I was one of, if not the first to order the VAMP through V-MODA's official website once it was put up for sale after months of rumors, speculations and advertisements. Featurewise, VAMP is a very unique product in many ways, and I'd like to discuss its functions and capabilities compared to other portable DAC's, amps, or DAC/amps before sharing my impressions.   First of all, VAMP is a portable DAC/amp for the iPhone 4/4S, but that doesn't mean its usage is strictly limited to an iPhone 4/4S. Although they won't fit into VAMP's case physically...