Summary: The V6/7506 are quite overrated by many members. The treble is harsh, and grainy, and lacking extension. The bass is boomy, uncontrolled, and lacks any amount of articulateness. The midrange is terrible. My rating of 4/10 for the midrange of these phones is quite generous. The only thing worse is street styles. If you do not need sealed headphones do yourself a favour, and look for Koss PortaPros, or KSC55.
Summary: While many people bash these cans, I have to rectify a few things. First, these cans are some of the flattest <$200 cans. People complain about the harsh mids and stuff, but when you look at the fletcher-munson curves, you get why flat cans sound a little harsh around 3kHz. There certainly is a cut in the low mids, between 200Hz and 600Hz and this is the only very really annoying point about those cans. This cut in the low mids leave the mid accuracy to be desired.
Summary: they aren't worth the average price of 50-60$. there are a slew of better headphones in that price range. the main problem with these is that the highs are painfully bad. they are screechy and unbalanced with the rest of the sound.
Summary: The Sony MDR-7506 delivers deep but somewhat sloppy bass, recessed mids and fairly harsh highs. The overall sound quality is not as good as it should be, even for a closed headphone at this price point. It is efficient enough for use with most portable players, and is generally comfortable for me to wear (except for the usual sweating around my ears due to the stock pleather pads). With all that said, the MDR-7506 is an OK starter closed full-size headphone.
Summary: This hugely popular phone has been around for decades, and for a reason: it offers a pleasing sound with comfort and nominal portability - and comfort. At higher volumes, there can be a certain hardness to the sound at around the 3k level. Since this is a closed phone, it probabkt shouldn't be judged by the standard of comparably-priced open designs.
Summary: For the money - one cannot beat these cans. I use them at work, to block out the surrounding noise. I do find, however, that these really take off when connected to a high quality amplifier – no preamp necessary, I assure you. Yet, even for connecting to a laptop computer they still do the job nicely. Isolation is great for the application I use them in – listening to nature relaxation CDs such as ocean waves and stream sounds while at work.
Excerpt: To be fair, I have only limited experience with this type of headphone. The sound quality, noise blocker and headphone manipulation are excellent. I was also expecting unquestionable comfort but it is uncomfortable to sit through an entire movie. I need to remove these headphones every 30 minutes or so because it begins to feel like my ears are lossing circulation and get in pain. I fear that if I was a ConeHead, I'd have to remove them every 5 minutes or so.