Originally Posted by miceblue
What amp are you using for a reference, if I may ask? Slight forwardness of the midrange is evident when compared to the O2.
I have all sorts of amps and gear. From a hifi infinity speaker system with a denon avr998 to my alesis studio monitor speakers on my duet to other gear as well. But I'm simply talking about frequency response. I don't need a reference amp for that. If you look at the graph here: http://www.kenrockwell.com/apple/images/ipod-touch-4g/measurements/FR-CD1-5-dB.gif You can see that the 4th (which is pretty much identical to the 5th) is almost perfectly flat with absolutely no mid range drop or boost. Flat. It sounds flat too with flat earphones such as the pfe112. You can hear the pfe112's slight 10khz hump (very slight), but that just shows the accuracy of the ipod even more. With that said...
The C5 using the line out sounds "identical" frequency response wise to the ipod touch. That means the c5 should measure perfectly flat. That is simple logic. :-) However, as I was saying before, there are definitely things that attribute to the "forward" sound you might be hearing. First and most likely is a change in equipment. Differences are going to be heard in "reference" to your last equipment, because that is what you're familiar with. Then you have separation, which isn't accounted for in a frequency graph. You have the brightness we discussed due to the clarity and spaciousness. You could translate that to the midrange forwardness as well by saying the space between notes is fuller making it sound more thick and thus forward in the midrange? Just a thought. You have dynamics which affect the overall smoothness or crispness, where the smoother dynamics could sound like more midrange in general. But my point was that the mid range isn't boosted in "frequency".
I believe you that it might be different than the o2 in it's sound though. And my guess is that difference in the fullness, but I'd have to hear the o2. However, based on a flat measurement of frequencies I don't think people can describe the C5 as anything but flat. I bet if John showed us a graph it would be extremely flat from top to bottom...
Edited by luisdent - 5/3/13 at 9:30am