Quoted by 'Ken Rockwell
http://www.kenrockwell.com/apple/iphone-6-plus.htm#measurements
Sorry Ken, i hope you dont mind me copying you comments
"Holy cow; I tested a
Beyerdynamic A200p DAC and headphone amp at the same time I had the iPhone 6 Plus in my audio lab, and
the iPhone 6 Plus beat it! The iPhone 6 Plus has less distortion, flatter frequency response and much better ability to drive low-impedance headphones with low distortion than the dedicated portable amp!
While all iOS devices have always sounded great if you have
good transfers, the audio output of the iPhone 6 Plus is now so improved that it sounds and measures about as well as professional reference DACs like the
Benchmark DAC1 HDR, and
better than many
consumer DACs.
The iPhone 6 Plus even has flatter response than the
Benchmark DAC1 HDR! Of course an iPhone and a plug-in-the-wall professional DAC are intended for entirely different pupposes, but if the 1 volt RMS output (6 dB less than good outboard DACs and CD players) and 3.5mm jack do it for you, there's no reason not to use the iPhone's output for critical listening.
The iPhone 6 is a
better analog audio source than many
audiophile products, but the cottage industry created around selling you DACs and other accessories you don't need doesn't want you to know. Remember that accessory dealers, manufacturers and publications that accept advertising from these makers have a vested interest in trying to create
FUD about the iPhone's audio quality. Don't beleive them and listen for yourself.
Apple has more smart engineers and far more resources than any other audio specialty company. It makes perfect sense that the iPhone output should be spectacular.
No longer do you need to waste money on DACs and headphone amplifiers, at least for most portable (low-impedance) headphones. Save your money and spend it on more
music instead."
Anyone care to comment on the above
. We can all just stop wasting our hard earned $$$$ on DACs and amps. LOL