A small titbit of information.

If you have one of the Apple approved DACs, then using a USB-A socket, any of the new lightning connector made Apple devices can be used as a digital transport.

That means the iDevice sends the audio digital out via USB allowing you to connect it to a standalone Digital to Analogue Converter and then amp for much better higher quality music reproduction.

One major benefit of the lightning connector that wasn’t so obvious in the beginning.