Ever since Beats by Dr. Dre
Design and features
For starters, the new Studios are 13 percent lighter, are built more sturdily, and have more-detailed sound. They also boast softer earcups and an "ergonomic bellow to create a flexible, custom fit for every head shape." I'm not sure what "ergonomic bellow" means, but they do seem very comfortable, offering a snug fight and a fairly tight seal without feeling too tight. I was able to wear them for long stretches without a problem. However, like any over-the-ear model, they will steam up your ears in warmer environments.
While they're still made mostly of plastic, the new Studios, which come in white, black, or red, are better constructed and seem like they'll hold up better over time. Personally, I think the white model looks the best because the darker red and black models come across as more plasticky and thus, more cheap-looking. Also, the black attracts fingerprints (a small cloth for buffing the headphones is included). I don't think it was an accident that Beats sent me the white model to review.
Beats says the new Studios have no "visible" screws, which is good, because those tiny little screws on the headband of the original made a habit out of unscrewing themselves and falling out. However, when you break the headphones down -- they fold up (though not flat) to fit in a nice carrying case -- you'll notice Torx screws on the joints on each side of the headband. That joint does have some metal in it and snaps nicely into place when you unfold the headphones.
Beyond that carrying case, you get a few other extras, including both a straight cord and one that integrates an Apple-friendly remote and microphone for cell-phone calls. (The remote features may not work with non-Apple devices but the microphone will.)
On the inside, there's a new, "improved" DSP (digital signal processor) and software that Beats has dubbed the Beats Acoustic Engine for marketing purposes. These are active noise-canceling headphones and they now come equipped with two modes of "adaptive" noise cancellation. According to Beats, one mode is for music listening and offers "balanced" adaptive noise cancellation between your music and your environment, and the other mode has stronger noise cancellation for when you're disconnected and just want to shut out the world.
Instead using a standard AAA battery to power the noise cancellation circuitry, the new Studio headphones have an integrated lithium rechargeable battery that you juice up via a Micro-USB connection (a cable is included). Battery life is rated at 20 hours and there's a five-light LED "battery fuel gauge" that indicates how much charge is left. There's also an auto on/off feature for automatic shutdown once you unplug the headphones. That's a nice feature that all noise-canceling headphones should have.
The original Studio model led to the rise of headphones that overemphasize the bass and wasn't really true to its name ("studio" headphones are supposed to be accurate). And while the new Studios may not be true audiophile headphones like the ($350 list), they don't overwhelm you with bass. I'd describe the sound as "exciting" -- lots of detail and bass energy. If anything, there's some treble push.
Compared with the Momentums, the Studios aren't as accurate, but they're still a lot of fun to listen to, and one of the better-sounding active noise-canceling models I've heard. The Momentum headphones have less emphasis on detail, so they sound more natural.
Bass-wise the Studio pair certainly delivers -- it's powerful, but the Momentums' bass sounds better-balanced. Vocals sound more natural on the Momentum headphones (the Studios lack some of the richness that makes voices sound human).