I would be VERY interested to see EQ profile that they end up with. Very.

Okay, I think I got it. Maybe it's not the headphones, it's loudness. Although, even on higer volumes bass and mids overpower the rest of the spectrum. I need to give it a try on a plane where I constantly lack bass and observe too much highs in W60's.

What tips did you change to which? As for the measurements, those frequencies should be lower than the others (say 1 KHz), because of the Harman target curves, ear sensitivities and such, but yes, these graphs show some differences between the two. I will probably find someone to verify what is...

Looks like you own both W30 and UM Pro 50 - do you hear that drastic difference in high frequency output? I mean, for me the difference is night and day, like someone turned "Hi" pot on the amp all the way down all the times on UM Pro 50, it's so hard to not hear this. I am also contemplating...

Fully understood. I am using silicone eartips, largest ones. Sadly, even red (next in line smaller) are nor sealing enough, but I will try them on anyway just to understand if that would work. But seems like it's something I shouldn't do, artificially sacrificing seal to alter frequency...

So, back to my treble problem with UM Pro 50's. I had filters replaced. They indeed were brown and they were replaced to white (least resistive, I believe?). I honestly don't hear ANY difference. They are still highs-dead to me, and I have W60's to compare - those are piercingly, sharply bright...

I'll consult with them tomorrow and go this route. Thank you.

I looked into the nozzle and it doesn't look green. It's white or gray, it's hard to say not having other filters on hand to compare. Most probably it's white, and it's the same color as W60 have.

That's what I was expecting actually. It would be really strange if having less resistance to the air would make lows less prominent for some reason. Obviously perceived frequency response would shift towards highs, but that is expected. What kind of filter would you recommend to start with if I...

It's called Doctorhead. It's a very large headphone/earphone/music equipment store in Moscow and Saint Petersburg in Russia, and also they have a service department that does all kinds of custom stuff including reshells, custom shells and such. They do work all across Russia via mail, but I am...

Speaking of UM Pro 50 highs, filters, reshells and such - my headphone shop where I live turned out to be a very good service that does reshells, changes filters, has them in stock. I will just pay this little extra they charge for service and try changing its signature towards a little more...

I'd say W80 would be a significant upgrade over UM Pro 30

Thank you for this insight. I think you're right, it's going to be pretty complex to do that. Also, I seem to not understand how these filters work - I honestly thought they are acoustic filters, not electric (so, why Ohms then?)

What if I just remove the filter altogether? Would that be wrong to not put any other filter in - would that be the brightest sound UM Pro 50 can output? I experimented with comparing W60 to UM Pro 50 equalized to boost highs, and now I am confident I really lack highs in UM Pro 50 on most...

Chills running down my spine when I think about it. Also, it's a big question whether it's worth it - UM Pro 50 is tuned this way for a reason, and I honestly believe this reason is that there's a lot of poorly mastered music that is overly bright. Basically, for me it boiled down to the...