Originally Posted by Deckard1979
My ears are pretty standard, but perhaps my taste in music is not.
It does not surprise me that the M50 has fans. It just surprises me that it has this many.
I can actually compare them in a sense to a pair of 'Beats' (eg. bass emphasised and lacking in definition), though admittedly they're nowhere near that bad.
I've said a few times to people that the way the ATH-M50s signature is how I expected the Beats to sound without hearing them first. Once I heard the Beats Solos, you're right, it was so, so much worse. An insult to music fidelity.
About the Sonys: I used them with stock pads for a year before I upgraded and started to play with them a bit, buying Beyer 250 velour pads and modifying the cable to make it a break-away. I still sometimes switch back and forth between the stock and Beyer pads because I feel like it does affect the sound ever so slightly and I'm not sure which one I like more. By the way, my latest upgrade made me truly realize how great the Sonys are for the money. I can see myself buying/selling a lot more headphones in the next few years, but I don' t think the Sonys are going anywhere. My latest upgrade is 5x more expensive according to their MSRPs, so you have to make big jumps to leapfrog the 7506s.
With the stock pads: They're very detailed, maybe a times just A BIT too bright (nothing major and does not decrease from my die-hard love of the 7506s), with solid and accurate but unspectacular midrange, and decent bass. The bass is a bit tight for my tastes and would occasionally leave me wanting more. No harshness or distortion at listenable volumes and overall a pleasing but slightly analytical sound as a symptom of the fact that they are monitor 'phones.
With the Beyer pads: They take a bit of the "bite" away from the treble and smooths them out a bit. It also increases the bass, but I think it increases it by bloating it slightly. It doesn't feel quite as refined as it did with the stock pads, but is sometimes a lot more fun. The Beyer pads possibly decrease the overall accuracy in other ways as well, as I sometimes suspect that the bass is bleeding into the lower mids, but I'm not knowledgable enough to say for sure.
Overall, the 7506s are a studio standard and are phenomenal for the money. If you find them harsh in the treble area or lacking in bass (or both), I recommend trying the Beyer pads for another $20. Those might modify their response curve enough to make them more to your liking. Hope this helps!