lol i really think the mdr-1r headphones are actually really midcentric but the bass is also boosted/colored. i've compared them extensively with the akg k550, sennheiser momentum, and m100.
it actually took me a while to get used to the mdr-1r's sound signature b/c i believe i am just used to a more v-shaped sound with bass emphasis & extension into the super low frequencies like the M100 which I really liked (although the bass boost on the M100 was a bit too much sometimes). M100 had amazing bass in my opinion. very well-done intense bass-boost that makes you want to dance to the beat. of course, the mids were slightly recessed, but I didn't really mind. seemed very well-balanced for a v-shaped pair of headphones to me.
I really liked the AKG K550 because I thought everything was very balanced/flat, while there was not as much quantity of bass, you could really hear the extension down into the super low frequencies. However, the bass was a bit too anemic for my tastes and the treble also sometimes sounded a bit metallic sometimes for some reason. This was my second favorite sound signature after the M100 though.
The Momentum did not really stand out to me. There did seem to be a bass boost over the AKG K550, and things were just not as clear as the AKG K550. However, I would say that it was very well balanced pair of headphones with the slightest bass boost. Sound stage for the Momentum and the K550 was both very exceptional.
the sony mdr-1r's sound signature and bass is definitely very different from what I'm used to or expected. I believe it definitely has an unique colored & bass-boosted but mid-centric sound signature. The bass is present, but I feel like I am missing the super low rumble or intense impact. So these are definitely not a basshead pair of headphones as you don't ever get the feeling that you just want to jump around to the bass. This is not a bad thing as you can distinctly hear the mids and vocals very prominently. There is absolutely no bleeding of the bass into anything else and the bass never seems to take over the song. Bass never gets overpowering as it sits very controlled in the background. You also never feel like the bass is anemic like the K550. Actually, the MDR-1R coloration makes the sound very easy on the ears as there is no harshness to the treble and it definitely does not seem overly bright. The mids are very prominent. Seems to be a very unique coloration as it was very different from the other headphones I've tried before.
Using the audiophile glossary, this is how I would describe things:
AKG K550: Treble-focused: Airy, Analytical, Breathy, Depth, Detailed, very Dry, sharp, spacious, transparent
V-Moda M100: Bass-focused: Bassy, Colored, wet, laid-back, prescence, reverberation, seisemic, weighty
Sony MDR-1R: Mid-focused: Colored, Fullness of sound, semi-dry, not sharp, smooth, extremely warm, lush
I would also be extremely interested in seeing if you guys agree with my matching of audiophile terms with headphones. Please let me know what you guys thought of my impressions!!
thanks