rjpianist wrote:Just to clarify, is it the open-back that makes the sound better? What is the advantage of open-back?
Is something more compact like: Sennheiser HD 239 ($119) going to sound better than my Sony MDR-7506's? And what about semi-open like AKG K 240?
I am not an audiophile even though I'm a musician. I can't really imagine spending more than $100 on headphones. My Sony's are 15 years old, so I guess I could spring for a new pair if you can explain to me what will sound different.
My Koss Portapro's are night and day better than the MDR's I use at work.
What is special about open? It is simple physics; the open design means that it is a naked driver up against your ear. The air outside is free to move as it pleases (no pressure). You hear exactly what the driver vibrates, following the natural principles of sound in space.
As soon as a closed design is introduced, there is an unnatural 'pocket' of buffering air around the driver, which requires all sorts of clever engineering to maintain a natural sound propagation model. Very expensive closed phones do what it takes, but its always a matter of compromise and gimmickry.
Low cost closed results in: coloration of voicing, dulling of detail, punchy lows with 'body' (good thing), and quick drop of from attack (no air tail..)
Open results in extremely nuanced detail, rich high dynamic range midtones, 'air' tail in the 'space' around the notes (soundstage and presence), and no muddy coloration. A downside is the bass punch from large sound sources felt in real life is lessened... there is less 'pressure' to the initial attack of low frequencies, though the volume of bass can be every bit as good and present as closed. (in the case of the MDR, there is very minimal very low frequency to begin with)
To summarize:
Open = Rich, natural, organic, airy
Closed = Punchy, canned
Non sound: as Kalessin notes, there is something very comfortable about not being acoustically closed off from the outside world; it is a subtle pleasant thing that I love. Also, sound goes in and out of open phones with ease, so keep that in mind for practical purposes (not a problem for me 99% of the time)
As kalessin also notes, most headphones are not 'linear' in frequency distribution, one of the reasons the Sony's are so often bought for production purposes (they aim for linear). This can be simply addressed by using the EQ feature of pianoteq, and plugging in the inverse of your phones frequency graph (what I do with the Portapros which are too loud in the 100hz-250hz range, and too low above 4000hz). I also should note that I had broken in these particular PPros very nicely by playing moderate volume classical string music for a day on loop, which really seems to have put them above other PPros that I had not initially broken in this way. Also, I did the 'Kramer mod' by drilling in holes on the plastic guard between the ear and driver, which resulted in greater air and high freq detail.
For these reasons, I would not recommend a Ppro (not linear, needs tlc to reach full potential). I would start with Grado SR80i which are factory broken-in to maximize driver detail/tone balance, and time tested for their linear richness. To dabble in open, you might pick up a Koss KSC75 for $20, which are more linear than Ppros; you should ideally break them in first (day long loop of moderate volume strings worked well for my special Ppros) The clip design tend to weaken low frequency response, but its a great deal on such drivers for $20.. And remember, its the sound card that is driving half the sound (a good new card can make it sound like you did a phone/speaker upgrade)