I've just ordered one of these to use with my iPhone 6 and B&W P7 headphones. It's a combined IPhone battery boost case, headphone amplifier and lightning DA converter.
The P7s sound great, but they sound even better with a little help. I've been using a FiiO Kilimanjaro portable headphone amp occasionally with them and noticed a difference. The Music Boost taking the digital signal direct from the lightning connector on the iPhone should make a significant improvement hopefully without the inconvenience of interposing a cumbersome additional device. John
