Hey guys, here is another frequency response graph. The previous one is the "measured frequency response." This one is the "perceived frequency response."
This is exactly how they sound to my ears. I will only analyze the high frequencies at this time. I will get to the mid and low frequencies later.
Highs are not good on the AH-C300, as presented in this graph. There is a peak of sharp/piercing treble at 5kHz. Eugguy was right when he wrote that the AH-C300 had sharp treble for his ears. They do so, for my ears, too. Also, they should have a peak around 10kHz reaching to 5dB or higher. That is where the sweet treble is. All this means, that without equalization, the treble is sharp and dry (not sweet). That is awful. Fortunately, the AH-C300 are quite responsive to equalization. Just putting the 3kHz to 4kHz sliders (depending on the recording) to -2 dB and the 5kHz slider to -3 or -4dB (depending on the recording) and raising the sliders at and above 7kHz in an upward slope starting at about +4 to +6dB (depending on the recording), going through about +10 to +12 dB for 10kHz (depending on the recording) and a little above that for the higher frequencies sliders, the treble becomes a very good treble with very little or no sharpness and good sweetness (sssshhh).
I was wary of Eugguy's post about the sharp treble. My experience with headphones is that when someone makes a negative comment, even if it disagrees with a vast majority of the impressions, I end up finding out that my ears perceive the flaw, just like the out of order negative commenter/reviewer did. It has always happened and the AH-C300 are not the exception. I am so glad that this flaw could be fixed with equalization. WOW, the highs sound very good with the track that I am listening to while I type!
I wished portable players had 30+ frequency equalizers. I am stuck to listening in my computer, because that is the only place where I can have a lot of frequencies to equalize. I have 45 bands, using foobar2000. But, I am thankful for having that. So, no complaints here.
I will comment on the mids and lows later.
Edited by Alberto01 - 12/21/13 at 8:42pm