A friend of mine just wants to sell his used (but in excellent condition - 6 months old)) Beyerdynamic DT770 Pro 80 ohms for a half of the new price. I have tested them for 5 days against my 3 months old Audio-Technica ATH-Pro700 MK2 64 ohms connected on Fiio E07K and I cannot decide if I want them or not. And I don't want to start collecting headphones and having that dilemma of which headphone to listen to certain genre... The problem is that , having a different SPL 96 db vs 106 db , the DT770 sound weaker than Pro700 at the same volume and it is hard to find the same output volume. Mainly I listen trance and chill and I find that with DT770 I cannot hear clearly the drums/beat, it is transformed into a slow drum with that "ummm" because of the low end bass enhancement. At lower volumes it is pleasant, but rising the volume makes me wonder where is the beat and the high frequencies (and some mids) hurts my ears. I am aware that despite the same frequency range (5-35000 hz) the Beyers has more forward highs and maybe that vents that Beyers has create different low end bass, but I prefer the Pro700. I just wish that they had the sub bass of the DT770 and drums of Pro700. And maybe more medium frequencies. But, this can be obtained with an equalizer. I know that because of the M50 pads on the Pro700 I lost some hi and mids and gained bass , but I put them only for confort(hurts even with headband stretched) and I will maybe later come back to the original pads That's why I am asking you about the mids difference between them, what do you feel about it? What do you like more to decrease or to increase the equaliser to gain the desired sound, in my case to decreade the DT770 highs or to increase the Pro700 highs? As a reference a use also my Monster Turbine Pro Copper that I like so much for their bass, sub bass, mids and the highs that are not so crispy as the DT770. I know it's me, but I cannot tolerate well high frequencies oh high volume, where the bass shine. And I like to listen the music clean , without equalisation.