Sunday, November 8, 2015

iPhone audio output quality

It looks quite good, so long as you avoid 15 ohm loading.  At higher impedances, it looks to be lower distortion that the audio generator built in to my Keithley 2015 Generator/Analyzer.  iPhone is reported to have (iPhone 6) THD of 0.0012.  The Keithley generator has THD of 0.02%, while the Keithley Analyzer has THD of 0.004%.  I could measure the superiority of the iPhone to the Keithley Generator on the Keithley Analyzer.

Other performance is excellent too, except crosstalk is a bit high (still better than any FM tuner).

No comments:

Post a Comment