Originally Posted by elfary
iPhone 4/4s don't reach 2 decibels of linearity loss.
iPhone 5 goes close to 3.
With some iems there's a tonal difference and the 5 skews more the signal than 4/4s.
I must tell again that in Westone i was told to always look for a source with the lower output impedance. In that regard 3'27 is worse than iP 4/4s. A step back however you look at it.
The tf10 plot was just a snapshot of the effect of 3'27 in real world.( More on this on the iPhone 5 measurements thread).
I don't deem the 5 as a bad perfomer. Just worse than previous versions
On side note It's worth noting that unloaded crosstalk has gone from -95 to -83.
You have not really understood something unless you can explain it to your grandma.
These are extreme cases with IEMs that are specifically bad with the device. So of course it'll look bad. That's what I'm trying to say. Would it be fair if I try to drive a DT880 600 Ohm out of the iPhone 4S and condemn it for not having enough voltage to push the headphone to listenable volume? Of course not.
It's obvious you won't get perfectly linear FR from either the iPhone 4/4S or 5. If there is distortion, then it's just bad regardless of whether there is more or less of it. It just looks to me likeeven the iPhone 4/4S aren't ideal. If you want to drive those IEMs, I think an external amp with <1 Ohm output impedance fed through LOD would do much better.
Again, not everyone owns IEMs with impedance drops. Some of us use headphones that don't exhibit this current-limitting behavior, and we have been able to get by just fine.
I'm not defending the iPhone 5, but I think this whole iPhone 4/4S vs 5 debate is getting ridiculous when you start throwing out measurements as the absolute baseline way of telling how inferior a product is without even trying it with your own ears.
Like someone else said, judge it when you have heard it.Edited by Bill-P - 10/10/12 at 9:57pm