I finished my upgrades and what a difference. First, I kept the stock 2010 JK Sport radio. I changed the dash and sound bar speakers with these Kicker 40CS654 6-1/2" 2-way car speakers at Crutchfield.com. Next, changed the tweeters with these Pioneer TS-T15 (tst15) 3/4" Soft Dome Tweeters - Sonic Electronix. Finally, added this sub woofer under the passenger seat Sound Ordnance B-8PTD 125-watt compact powered subwoofer at Crutchfield.com. Polyfilled the front and sound bar speakers. What a huge difference for around $350!