The DT 990 PRO headphones are a set of over-ears from Beyerdynamic. The DT 990 PPROs are open-backed headphones, which literally means the back of the ear cups aren't totally covered with plastic. Open-back headphones make your playback to sound like you have a set of free-standing speakers right by your head, rather than echoing out at you from an enclosed space. Of course, the downside to this airy audio quality is you'll be able to hear everything happening around you and everyone around you will hear your music. Therefore, the DT 990 PROs should really only be used indoors. They're comfortable, have a long cord, and also come with a 1/4-inch adapter, all of which make the DT 990 PROs a great set of at-home headphones.
We finally got in the Sennheiser HD 800s. So what's our verdict? They're amazing. Really. They're one of the best pairs of headphones we've reviewed.
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The one sticking point, however, is their $1400 price tag. Check out our test results and graphs and whatnot; hopefully they'll help you decide if an investment in the HD 800s is an investment in your aural future.
The Etymotic Research mc5 headphones are an entry level set of in-ears. At $80, the mc5s offer a disproportionately high audio quality for their price. If you’re looking for a decent set of in-ears without spending over $100, the mc5s are a great choice.