Kicker has always been known in the car audio world for producing high-quality speakers and powerful subwoofers. They’ve transferred that know-how into a wonderful playback system for your iPod, the Kicker iK500 ($349). There’s also a system available for Microsoft Zune: the ZK500. The iK500 is iPhone-compatible, but will automatically shift your player into airport mode when docked. With two-way speakers and a passive-radiating subwoofer, this might be the most powerful dock system available. The amplifier provides 40-watts RMS to the 5” woofers and ¾” soft-dome tweeter. This is a dedicated iPod system – no radio, no CD player – just iPod. However, there is an AUX input with stereo RCA inputs. For dedicated iPod and iPhone listeners, the iK500 is dedicated to making the most of your music.