: 2 6x9's, 2 5.25's, and 2 1" tweeters, and 1 12" sub with its own kicker amp built in the box, i have another amp suppling the 4...