Audiophiles who are less than thrilled with the sound that they get from their iPhone 4 or 4S now have a new companion accessory that is bound to make a difference in the quality of their listening experience. The US$650 V-MODA VAMP, available today from V-MODA.com and Amazon.com, is a rather different iPhone 4/4S case that packs a lot of power and sophistication in to a solid metal casing.
This isn't just a battery case, although it packs a 2200 mAh battery. It u
