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Modern digital music typically is on the verge of clipping (close to 0 dBFS). Any amount of boosting with an equalizer, regardless of the frequency, can cause those samples to clip even harder. To prevent that, some equalizers apply a negative gain to create headroom.
Lets say you want to boost treble by 3 dB. You can do that but you also have to apply a negative gain of at least -3 dB to the whole track to avoid clipping. Some EQs a) do that automatically, some b) apply a fixed negative gain as soon as you raise one slider, others c) do nothing.
edit: btw, posting one thread with the same question is enough...
Edited by xnor - 6/10/12 at 5:56am
Default is yellow line. That's quiet. Got to level that is shown which is roughly 8% quieter then normal, yet still some distortion. This is to boost treble of bass heavy AIAIAI's. Might just get this: http://www.slashgear.com/fiio-e5-headphone-amplifier-1923327
Will that help with distortion?
Or just get the more balanced hm5 headphones. But idk which option I should choose.
Edited by clairyvic - 6/10/12 at 6:50pm
If clipping (distortion) happens in the digital domain, which seems to be the case, then you have to lower the EQ curve and turn up the volume on your iphone. If that is not enough then an amp like you linked would certainly help, as would another headphone that is a bit brighter.
What if I just got a neutral amp, and kept my balance the way it is. Using the amp to boost quality at higher volumes. So keep the aiaiai's, turn up treble like it is right now, and amp to get rid of distortion? Would that make for a high quality balanced sound?