V-Moda VAMP for the iPhone
 

If money really isn't an issue when it comes to your search for the finest sound possible from your iPhone, V-Moda has a new accessory for you to consider. The company has announced the VAMP: an iPhone 4 / 4S case that converts digital to analog for hi-fi listening. How does it work? Well, the kit uses a 150mW x 2 amplifier to bypass the smartphone's internals to offer the auditory elbow grease needed to adequately power that set of fancy headphones. For controls, you can expect a volume knob, hi / lo gain switch and toggle switch with LED indicator for either Pure or VQ listening mode. There's also an optical audio output for using your phone as a vehicle "for the purest and unparalleled audio listening experience," but you'll have to splurge for an extra cable to do so. In addition to the aforementioned conversion, the aircraft-grade metal add-on provides eight hours of playback from it's own battery -- which can be used as a backup for your Apple handset, should the need arise. Sound good so far? Well, the VAMP is now shipping and will set you back a whopping $650 with $50 of the asking price benefitting the InTheLoop Foundation. You know, if you happen to really love listening to Sigur Rós on the go and are obsessed with high fidelity playback.

http://www.engadget.com/2012/06/12/v...or-the-iphone/