I got my pair of S4s from Amazon via UPS just now. My take? Great bass, super-muddy mids! The mids are so bad and recessed that I just hate these phones. I prefer my NuForce NE-7Ms to these, even though the bass on the NuForce phones isn’t as well controlled as the bass on these S4s. Great bass, but the price for that is apparently really crappy mids.
To be specific, it’s vocals in certain songs. Brain of J (Pearl Jam), Riders On The Storm (Doors), Say It Right (Nelly Furtado). One of my favorite albums to test headphones with is Bob Dylan’s Time Out Of Mind. Surprisingly, these phones were pretty much perfect for this album (the couple songs I tried, anyway). But, boy, do they butcher voices in the songs I mentioned above.
I have a pair of the Altec Lansing version of Ultimate Ears Super.Fi 3s coming tomorrow. We’ll see how they do. I’m not expecting much bass from them, but I’m hoping I’ll be pleasantly surprised. Update after trying them: Can’t get a good fit nor seal. These aren’t for me.
I only have my Etymotic MC5s here right now to compare with these Klipsch S4s and there’s just no comparison for what I like. All my MC5s are missing is some driving bass. All the S4s are missing is a forward (unmuffled) mid-range. But the MC5s win, for me.