As well as its as-standard, full-speed iPod connector, the Sony CDX-GT420IP is an AM/FM tuner and has the ability to play CDs and compressed disc-based audio formats such as MP3 and WMA. Its front-mounted generic auxiliary input jack lets non-iPod owners connect their media players, too. For such a simple device, the CDX-GT420IP features some impressive audio-tweaking options: In addition to its six preconfigured EQ3 settings, it enables users to create their own custom EQ curve, and to fine-tune output by adjusting the level of the low-pass filter. A separate control for subwoofer level is also a nice touch.
In sumWe like the functionality of the Sony CDX-GT420IP. With a price tag of less than $150, it provides an affordable and user-friendly means of playing digital audio from a variety of media, including iPods, other portable audio players, and compressed disc-based formats. Despite its simple design, the CDX-GT420IP does a good job of giving drivers access to their iPod libraries on the road and delivering robust, tweakable audio output.