When the portable inMotion speaker designers at Altec Lansing released the non-portable M602 Digital iPod Speaker System a year and a half ago, the appeal was obvious: as a combination of metal-grilled speakers and an iPod dock, M602 offered an audio experience close to the popular, similar Bose SoundDock at two-thirds the price, with added versatility in the form of bass and treble adjustments, video-out, line-in, and USB sync features, as well as…
